Ask Question Forum:
Model Library:2025-02-08 Updated:A.I. model including DeepSeek is online for auto reply question page
C
O
M
P
U
T
E
R
2
8
Show
#
ASK
RECENT
25-06-28 16:30:14
Wilson Edwards
Reply:3
Post_ID:829370google adsense
as TitlePlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-06-28 16:00:17
Wilson Edwards
Reply:0
Post_ID:829369googles adsense
As TitlePlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-06-27 11:44:47
Wilson Edwards
Reply:2
Post_ID:829367googleads;drive traffic;adsense
I read some outside third-party company to prompt driving web traffic to my website to increase my google adsense revenue.How are they able to do ?During driving traffice to my website, it will create google adsense impression or not ?Google will treat that impression is invalid ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-06-27 11:02:02
Wilson Edwards
Reply:0
Post_ID:829368googleads;invalid traffic
I read some outside third-party company to prompt driving web traffic to my website to increase my google adsense revenue.How are they able to do ?During driving traffice to my website, it will create google adsense impression or not ?Google will treat that impression is invalid ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-05-05 20:08:11
test test
Reply:3
Post_ID:829366googlebot;crawler;cloudflare
Accept
How my website can use cloudflare with"Under Attack Mode" and be able to allow goolge bot, crawler to crawl my website pages at the same time ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-04-17 16:26:31
Wilson Edwards
Reply:1
Post_ID:829365css;html
Accept
as title Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-04-14 19:42:56
Wilson Edwards
Reply:5
Post_ID:829364javascript
Accept
Please adviseThanks
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-04-14 01:47:39
Wilson Edwards
Reply:2
Post_ID:829363javascript
I have set iframe addEventListener with mousedown event, it works becoz the iframe source is same domain ofthe current page..For example<iframe id=''myiframe" src='https://samedomian.com//test.html'></iframe><script>document.getElementById("myiframe").addEventListener('mousedown, function () {console.log('mousedown event detected');});</script>But when I change iframe src to external domain or cross-domin such as https://example.comit doesn't work, the reason it is blocked by cross-dmain policyAny mothed to solve this issue, how to detect mousedown event on iframe ?
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-04-14 01:22:51
Wilson Edwards
Reply:2
Post_ID:829362javascript
For example, I have a link in DIV-A tag now I can not click the link in DIV-A because it is covered by DIV-B I want to click the link DIV-A anyway. I tried this example, it work at https://computer28.com/learn/pointer-events.php Any other good example or other method to achieve this ? Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-28 09:26:04
Wilson Edwards
Reply:5
Post_ID:829361google_drive;php;centos8
I would like to download all my google_drive files by using php program code onmy linux centos 8 system server, how to it ?How to get the google API key to start download for php program ?Since the download file size is very huge, how can I speed up the download the file ifits size is more 100G size ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-12 23:38:28
Wilson Edwards
Reply:1
Post_ID:829360javascript;html;css
Accept
I would like to create child node inside of body tag and enclosing all elements inside body tagby javascript code;For example:Before:<html><body><div></div><a></a><span></span></body></html>After, if I would like to see this reuslt, creating new div tag enclose everything inside of body tag, new div tag 's id is new_child_nodeAfter:<html><body><div id='new_child_node'><div></div><a></a><span></span></div></html></body>Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-03 21:46:28
test test
Reply:4
Post_ID:829359cloudflare;proxy;socket;python;centos 8;apache
I am using cloudflare to protect my website recently,but I have a page which is using python socket to send streaming data to visitor with 5000 portsuch as http://mywbesite.com:5000.Before using clouldflare, visitor can get data from port 5000, now after usingcloudflare, all visitors to my website can not get any data from port 5000.Now I pause cloudflare, the python socket port is working back again..The question is I would to like to keep all cloudflare service such as proxy but python socket port need to work for exception by cloudflare, how can I do that ?My Simple python socket code:from flask import Flask, render_template, request, session,jsonifyfrom flask_sse import ssefrom flask_socketio import SocketIO, emit, join_roomimport platformimport loggingfrom flask_cors import CORSimport socket....if __name__ == "__main__": app.run(host="0.0.0.0",debug=False, port=5000, ssl_context=("mycert")
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-02 21:19:15
test test
Reply:3
Post_ID:829358cloudflare;VPN;proxy;linux;apache
My website is using cloudflare internt traffic protection.I am using php code to monitor all internet ip through chrome browser to my websitefor example, monitoring $_SERVER['HTTP_X_FORWARDED_FOR'] and$_SERVER['REMOTE_ADDR'];I try it in those different computers with different ISP ip, I found the result as followsCase-1 Computer A,$_SERVER['HTTP_X_FORWARDED_FOR']="51.58.202.19";$_SERVER['REMOTE_ADDR']="172.64.0.0"where51.58.202.19 is my Compuer A ISP ip and172.64.0.0 is cloudflare use proxy server to get the webpage for Computer A.Case-2 Computer B,$_SERVER['HTTP_X_FORWARDED_FOR']="61.85.102.11";$_SERVER['REMOTE_ADDR']="61.85.102.11"where61.85.102.11is my Compuer B ISP ip and$_SERVER['HTTP_X_FORWARDED_FOR']=$_SERVER['REMOTE_ADDR']My question is Why in case-1 Cloudflare will use proxy to get webapge for computer A butcloudfare don't use proxu to get wbepage for computer B in which both php ip is same from$_SERVER['HTTP_X_FORWARDED_FOR']=$_SERVER['REMOTE_ADDR'] ?Second question, in what condition ro when Cloudflare use proxy or not use proxy to get webpage for browser visitor?Final question isIf cloudflare use proxy , it mean visitors of Computer A, ISP IP maybe bot or maliciousor suspected IP , Can I release Google Ads on my webste and allow the vistior of Computer A to click the ads ? If the visitors click the ads, it mean the click is excuted from Computer A, ISP IP or from Cloudflare 's proxy IP ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-02 12:50:13
test test
Reply:2
Post_ID:829357cloudflare;google chrome;apache
Question 1- Cloudflare show warning, too may redirect on chrome solvedAnswer: solved by removing all redirect from http to https since cloudflare will handleall redirect from http.Since in apahce httpd.conf, we added the following for http to https and except some directorybased on this linkhttps://stackoverflow.com/questions/5818146/how-to-force-rewrite-to-https-except-for-a-few-pages-in-apache#RewriteEngine on#RewriteCond %{SERVER_NAME} =computer28.com [OR]#RewriteCond %{SERVER_NAME} =www.computer28.com#RewriteRule ^https://%{SERVER_NAME}%{REQUEST_URI}[END,NE,R=permanent]#RewriteEngine on#RewriteCond %{HTTPS} =off#RewriteCond %{REQUEST_URI} !^\/local\/#RewriteCond %{REQUEST_URI} !^\/world\/#RewriteRule (.*)https://%{HTTP_HOST}/$1[L,R=301]#RewriteCond %{HTTPS} =on#RewriteCond %{REQUEST_URI} \/fid\/ [OR]#RewriteCond %{REQUEST_URI} \/php\/#RewriteRule (.*)http://%{HTTP_HOST}/$1[L,R=301]Comment it all, it works nowQuestion-2:How to Fix ERR_QUIC_PROTOCOL_ERROR Message in Chrome Browserwhen using cloudflareAnswer-2https://kinsta.com/knowledgebase/err_quic_protocol_error/https://www.hostinger.com/tutorials/how-to-fix-err-quic-protocol-errorchrome://net-internals/#dnsHTTP/3 Cheker:https://http3check.net/?host=computer28.comhttps://kinsta.com/knowledgebase/flush-dns/on Window 10:ipconfig /flushdns //clear all DNS cachingFinal, if still can not solve question-2, delete cloudflare account and then re-create new other account using other gmail accout to see any help from resetting all cloudflare default setting.Need to wait 1-day or 2-day. to see theERR_QUIC_PROTOCOL_ERROR will be sovledor not...If above answer can not be solved, any suggestion or solution to solve those those bothquestions,Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-01 19:03:13
Wilson Edwards
Reply:2
Post_ID:829356centos 8
as title for the question, I read the link,https://devco.re/blog/2014/06/19/client-ip-detection/ it works , for php as following code., Any other method besides php code, to dectect the ip is real ip not VPN not TOR IP not proxy IP?<?php if(!empty($_SERVER['HTTP_CLIENT_IP'])){ $myip = $_SERVER['HTTP_CLIENT_IP']; }else if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){ $myip = $_SERVER['HTTP_X_FORWARDED_FOR']; }else{ $myip= $_SERVER['REMOTE_ADDR']; } echo $myip; ?>
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-03-01 17:56:38
Wilson Edwards
Reply:2
Post_ID:829355google ads;cloudflare
Google Ads can be shown if my website is using cloudflare protection ? and next question isCloudflare can protect my websie from Bot Fraud Click on my website Google Ads.My Cloudflare account is free version Cloudflare.Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-28 00:17:59
Wilson Edwards
Reply:4
Post_ID:829354google;reCAPTCHA
I just created reCAPCHA fromg google site athttps://www.google.com/recaptcha/admin/createand following his instruction, created my first reCAPCHA html page such as follows<!DOCTYPE html><html lang="en"><head><script async defer src="https://www.google.com/recaptcha/api.js"></script></head><body><div class="g-recaptcha" data-sitekey="6LcIhOQqAAAAAGbMD-QaT-xjh9VYF87D7w6uMw4n"></div></body></html>The page is successful and show google reCAPCHA, but it will ask me to do image testCan I bypass the image test, just tick the I am not a rebot box only ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-26 04:32:58
Ty Yt
Reply:1
Post_ID:829353Linux apache
As tilte
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-25 04:28:14
Wilson Edwards
Reply:2
Post_ID:829352centos;linux
I am using linux command, host, to check the revserse ip , some is not found but if I am using, online tool, that IP is normal, not abusive ipHow to check the IP is abusive ?
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-23 19:30:17
Wilson Edwards
Reply:3
Post_ID:829351香港樓市;Hongkong housing price
Accept
香港樓市, 現在買 Okay ?
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-23 17:06:22
Wilson Edwards
Reply:4
Post_ID:829348google adsense
Accept
my website server is new or small server, recently, just start up my server width Google Adsense ads into my site.DUring, these past 7-day, I get page view not much, but have 50 impression and 20 click dailyI check all my apache log file, those access to my wbesite is not too freqently, butToday Google banned my Google Adsense Account, including this time, Google already banned my site for 5-time.The reason is invalid traffic, I have already followed all rules from GooglePlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-20 15:15:06
su e
Reply:1
Post_ID:829347excel vba 技術趨勢圖陰陽燭
excel vba 技術趨勢圖陰陽燭
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-18 17:05:47
w kk
Reply:3
Post_ID:829345葵芳地鐵站葵涌廣場鋪位
葵芳地鐵站葵涌廣場鋪位
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-18 16:46:59
w kk
Reply:1
Post_ID:829344why we use
as tile
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-18 16:43:41
w kk
Reply:1
Post_ID:829343bitcoin
as title
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-18 16:33:55
w kk
Reply:2
Post_ID:829342as title
Accept
as title
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-15 21:18:40
Wilson Edwards
Reply:7
Post_ID:829340google;adsense;crawler
Accept
I just want disallow Google search indexing engine to access all my files and all my directories except some files such as index.php and music.png and let ads.txt can be crawled by Google Adsense Crawler Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-12 00:53:08
Norton Alex
Reply:1
Post_ID:829260javascript
my question is same as the title And, I search it on internet, the closer one is this link https://stackoverflow.com/questions/3538021/why-do-we-use-base64 Any good article about this topic Regards
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-12 00:48:17
Wilson Edwards
Reply:2
Post_ID:829290window10/11;apache;centos;php;html
Accept
After clicking some Googe Ads and leave the ads site or delete the tab, your browser may forwards you to other site which may give you message such as "Congrulation,! You Get Prize, Bonus, Coupon.etc" Probably your browser is infected by virus and the Congurlation site is hacker /attacker virus site.. I will think the following methods to solve my problem, Please advise those methods are correct 1- Right away or now, remove the forwars site(Congrulation site) or delete such browser Tab 2- Look at this image: https://computer28.com/image/deletecache.jpg Delete or clean your chrome browser data At Chrome browser, Click Sitting->Privacy Security->Delete Browser Data, it will pop up window, in that window, Click Advanced->Select Time Range(All Time)->Tick all box below Time range such as Browsering History..etc. Click Delete Data button 3-If using Window 10, Turn on Microsoft Defender Virus Protection System, always turn it on https://carleton.ca/its/help-centre/how-to-enable-windows-defender-on-personal-pc/ You are better to install Microsoft Window 11 if u are using WIndow 10 4- Add X-Content-Type-Options: nosniff on header at my apache server
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-12 00:32:47
Norton Alex
Reply:3
Post_ID:829339centos;apache;php;html
Accept
as title with the topic tag
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-11 17:12:06
test test
Reply:2
Post_ID:829338centos;linux;A.I.
I would like to stop all A.I. access my website through VPN or TOR browser,How I know the A.I. is accesing into my website pagesPlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-11 17:07:11
Wilson Edwards
Reply:1
Post_ID:829291javscript;google_cookie
For latest browser, u can only read cookie value by javascript code. Remove and Update cookie by javascript is very difficult...To read all cookie, u can go to devtool, Mouse Right-click->inspect->Application->Cookieu can see all website cookie u are accessing..You can remove all cookie for the website..by php codingFor example:<?phpif(isset($_SERVER['HTTP_COOKIE'])&&stripos("#".$_SERVER['QUERY_STRING'],'gt=3')>0){$cookies = explode(';', $_SERVER['HTTP_COOKIE']);foreach($cookies as $cookie) {$parts = explode('=', $cookie);$name = trim($parts[0]);setcookie($name, '', time()-1000,'computer28.com');setcookie($name, '', time()-1000, '/','computer28.com');setcookie($name, '', time()-1000,'.computer28.com');setcookie($name, '', time()-1000, '/','.computer28.com');}}if(stripos("#".$_SERVER['QUERY_STRING'],'gt=3')>0){header("location:https://computer28.com"); }?>On address bar with gt=3, it will forward to the main domain site,For update cookie,justsetcookie($name, ''', "the time you want for expire",'computer28.com');Hope it help
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-11 16:38:06
Wilson Edwards
Reply:1
Post_ID:829337google search;SEO
I would like to set requirement to let google seach engine to index all my website pages, just allow some pages of my website can be indexed by Google..How I can setup the system or requirement for the pages selected to be indexed from robots.txt or sitemap ?Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-11 11:25:10
Wilson Edwards
Reply:5
Post_ID:829335hongkong food
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-10 21:49:16
Wilson Edwards
Reply:4
Post_ID:829336centos; bash
Accept
I am using bash linux shell, running ollama serve on CLI console is working, but when it can not work on cron job scheduler, why
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-10 14:17:47
Wilson Edwards
Reply:5
Post_ID:829333php; html;javascript
Accept
