Create a temporary WHM session using the command line
It's a common security practice to install the SSH key of a user who you want to allow ssh access to your server. On a cPanel server where you may need to access the WHM this becomes an issue since logging into the WHM usually requires you to know the root password. Luckily there is a simple solution to this issue! You can create a temporary session using the command line that will allow you to log into the WHM without knowing the root password.
Generating a temporary WHM session
We will use the whmapi1 command line utility to create a temporary WHM session that we can use to access the WebHostManager without knowing the root password.
root@host [~]# /usr/local/cpanel/bin/whmapi1 create_user_session user=root service=whostmgrd
--- data: cp_security_token: /cpsess5781906767 expires: '1548288309' service: whostmgrd session: root:ZnPGau2SgcjS5C9v:create_user_session,5b6ce9a7d0d7b3c53e5ef3f3545189c7 url: https://host.domain.tld:2087/cpsess5781906767/login/?session=root%3aZnPGau2SgcjS5C9v%3acreate_user_session%2c5b6ce9a7d0d7b3c53e5ef3f3545189c7 metadata: command: create_user_session reason: Created session result: 1 version: 1
The important part of the response is
url: https://host.domain.tld.tld:2087/cpsess5781906767/login/?session=root%3aZnPGau2SgcjS5C9v%3acreate_user_session%2c5b6ce9a7d0d7b3c53e5ef3f3545189c7Copy the URL and paste it into your browser and you will be automatically logged into the WHM without needing the root password.