How to open ssh 22/TCP port using ufw on Ubuntu/Debian Linux

To open port 22 (the default SSH port) for incoming traffic using ufw on Ubuntu/Debian Linux, use the following command:

sudo ufw allow 22/tcp

You can verify that the port is open by checking the status of ufw:

sudo ufw status

You should see output similar to the following, indicating that port 22 is open for incoming traffic:

Status: activen

To Action From
n-- ------ ----
22/tcp ALLOW Anywhere