Birmingham mumbai

Issuing commands with OpenSSH
After you've installed the 
openssh-server
 package on your target machine (the one 
you want to control remotely), you'll need to start it if it hasn't been already. By 
default, Ubuntu's 
openssh-server
 package is automatically configured to start and 
become enabled once installed. Just as we've done earlier, you can verify that the 
required service is running with the following command:
systemctl status ssh 
If OpenSSH is running as a daemon on your server, you should see output that tells 
you that it's 
active (running)
. If not, you can start it with the following command:
sudo systemctl start ssh 
If the output of the 
systemctl status ssh
 command shows that the daemon is 
disabled (meaning it doesn't start up automatically when the server boots), you can 
enable it with the following command:
sudo systemctl enable ssh 
With the OpenSSH server started and running, your server should now be listening 
for connections. To verify this, use the following command to list listening ports, 
restricting the output to SSH:
sudo ss -tunlp |grep ssh 

---

Connecting to Networks