Connect to the server using the following credentials:

Server: bandit.labs.overthewire.org
Port: 2220
Username: bandit13
Password: 8Zjyxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Level Goal is:

The password for the next level is stored in /etc/bandit_pass/bandit14 and can only be read by user bandit14.
For this level, you don’t get the next password, but you get a private SSH key that can be used to log into the next level.
Note: localhost is a hostname that refers to the machine you are working on

If we take a look at the folder contents, we can see the mentioned private SSH key:

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bandit13@bandit:~$ ls
sshkey.private

Now just simply connect to the bandit server (which is the server we are already on) using the private key:

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ssh -i sshkey.private bandit14@localhost -p 22