List Open Ports in Linux

The short answer

In Linux, to get the list of open ports on your local machine, you can use the netstat command as follows:

$ netstat -tuln

Where:

• The -t flag is used to show TCP ports.
• The -u flag is used to show UDP ports.
• The -l flag is used to only show open ports.
• The -n flag is used to show IP addresses and port numbers.

For example:

Proto   Recv-Q   Send-Q   Local Address    Foreign Address   State
tcp       0             0             0.0.0.0:22           0.0.0.0:*                LISTEN
tcp       0             0             127.0.0.1:5432   0.0.0.0:*                LISTEN
udp      0             0             0.0.0.0:68           0.0.0.0:*

Note that the netstat command is available in the net-tools package.

Easily retrieve these commands using Warp's AI Command Suggestions feature

If you’re using Warp as your terminal, you can easily retrieve this command using the Warp AI Command Suggestions feature:

Entering linux list open ports in the AI Command Suggestions will prompt a netstat command that can then quickly be inserted into your shell by doing CMD+ENTER.