How to use two github account on the same computer?

Step 1 – How to generate a ssh key pair?
$ ssh-keygen -t rsa -C “devops@RajeshKumar.xyz”

Step 2 – Upload 2 different public key in 2 github accounts.

Step 3 – Lets say, the github account name is myaccount1 or myaccount2 when pushing to GitHub, you will need to create aliases for git@github.com in ~/.ssh/config, such as:

Host github-myaccount1
    User git
    Hostname github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_dsa-myaccount.pub

Host github-myaccount2
    User git
    Hostname github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_dsa-myaccount2.pub

How to validate which user is set?
ssh -T git@github.com