How to avoid Enter passphrase for key for Git

While using git, it is annoying to type a password or passphrase when there are frequent commits/pushes.

The following steps prevent users from typing passphrases:

1. Start ssh-agent

   $ eval `ssh-agent -s`
   

2. Add your private key using ssh-add

   $ ssh-add ~/.ssh/id_rsa
   
   Enter passphrase for /home/user/.ssh/id_rsa_key:
   Identity added: /home/user/.ssh/id_rsa_key
   (/home/user/.ssh/id_rsa_key)