In php script, if echo "<a></a>" it render as html elementas we understand it, but when doing in php, $str=htmlentities("<a></a>"); then $str=html_entity_decode($str); $str is not equal to "<a></a>", $str is string. why that is not HTML element
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-09 20:46:03
Wilson Edwards
Reply:3
Post_ID:829332javascript;html5;css
Accept
as title with topic tagPlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-09 10:49:51
Wilson Edwards
Reply:1
Post_ID:829325chrome;curl;php;python3.9
Accept
I would like to distinguish between those vistors are A.I. or real human to access my website.For example, some A.I. will use VPN and automaticlly access my website through, for example, curl or other methdos, I would like to block those A.I. auto crwaling IP and trafficPlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-09 10:32:17
Wilson Edwards
Reply:1
Post_ID:829324javascript;html5;css
Accept
as title and topic tagPlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-07 01:07:31
Wilson Edwards
Reply:0
Post_ID:829299gcc;linux
When upgrade gcc or lib, it will cause issue, and may cause reboot is not working for exmaple: https://blog.csdn.net/qq_39295044/article/details/86685789 su root Password: node: /lib64/libc.so.6: version `GLIBC_2.18' not found (required by /lib64/libstdc++.so.6) nvm is not compatible with the npm config "prefix" option: currently set to "" Run `nvm use --delete-prefix v16.20.2 --silent` to unset it. For example, running ------------------- node node: /lib64/libc.so.6: version `GLIBC_2.18' not found (required by /lib64/libstdc++.so.6) Or php php: /lib64/libc.so.6: version `GLIBC_2.18' not found (required by /lib64/libstdc++.so.6) after re-install glibc at /usr/local and run nvm use --delete-prefix v16.20.2 --silent` //for node other issue now ok, php and node but got some error when install python3.9 version rm -f /usr/local/glibc-2.18/build/stubs.h /usr/local/glibc-2.18/build/elf/sln /usr/local/glibc-2.18/build/elf/symlink.list rm -f /usr/local/glibc-2.18/build/elf/symlink.list test ! -x /usr/local/glibc-2.18/build/elf/ldconfig || LC_ALL=C LANGUAGE=C \ /usr/local/glibc-2.18/build/elf/ldconfig \ /lib64 /usr/lib64 LD_SO=ld-linux-x86-64.so.2 CC="gcc -B/usr/bin/" /usr/bin/perl scripts/test-insta llation.pl /usr/local/glibc-2.18/build/ /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libm.so: undefined refe rence to `__strtod_nan@GLIBC_PRIVATE' /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libm.so: undefined refe rence to `__strtof128_nan@GLIBC_PRIVATE' /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libm.so: undefined refe rence to `__strtof_nan@GLIBC_PRIVATE' /usr/lib/gcc/x86_64-redhat-linux/4.8.5/../../../../lib64/libm.so: undefined refe rence to `__strtold_nan@GLIBC_PRIVATE' collect2: error: ld returned 1 exit status Execution of gcc -B/usr/bin/ failed! The script has found some problems with your installation! Please read the FAQ and the README file and check the following: - Did you change the gcc specs file (necessary after upgrading from Linux libc5)? - Are there any symbolic links of the form libXXX.so to old libraries? Links like libm.so -> libm.so.5 (where libm.so.5 is an old library) are wrong, libm.so should point to the newly installed glibc file - and there should be only one such link (check e.g. /lib and /usr/lib) You should restart this script from your build directory after you've fixed all problems! Btw. the script doesn't work if you're installing GNU libc not as your primary library! make[1]: *** [install] Error 1 make[1]: Leaving directory `/usr/local/glibc-2.18' make: *** [install] Error 2 Change libm.so link to 2.18 version Make sure glibc, libc.so libm.so is same version
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-07 00:06:18
Wilson Edwards
Reply:6
Post_ID:829297python3;centos;deepseek
Accept
Could not install ollama from python3 install ollama...so try alternative ,using python3 install openai , but easy example python script still not working, , the error is such as AttributeError: module 'ollama' has no attribute 'chat' import ollam //or improt openai response = ollama.chat(model="deepseek-r1", messages=[ { "role":"user", "content":"how center a tag in a div tag by javascript" }, ]) print(response["message"]["content"]) OR next example: import os import openai openai.api_key = ("key") openai.ChatCompletion.create( model="gpt-3.5-turbo", messages=[ {"role": "user", "content": "Hello!"} ] ) print(completion.choices[0].message) // Error AttributeError: module 'ollama' has no attribute 'ChatCompletion' if use comand line ollama, it works > ollama server //need enable port 127.0.0.1:11434 > ollam run deepseek-r1 >>>>"chat" Any Advise ? Try to list all module : print(dir(ollama)) //No any moduel name, chat... Error: Command '['/home/..../venv/bin/python3.x', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1 https://stackoverflow.com/questions/24123150/pyvenv-3-4-returned-non-zero-exit-status-1 Reference: https://cristianzsh.medium.com/installing-and-using-deepseek-ai-c7fd97332e0f https://stackoverflow.com/questions/2927993/where-are-the-python-modules-stored https://pypi.org/project/ollama/ https://python.langchain.com/docs/integrations/chat/ollama/ https://ollama.com/search https://hungchienhsiang.medium.com/error-could-not-find-a-version-that-satisfies-the-requirement-from-pip-install-f542143e705d https://ywctech.net/ml-ai/ollama-first-try/ https://github.com/ollama/ollama-python https://github.com/ollama/ollama
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-05 00:23:20
Wilson Edwards
Reply:1
Post_ID:829298python
