how to change listening port in ubuntu
vi /etc/ssh/sshd_config
# What ports, IPs and protocols we listen for can change here
Port 22
sudo systemctl restart sshd
how to change listening port in centos
vi /etc/ssh/sshd_config
you can disable port 22 and create your own ssh port in config file as below
Port 2242 #Port 22
sudo service sshd restart