check open ports (both ipv4 and ipv6)

lsof -i
This option selects the listing of all Internet and x.25 (HP-UX) network files.
Sample Output
COMMAND     PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
dhclient3   817     root    5u  IPv4   3745      0t0  UDP *:bootpc 
sshd       1014     root    3u  IPv4   4770      0t0  TCP *:ssh (LISTEN)
sshd       1014     root    4u  IPv6   4772      0t0  TCP *:ssh (LISTEN)
postgres   1117 postgres    3u  IPv6   5608      0t0  TCP localhost:7175 (LISTEN)
postgres   1117 postgres    4u  IPv4   5609      0t0  TCP localhost:7175 (LISTEN)
postgres   1117 postgres    6u  IPv6   5622      0t0  UDP localhost:56982->localhost:56982 
postgres   1487 postgres    6u  IPv6   5622      0t0  UDP localhost:56982->localhost:56982 
postgres   1488 postgres    6u  IPv6   5622      0t0  UDP localhost:56982->localhost:56982 
postgres   1489 postgres    6u  IPv6   5622      0t0  UDP localhost:56982->localhost:56982 
postgres   1490 postgres    6u  IPv6   5622      0t0  UDP localhost:56982->localhost:56982 
cupsd      1539     root    5u  IPv6   5710      0t0  TCP localhost:ipp (LISTEN)
cupsd      1539     root    6u  IPv4   5711      0t0  TCP localhost:ipp (LISTEN)
sshd      27689     root    3r  IPv4  80824      0t0  TCP 172.16.221.137:ssh->vayu:59742 (ESTABLISHED)
sshd      27689     root    8u  IPv6  80950      0t0  TCP localhost:6010 (LISTEN)
sshd      27689     root    9u  IPv4  80951      0t0  TCP localhost:6010 (LISTEN)

-1
By: shsingh
2011-10-03 02:06:30

5 Alternatives + Submit Alt

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rahimhh21 · 81 weeks and 3 days ago
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pugpuppies95 · 34 weeks and 2 days ago

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