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tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
...量僵死的连接会浪费许多服务器资源。在众多TCP状态中，最值得 注意的状态有两个：CLOSE_WAIT和TIME_WAIT。
1、LISTENING状态
TCP服务启动后首先处于侦听（LISTENING）状态。
2、ESTABLISHED状态
ESTABLISHED的意思是建立连接。表示两台机...
What does `kill -0 $pid` in a shell script do?
... are concerned about defunct / zombie process status, then you need to use ps, preferably with the --no-headers switch.
#!/bin/ksh
function trim ()
{
echo -n "$1" | tr -d [:space:]
}
function getProcessStatus ()
{
trim $(ps -p $1 -o stat --no-headers)
}
function isZombie ()
{
typeset...
brew install mysql on macOS
...rew Way as Sedorner wrote above:
Remove MySQL completely per The Tech Lab
ps -ax | grep mysql
stop and kill any MySQL processes
sudo rm /usr/local/mysql
sudo rm -rf /usr/local/var/mysql
sudo rm -rf /usr/local/mysql*
sudo rm ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
sudo rm -rf /Library/Start...
How to perform a mysqldump without a password prompt?
...assword.
Very handy for scripting mysql & mysqldump commands.
The steps to achieve this can be found in this link.
Alternatively, you could use the following command:
mysqldump -u [user name] -p[password] [database name] > [dump file]
but be aware that it is inherently insecure, as the ...
Wi-Fi 是什么的缩写 - 程序人生、谈天论地 - 清泛IT论坛，有思想、有深度
...less fidelity，再缩成 Wi-Fi。Interbrand 共提交了十三个方案，最终胜出的（由于我们都知道结局了所以毫无悬念地）是 Wi-Fi。无线以太网兼容性联盟也由此更名为 Wi-Fi 联盟。Wireless Fidelity 的由来下一个问题就来了，既然流传这么广...
从一个开发的角度看负载均衡和LVS - 更多技术 - 清泛网 - 专注C/C++及内核技术
...载均衡设备的任务就是作为应用服务器流量的入口，挑选最合适的一台服务器，将客户端的请求转发给它处理，实现客户端到真实服务端的透明转发。最近几年很火的「云计算」以及分布式架构，本质上也是将后端服务器作为计...
How to convert a Title to a URL slug in jQuery?
...a-z0-9 -]/g, '') // remove invalid chars
.replace(/\s+/g, '-') // collapse whitespace and replace by -
.replace(/-+/g, '-'); // collapse dashes
return str;
};
and try
slug($('#field').val())
original by: http://dense13.com/blog/2009/05/03/converting-string-to-slug-javascript/
EDIT...
Path to Powershell.exe (v 2.0)
...ine installed PowerShell version) shows it's 2.0.
Another option is type $PSVersionTable at the command prompt. If you are running v2.0, the output will be:
Name Value
---- -----
CLRVersion 2.0.50727.4927
BuildVersion ...
Ruby on Rails console is hanging when loading
... bin/spring stop, I received the response Spring is not running. So, I ran ps aux | grep spring, saw 5 spring processes running, and manually killed them, which fixed the problem.
– Ian Taylor
Jan 24 '18 at 19:32
...
What is the best practice for dealing with passwords in git repositories?
...onment variable using:
import os
print(os.environ['your_env_variable'])
PS: be aware that it's probably a bit risky (but it's a quite common practice) https://www.bleepingcomputer.com/news/security/javascript-packages-caught-stealing-environment-variables/
PS2: this dev.to article titled "How to...