


A brief analysis of checking port occupancy and killing in Wind and Linux (with code)
In the previous article "An article explaining common terminal commands in MacOS (with code)", we learned about an article explaining common terminal commands in MacOS. The following article will teach you how to check port occupancy and kill in Wind and Linux. Let's see how to do it.
Port occupancy and Kill(Window & Linux)
Windows use
window
The netstat
-a
displays all connecting and listening ports.-n
Display the address and port number in numerical form.#-o
Displays the owned processID
associated with each connection.
View all port occupancy
netstat -ano
View the PID corresponding to the occupied port 3306
netstat -ano | findstr 3306
View the PID process of the specified port 3306
tasklist | findstr 3306
End the process
Force (/F parameter) to kill all processes with a pid of 12345, including Child process (/T parameter):
taskkill /T /F /PID 12345
Linux
Use
Use netstat
command
-t (tcp)
Display only tcp
related options
-u (ucp)
Display only ucp
related options -n
Refuse to display aliases, convert all numbers that can be displayed into numbers
-l
Only list those in Listen
(listening) Service status
-p
Display the name of the program that establishes the relevant link
See all currently used ports
netstat -nultp
Check the usage of a certain port
netstat -anp |grep 3306
Use the lsof
command
Default : No options,
lsof
lists all open files of active processesCombinations: Options can be combined together, such as
-abc
, But be careful which options require arguments##-a
: the result is ANDed (not ORed)
-l
: Display user
IDin output instead of username
-h
: Get help
-t
: Get only the process
ID-U
: Get the
UNIXsocket address
-F
: Format the output result for other commands. Can be formatted in many ways, such as
-F pcfn(for process
id, command name, file descriptor, file name, and terminated with null)
lsof -i:3306
Commonly used
- ##lsof abc.txt
Display the open file
abc.txt
Process - lsof -i :22
Know what program is running on port
22
- lsof -c abc
Display the files currently opened by the
abc
process - lsof -g gid
Display ownership
gid
Process status ##lsof d /usr/local/ - Display the files opened by the process in the directory
- Same as above, but the directory under the directory will be searched, which takes a longer time
- Display Use
fd
as the process of
4 lsof -i - to display the process status that meets the conditions
- See which files are opened by the process with process number
12
lsof |-r [t] - Control
lsof
to be executed repeatedly, the default is
15srefresh
lsof -r, lsof - will continue to execute forever until an interrupt signal is received
- will continue to execute until no files are displayed
- List the size of open files, if there is no size, leave blank
- List open files with
UID
##Use ps
Command parameters:
a - Display all processes
-a Display the same All programs under the terminal
-A Display all processes
c Display the real name of the process
-N Reverse selection
is equal to "##-e
-A- ”
Display environment variablese
Display the relationship between programsf
Display the tree structure-H
Display the processes of the current terminalr
Display all programs of the current terminalT
All processes of the specified useru
-
Show more detailed information-au
Show all trips that include other users-aux
-C<命令>
列出指定命令的状况--lines<行数>
每页显示的行数--width<字符数>
每页显示的字符数--help
显示帮助信息--version
显示版本显示
查找特定进程
ps -ef|grep ssh
输出:
chuchur@linux:~/share$ ps -ef|grep bash chuchur 9448 79650 0 06:05 pts/4 00:00:00 grep --color=auto bash chuchur 79650 79575 0 03:49 pts/4 00:00:00 bash
通过服务名字查找PID
查找 nginx
和 python
占用情况
ps aux | egrep '(nginx|python)'
输出:
root 951 0.0 0.3 425268 27680 ? Ssl 2020 9:48 /usr/libexec/platform-python -Es /usr/sbin/tuned -l -P root 212828 0.0 0.1 135300 13924 ? Ss 2020 0:00 nginx: master process /usr/sbin/nginx root 2488443 0.0 0.1 164676 14892 ? S Mar06 0:00 nginx: worker process
结束进程
kill
命令参数
-1 (HUP)
:重新加载进程。-9 (KILL)
:杀死一个进程。-15 (TERM)
:正常停止一个进程。-KILL
强制杀死进程
kill -9 65300 #彻底干掉pid为65530的进程 kill -9 $(ps -ef | grep guest) #干掉guest 用户进程 #or kill -u guest
推荐学习:windows教程
The above is the detailed content of A brief analysis of checking port occupancy and killing in Wind and Linux (with code). For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Yes, MySQL can be installed on Windows 7, and although Microsoft has stopped supporting Windows 7, MySQL is still compatible with it. However, the following points should be noted during the installation process: Download the MySQL installer for Windows. Select the appropriate version of MySQL (community or enterprise). Select the appropriate installation directory and character set during the installation process. Set the root user password and keep it properly. Connect to the database for testing. Note the compatibility and security issues on Windows 7, and it is recommended to upgrade to a supported operating system.

The MySQL connection may be due to the following reasons: MySQL service is not started, the firewall intercepts the connection, the port number is incorrect, the user name or password is incorrect, the listening address in my.cnf is improperly configured, etc. The troubleshooting steps include: 1. Check whether the MySQL service is running; 2. Adjust the firewall settings to allow MySQL to listen to port 3306; 3. Confirm that the port number is consistent with the actual port number; 4. Check whether the user name and password are correct; 5. Make sure the bind-address settings in my.cnf are correct.

The solution to MySQL installation error is: 1. Carefully check the system environment to ensure that the MySQL dependency library requirements are met. Different operating systems and version requirements are different; 2. Carefully read the error message and take corresponding measures according to prompts (such as missing library files or insufficient permissions), such as installing dependencies or using sudo commands; 3. If necessary, try to install the source code and carefully check the compilation log, but this requires a certain amount of Linux knowledge and experience. The key to ultimately solving the problem is to carefully check the system environment and error information, and refer to the official documents.

Unable to access MySQL from the terminal may be due to: MySQL service not running; connection command error; insufficient permissions; firewall blocks connection; MySQL configuration file error.

The main reasons for MySQL installation failure are: 1. Permission issues, you need to run as an administrator or use the sudo command; 2. Dependencies are missing, and you need to install relevant development packages; 3. Port conflicts, you need to close the program that occupies port 3306 or modify the configuration file; 4. The installation package is corrupt, you need to download and verify the integrity; 5. The environment variable is incorrectly configured, and the environment variables must be correctly configured according to the operating system. Solve these problems and carefully check each step to successfully install MySQL.

Copy and paste in MySQL includes the following steps: select the data, copy with Ctrl C (Windows) or Cmd C (Mac); right-click at the target location, select Paste or use Ctrl V (Windows) or Cmd V (Mac); the copied data is inserted into the target location, or replace existing data (depending on whether the data already exists at the target location).

Pull vertical guides in Photoshop: Enable ruler view (View > ruler). Hover the mouse over the vertical edge of the ruler, and then the cursor becomes a vertical line with double arrows and hold and drag the mouse to pull out the reference line. Click Delete by dragging the guide, or hovering it into a cross.

VS Code can run on Windows 8, but the experience may not be great. First make sure the system has been updated to the latest patch, then download the VS Code installation package that matches the system architecture and install it as prompted. After installation, be aware that some extensions may be incompatible with Windows 8 and need to look for alternative extensions or use newer Windows systems in a virtual machine. Install the necessary extensions to check whether they work properly. Although VS Code is feasible on Windows 8, it is recommended to upgrade to a newer Windows system for a better development experience and security.
