How to configure SSH alias using config file

SSH alias will be helpful while dealing with multiple systems as there no need to remember all hostnames/ip addresses.

This article explains the steps to configure SSH alias using config file.

Step1: Open default SSH client configuration file "~/.ssh/config".

#vi ~/.ssh/config

Step2: Update the server details to this file in the following format.

Host webserver
    HostName 192.168.10.1
    User root
    IdentityFIle ~/.ssh/Key-file
    Port 22

Host dbserver
    HostName 192.168.10.2
    User root
    IdentityFIle ~/.ssh/Key-file
    Port 22

Here the values Host, Hostname, User, Key-file and Port need to be replaced according to the required environments.

Now we can able to use the aliases for ssh in the following way.

#ssh webserver

#ssh dbserver

Please note that this alias is available only for the current user. If you want to make the aliases available for all users, do the same configurations in /etc/ssh/ssh_config file.

That's all…