come utilizzare netstat su una porta specifica in Linux

Puoi usare

netstat -pnlt | grep ':portno'

un'altra opzione, puoi usare lo strumento nmap per controllare le porte aperte sul server

nmap -sT -O localhost

Uscita

Starting nmap 3.55 ( http://www.insecure.org/nmap/ ) at 2004-09-24 13:49 EDT
Interesting ports on localhost.localdomain (127.0.0.1):
(The 1653 ports scanned but not shown below are in state: closed)
PORT      STATE SERVICE
22/tcp    open  ssh 
25/tcp    open  smtp
111/tcp   open  rpcbind
Device type: general purpose

Netstat Esempio :

[[email protected] ~]# netstat -pnlt | grep ':80'
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name 
tcp        0      0 :::80                       :::*                        LISTEN      1164/httpd          

usa netstat -anp | grep portNumber

Penso netstat -nat | grep port | grep LISTEN dovrebbe funzionare.