process answering port 53

[Oliver Grawert]

hi,
Am Donnerstag, den 09.01.2014, 13:24 -0800 schrieb Noah:
> Hi there,
> 
> how can I figure out what process is answering port 53?  bind9-host is 
> installed but is there a command to see the process bound to a 
> particular port?
> 
> lsof -i:53 -t
> netstat -nlp
> 
> root at virt:/etc/init.d# netstat -nlp | grep 53
> unix  2      [ ACC ]     STREAM     LISTENING     2530     2986/master 
>         private/relay
> unix  2      [ ACC ]     STREAM     LISTENING     2533     2986/master 
>         public/showq
> unix  2      [ ACC ]     STREAM     LISTENING     2536     2986/master 
>         private/error
> unix  2      [ ACC ]     STREAM     LISTENING     2539     2986/master 
>         private/retry
> unix  2      [ ACC ]     STREAM     LISTENING     73379    26723/apache2 
>        /var/run/apache2/cgisock.3253
> 
try
netstat -tlpn

(-t only show tcp ports, -l show the ones listened(answered) on, -p show
the process ID)

in the "local Address" column you see the port number behind the colon.
in the last column you see the PID that you can look up with ps (if the
actual program name is not shown behind the slash)

ciao
	oli
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