How to change the ssh port on Ubuntu 23.04?

Question

How to change the ssh port on Ubuntu 23.04?

root@ubuntu:/home/user# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 23.04
Release:        23.04
Codename:       lunar

Answer 1

In Ubuntu 22 and mostly in Ubuntu 23 if we change ssh port in sshd_config it doesn't work so I figured it out following method

sudo vim /lib/systemd/system/ssh.socket

Change the following parameter to the port of your choice e.g. 1122

ListenStream=1122

Save the file and quit the vim editor with the command wq! and then execute the following commands one by one

This will reload the daemon

sudo systemctl daemon-reload  

To restart the SSH server

sudo systemctl restart ssh     

and if you want to check the port you can check with the following command netstat -ant |grep 6381

in case you you face the error Command 'netstat' not found

you can be installed with: apt install net-tools -y

Answer 2

You also need to change the port inside /etc/ssh/sshd_config, it would be

Port your_port_number