**5.** We shall test public key authentication from the client computer. Use same user account which you previously used for executing `ssh-keygen` command on the client computer. The client computer user should be able to login into SSH server without a password.
**5.** We shall test public key authentication from the client computer. Use same user account which you previously used for executing `ssh-keygen` command on the client computer. The client computer user should be able to login into SSH server without a password.
**EXTRA: Modifying welcome banner**
### EXTRA: Modifying welcome banner
Let's modify default Ubuntu login/SSH banner message by executing the following bash script:
Let's modify default Ubuntu login/SSH banner message by executing the following bash script: