linux常用命令

1.查看端口占用

#lsof -i:80
COMMAND    PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
nginx     3103  root   11u  IPv4  23249      0t0  TCP *:http (LISTEN)
nginx     3103  root   12u  IPv6  23250      0t0  TCP *:http (LISTEN)
nginx     3163 nginx   11u  IPv4  23249      0t0  TCP *:http (LISTEN)
nginx     3163 nginx   12u  IPv6  23250      0t0  TCP *:http (LISTEN)

2.查看进程PID对应文件占用

cd /proc/$PID/fd
ls -l