Accept
I try to upgrade my python version from 3.6 to 3.9 I also get ,glibc error /lib64/libm.so: undefined reference to `__strtod_nan@GLIBC_PRIVATE' and solved it ....just checked all glibc, libm , libc, all version is matched to , for exmaple.2.18version relink, ln -sfn /lib64/libm-2.18.so libm.so.6 //before is libm-2.31.so not matched https://stackoverflow.com/questions/59578152/undefined-reference-to-strtof128-nanglibc-private after the above error solved, I get other errorat make altinstall, got the errorerror _testembed.c:1767: undefined reference to `__gcov_indirect_call_profiler'just following the instruction as reference link Installation python 3.9 reference: https://phoenixnap.com/kb/how-to-install-python-3-centos-7 https://blog.csdn.net/liuruiaaa/article/details/130890408
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-02 21:48:44
Wilson Edwards
Reply:0
Post_ID:829296virtualbox;macOS;window11
Read this link https://computer28.com/hk/article/install-macos-virtualbox.doc.php
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-01 22:06:35
Wilson Edwards
Reply:0
Post_ID:829288python;javascript;simulation
Basic Concept: https://www.youtube.com/watch?v=IrbJYsep45E&t=663s https://www.youtube.com/watch?v=JOJ5zihcd6Q Google 's Willow Chip for quantum computing: https://www.youtube.com/watch?v=G3o4sPpGWFI https://www.youtube.com/watch?v=FgZ-8NFSysA&t=134s https://www.youtube.com/watch?v=CMO1MEeUcXg Shor's Algorithm: https://www.youtube.com/watch?v=FRZQ-efABeQ https://www.geeksforgeeks.org/shors-factorization-algorithm/ Simulator quantum computing by python: https://github.com/lvillasen/Quantum-Computer-Simulator IBM quantum simulator/platform for public: https://en.wikipedia.org/wiki/IBM_Quantum_Platform (Some region is blocked by IBM,u can use VPN from Chrome VPN Extension) Basic GCD, greatest common divisor: https://en.wikipedia.org/wiki/Greatest_common_divisor How it works: https://www.youtube.com/watch?v=g_IaVepNDT4&t=63s https://www.youtube.com/watch?v=c0D8X4eN_Cg&list=PLnK6MrIqGXsJfcBdppW3CKJ858zR8P4eP https://www.youtube.com/watch?v=XuN6sF8UGSw
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-01 21:42:42
Norton Alex
Reply:1
Post_ID:829295javascript
Accept
my html page calling many javascript file, I worry, some function name will be double or over-written by each other. Any method to prevent this .Please advise;
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-02-01 21:15:33
Norton Alex
Reply:2
Post_ID:829294javascript
Accept
I have seen a lot javascript file whcih starting with "!" character before functionWhat is the purpose of that ?For example;!function(x){a=x}()Please advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-01-29 21:04:40
Wilson Edwards
Reply:4
Post_ID:829293javascript;python3;chrome
Visitors or users may open many page of website to get streaming data ,and they want to open many browser tabs to read different data. That will depend on your Laptop or mobile capiblity how can handle many new socket.io to run on multiple tab at the same time, If limited computer resouce or memory, you will be limited for number of browser tabs display.If u use socket with Redis /stream event that allow display directly into html page tab (just type https://yourdomain:5051/stream on address bar) or throught javascript parse data into html page but it may only allow 3 tabs running on the same time.How you can run it on many tabs ?-----------------------------------------------1-You can use localStorage(getItem or setItem) to share information between browser tabOr...you can use2-window.addEventListener('blur', notstream);window.addEventListener('focus', stream);When the user not read or not focus the tag, close the streaming socketio, then Whenthat users want to read it again and focus the tag, reconnect the socket. We know users only can read 1 tag at a time only,function notstrem(){souce.close();//close the socket.io}function stream(){//user focus the tab againrefresh();// re-run that funation u can stream data before}function refresh(){//Redisvar source = new EventSource("https://yourdomainsocket-site.com"+":5051/stream"); source.addEventListener('publish', function(event) {dataextract(event.data);if (typeof ws=='function')ws(event.data);if (typeof updatechart=='function')updatechart(event.data); }, false); source.addEventListener('error', function(event) { }, false);return source;}let source=null;jQuery(document).ready(function($) {console.log("onload");source=refresh();});
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
25-01-23 19:49:42
Wilson Edwards
Reply:5
Post_ID:829292javascript;jquery;php
$(document).click(function(e) { // ####Check for left button if (e.button == 0) { // alert('clicked'); console.log('page......clicking'); checkhitrate('ads_hitrate');//check the document.activeElememnt source such as ifram or <a> tag }else {}});it works but can not detect mouse right click or mouse left click;so try to other code such as followsvar mouseleft=null;document.addEventListener('mousedown', function(event) { switch (event.button) { case 0: mouseleft=1; checkhitrate('ads_hitrate'); console.log('mouse Left button clicked.'); break; case 1: mouseleft=0; console.log('mouse Middle button clicked.'); break; case 2: mouseleft=0; console.log('mouse Right button clicked.'); break; case 3: mouseleft=0; console.log('mouse Browser Back button clicked.'); break; case 4: console.log('Browser Forward button clicked.'); break; default: console.log('Unknown button clicked.'); }});*/it is working ok, but not work if the content area with iframe...so we need use blur as