"find Perl TCP servers and clients"

> netstat -Ainet -anp | egrep perl
tcp        1      0 10.36.109.155:45720     10.36.109.155:8082      CLOSE_WAIT  19642/perl   


Process ID 19642 is a Perl process connecting to local port 8082.


Better:



netstat -lnp --tcp | egrep -i perl


"List all Perl servers listening to TCP ports".  The previous command would also give us clients and UDP -- the second command is shorter.