If you are admin or developer you have
encountered ssh in your life. Ssh stands for Secure Shell which let you login
to pc / server remotely and securely. It replaces telnet, rlogin etc… which
does the same but does not provide security.
For ssh to work we need to generate keys using
ssh-keygen command on mac or linux base system. For windows putty or like wise
software is used. In some cases like Amazon keys are provided and we need to
download the same. Keys are used to make connection.
This post shows how to manage multiple ssh keys
on the pc.
Scenario: Being an admin or a developer there are
chances that you need to connect to different servers to perform routine tasks or
other stuff and need to provide respective keys during connection.
Simple way to do this run ssh command like ssh –i
location_of_key firstname.lastname@example.org, a very simple but difficult when you have many keys and many username.
To manage the ssh keys and other details config file
can be created, where we can specify host, user and the key to be used for
Than while connecting the host we can simply type
ssh easyuserfriendly name as configured in the config file.
Usually keys are stored in .ssh directory which is located in home directory in most of MAC or Linux base operating
To manage this we can use config file in .ssh directory which will store all such data. The config file will contain entry for host, hostname, path or location
to the keys file generated using the ssh-key gen command or obtained from remote pc.
Following is the sample config file.
To connect now simply use ssh mysite, it will look in to config file for key location, hostname and user.