followswindow.addEventListener('blur', notFocused);function notFocused() { localStorage.setItem('focus','0');setTimeout(()=>{$(window).focus();},200);checkhitrate('ads_hitrate');console.log('NOT focused',ia2++);return 0;}and check whether visitor leave current page to forward to other site, use this function becoz we can not idenity it is right or left click.if .onbeforeunload even is triggered it mean it is from left clickwindow.onbeforeunload=function(e){ console.log('hist-onbeforeunload'); localStorage.removeItem("stateHistoryonbeforeunload"); localStorage.setItem("stateHistoryonbeforeunload", 1);}event onbeforeunload should be earlier than checkrate();function checkhitrate(hitrate){ if (hitrate=='ads_hitrate')sendclick();}function sendclick(){if (document.activeElement.src) var tmp=document.activeElement.src ; else tmp=""if (document.activeElement.tagName === "IFRAME"){if (tmp.indexOf('client=ca-pub-')>0){setTimeout(()=>{console.log('notfocused _post3',"stateHistoryonbeforeunload",localStorage.getItem("stateHistoryonbeforeunload"));document.activeElement.blur(); if (localStorage.getItem("stateHistoryonbeforeunload")=="1"){_post3(url,JSON.stringify(obj),fun);localStorage.removeItem("stateHistoryonbeforeunload")}},200);}}Note: every click then clear last document.activeElement by document.activeElement.blur() so next check click will be working again
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
24-12-31 23:06:18
Wilson Edwards
Reply:0
Post_ID:829289economy
https://www.investopedia.com/terms/t/trilemma.asp https://en.wikipedia.org/wiki/Trilemma Example Video: https://www.youtube.com/watch?app=desktop&v=pNlUmPZ1UC4 Any region is only able to do 2 options from the following 3 choices for itseconomy system at the same time, 3 choices: A=Independent monetary policy(獨立自主貨幣政策), B=fixed Exchange Rate(固定匯率) ,C=Free Flow of Capitial(資本自由流動)For example:USA: ACHongkong: BCChina:AB
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
24-11-27 13:34:32
Wilson Edwards
Reply:2
Post_ID:829287yoututbe
Accept
as the title, which online site is the bestPlease advise
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
←
- Underline
- Bold
- Italic
- Indent
- Step
- Bullet
- Quote
- Cut
- Copy
- Paste
- Table
- Spelling
- Find & Replace
- Undo
- Redo
- Link
- Attach
- Clear
- Code
Below area will not be traslated by Google,you can input code or other languages
Hint:If find spelling error, You need to correct it,1 by 1 or ignore it (code area won't be checked).
X-position of the mouse cursor
Y-position of the mouse cursor
Y-position of the mouse cursor
Testcursor
caretPos
Attachment:===
Server CPU high utilization, appears to be Apache, how do I determine the cause
Asked by jrm213jrm213
at 2024-07-28 09:15:30
ModifyPoint:500 Replies:19 POST_ID:829139USER_ID:12032
Topic:
Apache Web Server;;Linux
We have multiple servers behind a load balancer. Currently our usage is low due to it being summertime and the majority of our websites are used by teachers and students at various schools. For example during the school year we get around 30k users a day, currently we have about 3k users a day.
I have recently begun to notice that the CPU usage on the servers behind the load balancer is much higher than expected, (.42,.41,.35) and it appears that a couple of apache processes are causing it, running between 7% and 14% cpu usage, there constantly 1 to 2 of these while the rest of the apache processes are at about 0-4% cpu.
In the past when we had high utilization, it only ever reached about these levels. So I am concerned that when we get back to 10x the amount of users per day that we are going to have server overload.
Since there are multiple websites on the servers, I don't know how to tell which site is causing this.
I have enabled Server Status for the server but what it is showing on the processes that are using a lot of CPU doesn't make sense, for example, the stylesheet of one of the sites, or a page that all it does is a redirect...
Is there any way to get better insight into what page of the apache thread/process is causing the processor utilization to spike?
I have recently begun to notice that the CPU usage on the servers behind the load balancer is much higher than expected, (.42,.41,.35) and it appears that a couple of apache processes are causing it, running between 7% and 14% cpu usage, there constantly 1 to 2 of these while the rest of the apache processes are at about 0-4% cpu.
In the past when we had high utilization, it only ever reached about these levels. So I am concerned that when we get back to 10x the amount of users per day that we are going to have server overload.
Since there are multiple websites on the servers, I don't know how to tell which site is causing this.
I have enabled Server Status for the server but what it is showing on the processes that are using a lot of CPU doesn't make sense, for example, the stylesheet of one of the sites, or a page that all it does is a redirect...
Is there any way to get better insight into what page of the apache thread/process is causing the processor utilization to spike?
Expert: gheist replied at 2024-08-11 12:04:46
Since you have shared hosting you ahve all rights to go after insecure wordpress owners (or at least offer them 1% cheaper wordpress virtual instance that you patch)
Author: jrm213jrm213 replied at 2024-08-11 02:15:47
The solution ended up being that we had people attacking certain sites on the server. Even though the attacks were not causing problems with the sites and were as far as I can tell all blocked, they were still causing a good amount of load on the server.
