How to check what ports are listening using the netstat -l command Linux CLI

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This is a quick reference on how to check what ports are listening using the netstat – l command on Linux Based Operating Systems.

1. netstat -l

Proto refers to network protocol either tcp or udp, local address you will see the port that is currently listening and under state it will advise that the port is listening (LISTEN).

root@GNS3-Server:/tmp# netstat -l
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 *:3080                  *:*                     LISTEN
tcp        0      0 *:http                  *:*                     LISTEN
tcp        0      0 192.168.122.1:domain    *:*                     LISTEN
tcp        0      0 *:ssh                   *:*                     LISTEN
tcp        0      0 *:8003                  *:*                     LISTEN
tcp6       0      0 [::]:http               [::]:*                  LISTEN
tcp6       0      0 [::]:ssh                [::]:*                  LISTEN

Thank you for reading and please feel free to leave any feedback.

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