查看某个端口被占用的进程

netstat

netstat -pan 可用于查看当前开放的端口和正在进行的网络连接。

$ netstat -pan

查看某端口被哪个进程占用：

$ netstat -pan | grep ":<端口号>"

如：

$ sudo netstat -pan | grep ":80"

可以看到当前80端口被httpd（即Apache Web Server）占用.

# 查看某个端口是否被占用 
$ lsof -i:[端口号]

# e.g.
$ sudo lsof -i:22

$ netstat -at | grep LISTEN

# Or
$ sudo netstat -tulpn | grep LISTEN

$ lsof -i -P | grep -i "listen"

# Or
$ sudo lsof -i -P -n | grep LISTEN

$ netstat -anp | grep <pid>

$ netstat -nltp | grep <pid>

$ kill -9 `lsof -i:8081 | grep LISTEN | awk '{print $2}'`

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