Getting Started
Introduction
lsof meaning LiSt Open Files is used to find out which files are open by which process
$ lsof
$ sudo lsof -u root
Port-specific
$ lsof -i :8080
$ lsof -i :80 -i :22
$ lsof -i TCP:22
$ lsof -i TCP:1-1024
$ lsof -i UDP
$ lsof -i @192.168.1.5
Process-specific
$ lsof -c mysql
$ lsof -c java
$ lsof -c ssh
$ lsof -c nginx
$ lsof -c ssh -c httpd
User-specific
$ lsof -u www-data
$ lsof -u www-data -u ubuntu
$ lsof -i -u ^root # Except certain user
Network-specific
$ lsof -i 4 # IPv4 only
$ lsof -i 6 # IPv6 only
PID-specific
$ lsof -p 1753
$ lsof -p ^3 # Except certain pids
Filename-specific
$ lsof /var/log/messages
$ lsof /etc/passwd
Directory-specific
$ lsof +D /var/log # Within a directory
Kill
$ kill -9 `lsof -t -u apache`
$ kill -9 $(lsof -t -i :8080)