Expert: gheist replied at 2024-08-07 14:51:20
Attacks targed insecure wordpress. If you have no wordpress just disregard them. If you indeed use wordpress - rename those admin files to long random name and force over SSL.
If you have hard time containing CPU usage - evaluate if mod_fcgid + apache-worker is a viable option for you (examples in fcgid documentation talk about using it with php)
If you have hard time containing CPU usage - evaluate if mod_fcgid + apache-worker is a viable option for you (examples in fcgid documentation talk about using it with php)
Accepted Solution
Author: jrm213jrm213 replied at 2024-08-06 05:54:40
The log rotation did not seem to help. I have been slowly tracking things down and have managed to identify a couple of attacks that were occurring that were repeatedly hitting the same valid files on the server, files I would normally expect to see in the logs. It took a while but after sifting through a couple million rows of logs I was able to identify the attacks and stop them with a combination of .htaccess rules and turning off some features of the blogs. It's tough to identify the good from the bad, when in your situation it is normal to have a couple hundred thousand requests from the same IP's daily because they are coming from schools and businesses. So it's normal to see 50,000 post requests to the login script etc.
The files I found that were specifically being targeted were
I am still getting fake posts to the comments on the blogs on a regular basis, even though they are not getting through because we require moderation of all comments and have some anti-spam stuff in place, we are still getting too many, I am unsure how to stop this one since we do want people to comment on our posts... but that is a completely different question.
So even though wordpress was not allowing any of the attacks to actually do anything, no comments were getting through, people were still beating on the server in short waves causing the cpu spikes. Currently things are sitting at a 15 minute average of between .10 and .15 which is more along the lines of what I expect of the system under the expected current load, and I no longer see any apache threads reaching above 10% cpu or if they do, it's only for a second and then they are back to 2-5% usually.
I will continue to monitor the servers more closely, but it appears that my issue was jerks on the internet.
I appreciate everyone's time and help with this issue.
The files I found that were specifically being targeted were
- wp-login.php - someone was trying to brute force attack a user. I denied access to this page via .htaccess ruleon the blogs that we don't allow users to register on, and added an environment check to allow our work IP Address to access it.
- xmlrpc.php - I don't know what they were trying to do with this but I deleted this file from the blogs
- I also edited the wp-config.php and disabled wp-cron (I manually update the blogs and plugins, and we don't schedule posts, so I think that should be fine.) I don't know if this was a problem on my machine but I read about it being used as an exploit so figured I would disable it now.
I am still getting fake posts to the comments on the blogs on a regular basis, even though they are not getting through because we require moderation of all comments and have some anti-spam stuff in place, we are still getting too many, I am unsure how to stop this one since we do want people to comment on our posts... but that is a completely different question.
So even though wordpress was not allowing any of the attacks to actually do anything, no comments were getting through, people were still beating on the server in short waves causing the cpu spikes. Currently things are sitting at a 15 minute average of between .10 and .15 which is more along the lines of what I expect of the system under the expected current load, and I no longer see any apache threads reaching above 10% cpu or if they do, it's only for a second and then they are back to 2-5% usually.
I will continue to monitor the servers more closely, but it appears that my issue was jerks on the internet.
I appreciate everyone's time and help with this issue.
Expert: gheist replied at 2024-08-01 04:21:55
Did you manage with log rotation? is it better now?
Expert: gheist replied at 2024-07-28 13:14:46
Lets wait for 24h to see if log rotation solves the problem.
Author: jrm213jrm213 replied at 2024-07-28 13:11:20
So you guys think the problem might just be it's end of month and the log is big? I will be honest, I didn't set the log rotation up so I have no idea how to change it. I am guessing it is maybe as easy as moving it from cron.monthly to cron.weekly? If so will it still keep a years worth or just 12 weeks? I guess that is neither here nor there at the moment.
The logs are actually all in their own directories specific to each site.
The logs are actually all in their own directories specific to each site.
Author: jrm213jrm213 replied at 2024-07-28 13:07:22
@gheist
Yes and no on mod_jk. It was used for a few of our legacy sites, until about a month ago when we moved those sites to their own server. I don't believe anything is using it on these servers anymore.
I am not sure how to convert to apache-worker, mod_fcgid or php-cgi
What is the benefit of making those changes.
We do rotate the logs, monthly and we keep a years worth of logs.
Yes and no on mod_jk. It was used for a few of our legacy sites, until about a month ago when we moved those sites to their own server. I don't believe anything is using it on these servers anymore.
I am not sure how to convert to apache-worker, mod_fcgid or php-cgi
What is the benefit of making those changes.
We do rotate the logs, monthly and we keep a years worth of logs.
Expert: gheist replied at 2024-07-28 12:04:30
You need cron in addition to logrotate too.
Expert: mugojava replied at 2024-07-28 11:06:44
I agree with gheist, try rotating those logs so apache is not trying to append to a 6G file. If, you see nothing else in your access logs or other indications there's something mischievous going on.
Expert: gheist replied at 2024-07-28 11:00:28
You must rotate logs. I think in debian if you install logrotate package logs are rotated next night.
Assisted Solution
Expert: gheist replied at 2024-07-28 10:54:35
125 points EXCELLENT
Apache should be
2.2.16-6+squeeze12 and not older.
