SSH access to Github from multiple accounts

• Generate SSH Keys:

  ssh-keygen  -t rsa -b 4096 -C "email@personal.com" -f ~/.ssh/id_rsa_personal
  ssh-keygen  -t rsa -b 4096 -C "email@work.com" -f ~/.ssh/id_rsa_work
  

  The two commands above generate two key pairs: id_rsa_personal/id_rsa_personal.pub, id_rsa_work/id_rsa_work.pub. 
• Add SSH Keys to your github accounts.
• Add id_rsa_personal.pub to your personal github account:
• Login to your github
• Go to Settings -> Add SSH Keys
• Copy of the content of id_rsa_personal.pub to the key field
• Click Add Key
• Add id_rsa_work.pub to your github account for work:
• Login to your github
• Go to Settings -> Add SSH Keys
• Copy of the content of id_rsa_work.pub to the key field
• Click Add Key
• Create a file: ~/.ssh/config and add:

Host personal
   HostName github.com
   User git
   IdentityFile ~/.ssh/id_rsa_personal

Host work
   HostName github.com
   User git
   IdentityFile ~/.ssh/id_rsa_work
• Update stored identities:

ssh-add -D
ssh-add id_rsa_personal
ssh-add id_rsa_work

• Test

ssh -T personal
Hi githubPersonal! You've successfully authenticated, but GitHub does not provide shell access.
$ ssh -T work
Hi githubWork! You've successfully authenticated, but GitHub does not provide shell access.