Whats Up Doc

[George Toft]

shadow wrote:
> 
> > The Unix solution is netstat.  Ask netstat for all listening connections
> > like this:
> > $ netstat -a | grep LISTEN
> 
> Since unix treats everything as a file, you could also use lsof like this:
> 
> $ lsof -i
> COMMAND  PID USER   FD   TYPE DEVICE SIZE NODE NAME
> ntpd     183 root    4u  IPv4    274       UDP *:ntp
> ntpd     183 root    5u  IPv4    275       UDP localhost:ntp
> ntpd     183 root    6u  IPv4    276       UDP 192.168.1.149:ntp
> inetd   4603 root    4u  IPv4  26225       UDP *:amanda
> inetd   4603 root    5u  IPv4  26226       TCP *:amandaidx (LISTEN)
> inetd   4603 root    6u  IPv4  26227       TCP *:amidxtape (LISTEN)
> proftpd 4627 root    0u  IPv4  26367       TCP *:ftp (LISTEN)
> exim    4653 root    0u  IPv4  26384       TCP localhost:smtp (LISTEN)
> sshd    9013 root    3u  IPv4  37451       TCP *:ssh (LISTEN)
> sshd    9022 root    4u  IPv4  37477       TCP
> redstone.somewhere.com:ssh->192.168.1.185:4053 (ESTABLISHED)
> 
> --
> Chris Lewis
> shadow@digitalnirvana.com
> ----------------------------------------
> If it compiles, it is good, if it boots up it is perfect.
>        - Linus Torvalds
> ----------------------------------------
> 
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I have noticed that lsof will return different results for root than
unpriv users.  I have not seen this behavior with netstat.

George