Do you use mod_jk at all??? It can be replaced by mod_proxy in apache 2.2
Do you think you have time to convert apache to apache-worker and mod_fcgid and php-cgi?
2.2.16-6+squeeze12 and not older.
Do you use mod_jk at all??? It can be replaced by mod_proxy in apache 2.2
Do you think you have time to convert apache to apache-worker and mod_fcgid and php-cgi?
Assisted Solution
Expert: mugojava replied at 2024-07-28 10:54:01
175 points EXCELLENT
One easy method I use to find out which site is being slammed (if that is the case), and I'll assume your log files are in
/var/log/httpd
cd into your web log directly, and do an
ls -ltra
This will list everything in by modification time, and you can see which log is being written to continually.
(drop the -r if you would rather have the newest at top. I prefer bottom)
You can also do a
watch "ls -ltra"
to watch the list with a default 2 second update.
Then tail that puppy with a -f ollow to watch what and how the culprit his hitting it -
tail web-log-to-watch-access.log -f
/var/log/httpd
cd into your web log directly, and do an
ls -ltra
This will list everything in by modification time, and you can see which log is being written to continually.
(drop the -r if you would rather have the newest at top. I prefer bottom)
You can also do a
watch "ls -ltra"
to watch the list with a default 2 second update.
Then tail that puppy with a -f ollow to watch what and how the culprit his hitting it -
tail web-log-to-watch-access.log -f
Author: jrm213jrm213 replied at 2024-07-28 10:50:50
It is Apache that has the high cpu usage, I just don't know why. I am not seeing anything strange in the access or error logs.
Author: jrm213jrm213 replied at 2024-07-28 10:43:45
Hello, here is some more information
@mugojava
Server Version: Apache/2.2.16 (Debian) mod_jk/1.2.30 PHP/5.3.3-7+squeeze19 with Suhosin-Patch
There are 4 CPU's [0-3]
@mugojava
Server Version: Apache/2.2.16 (Debian) mod_jk/1.2.30 PHP/5.3.3-7+squeeze19 with Suhosin-Patch
There are 4 CPU's [0-3]
processor : 0vendor_id : AuthenticAMDcpu family : 16model : 4model name : Quad-Core AMD Opteron(tm) Processor 2374 HEstepping : 2cpu MHz : 97529.786cache size : 512 KBfpu : yesfpu_exception : yescpuid level : 5wp : yesflags : fpu de tsc msr pae cx8 cmov pat clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc pni cx16 popcnt lahf_lm cmp_legacy extapic cr8_legacy abm sse4a misalignsse 3dnowprefetchbogomips : 4400.17TLB size : 1024 4K pagesclflush size : 64cache_alignment : 64address sizes : 48 bits physical, 48 bits virtualpower management: ts ttp tm stc 100mhzsteps hwpstate 1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:
I will look a the logs, they are huge, access log is currently 6gb. Error log is only 175kb.
@gheist
The stylesheet is not dynamic, it is just a .css file.
The redirect page, basically is a page that sets some location cookies and redirects back to the site or if the user is from specific states it redirects them to a different website.
Assisted Solution
Expert: duncanb7 replied at 2024-07-28 10:09:44
75 points EXCELLENT
And with those commands to compose shell script to do looping or monitor whole system that is better than try the third-party software
Duncan
Duncan
Assisted Solution
Expert: duncanb7 replied at 2024-07-28 10:03:08
125 points EXCELLENT
Besides buying commerical software, i think this is 25 good linux command to monitor server performance at this site, http://www.tecmint.com/command-line-tools-to-monitor-linux-performance/
Hope understand your question completely. If not, pls pt it out
Duncan
Hope understand your question completely. If not, pls pt it out
Duncan
Expert: gheist replied at 2024-07-28 09:54:22
Most commonly it is PHP and/or DEFLATE
Can you detail your setup a bit more?
Which mpm?
Which apache version?
Distribution version?
Disable server status. There is a recent security bug in it to patch... It will not help at all.
Stylesheet? - is it dynamic?
Redirect page? - maybe you add google rank to some XXX site?
Can you detail your setup a bit more?
Which mpm?
Which apache version?
Distribution version?
Disable server status. There is a recent security bug in it to patch... It will not help at all.
Stylesheet? - is it dynamic?
Redirect page? - maybe you add google rank to some XXX site?
Expert: mugojava replied at 2024-07-28 09:43:35
How many processors to you have? (cat /proc/cpuinfo)
That is the only way to gauge relevance with your "uptime" output.
For instance, your system is maxed if you have 4 cores, but only 1/2 maxed if you have 8, based on your current cpu usage.
You can to a "top" and list things by mem / cpu, etc. to find out where the hogs are.
If it is apache, then this is most likely a symptom of someone scanning or trying to exploit your server in some way, especially if you have not changed any code. Watching your web logs will give you insight as to who and how it's being hit.
That is the only way to gauge relevance with your "uptime" output.
For instance, your system is maxed if you have 4 cores, but only 1/2 maxed if you have 8, based on your current cpu usage.
You can to a "top" and list things by mem / cpu, etc. to find out where the hogs are.
If it is apache, then this is most likely a symptom of someone scanning or trying to exploit your server in some way, especially if you have not changed any code. Watching your web logs will give you insight as to who and how it's being hit.
