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	Submitted by: lvo
coolcommand lsof - how to list open files
Description To list all open files: # lsof To list all open files on a device: # lsof /dev/hd4 To see which tcp ports are listening on a server for a specific process id: # lsof -p pid \| grep -i tcp To see listing of files open for a specific ip or port: # lsof -i :[hostname\|ip address][:service\|port] Exemple to find who is listening on port 18011: # netstat -an \| grep 18011 \| grep LIST tcp4 0 0 172.26.25.167.18011 207.96.246.57.53445 ESTABLISHED tcp4 0 0 .18011 .* LISTEN # lsof -i:18011 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME swora81 144574 root 6u IPv4 0x71910adc 0t0 TCP *:SL_18011 (LISTEN) swora81 144574 root 11u IPv4 0x72022adc 0t0 TCP server1:SL_18011->server2:53445 (ESTABLISHED) oracle 711808 daemon 11u IPv4 0x72022adc 0t0 TCP server1:SL_18011->server2:53445 (ESTABLISHED) oracle 711808 daemon 21u IPv4 0x7244dadc 0t0 TCP server1:SL_18011->server2:53409 (CLOSE_WAIT)
Example lsof -p 12000 \| grep -i tcp

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