1、查看指定进程名打开的文件
lsof -c mysqld
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
mysqld_sa 1397 root cwd DIR 253,0 213 34667033 /usr/local/mysql
mysqld_sa 1397 root rtd DIR 253,0 4096 64 /
mysqld_sa 1397 root txt REG 253,0 964536 1791 /usr/bin/bash
/usr/lib64/ld-2.17.so
2、显示指定的进程号所打开的文件
lsof -p 4059
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
dnsmasq 4059 nobody cwd DIR 253,0 4096 64 /
dnsmasq 4059 nobody rtd DIR 253,0 4096 64 /
dnsmasq 4059 nobody txt REG 253,0 348968 37500761 /usr/sbin/dnsmasq
dnsmasq 4059 nobody mem REG 253,0 61560 33587716 /usr/lib64/libnss_files-2.17.so
3、查看某个端口都有哪些进程
lsof -i:80
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nginx 17824 nginx 9u IPv4 13648071 0t0 TCP *:http (LISTEN)
nginx 32430 root 9u IPv4 13648071 0t0 TCP *:http (LISTEN)
