


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
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