lsof
What process use TCP port
lsof -i TCP:13207
What process is using a directory
lsof /path/to/dir
What files a process has open
lsof -p 890
What process use TCP port
lsof -i TCP:13207
What process is using a directory
lsof /path/to/dir
What files a process has open
lsof -p 890