How to close the port number occupied by the process under linux

1 netstat -nlp View the service that occupies the port number.

2 the process of finding the port number

3 found the process id.

4 kill it

This program can be completed bit by bit:

1 View services that occupy port numbers.

[root@aslibra root]# netstat -nlp

Active Internet connection (server only)

Proto Recv-Q Send-Q local address external address status PID/ program name

TCP 0 0 0 0 0 0 0:3306 0 0 0 0 0:* List EN 23946/

TCP 0 0 0 0 0 0 0:3307 0 0 0 0 0:* List EN 127 1 1/

TCP 0 0 0 0 0 0 0 0:80 0 0 0 0 0:* List EN 3936/stat -nlp | grep :3306

TCP 0 0 0 0 0 0 0:3306 0 0 0 0 0:* List EN 23946/

Now take out one line and it will be easy. Filter it again, divide it with awk, and take out one of them.

3 Read out the port number

[root @ as Libra root]# netstat-NLP | grep:3306 | awk“{ print $ 7 }”

23946/

It means to take the seventh field, which is separated by tabs by default. I have read it out, but I still have to get it before the number/

4 Just take the number before/,and you can still use awk here.

[root @ as Libra root]# netstat-NLP | grep:3306 | awk“{ print $ 7 }”| awk-F "/“{ print $ 1 }”

23946

It means to divide/sign, and take the first part.

Then pass this number to kill.

The kill command cannot continue processing after the pipe symbol, it will cause an error.

[root @ as Libra root]# netstat-NLP | grep:3306 | awk“{ print $ 7 }”| awk-F "/“{ print $ 1 }”| kill

Kill: usage: kill [-s sigspec |-n signum |-sigspec] [PID | job] ... or kill -l [sigspec]

Need to use the "[']" operator, it can execute a statement, this statement can be executed like this:

kill[']netstat-NLP | grep:3306 | awk“{ print $ 7 }”| awk-F "/“{ print $ 1 }”[']