How-to Install SSH Server on Linux 

1.- Install with apt-get command on Ubuntu:

sudo apt-get install openssh-server

1.- Install with dnf command on Fedora:

sudo dnf install openssh-server

2.- Enable the ssh service:

sudo systemctl enable sshd

3.- Configure to start the ssh service on boot:

sudo systemctl start sshd

4.- Check that the SSH server is listening on port 22 with the netstat command:

netstat -plant | grep 22

5.- Validate the installed ssh server version:

ssh -V