usermod

https://www.tecmint.com/usermod-command-examples/

Add you user to the webserver user group:
sudo usermod -a -G www-data username

Add shell
usermod -s /usr/bin/bash username
usermod -s /usr/bin/git-shell username

Add directory
usermod -d /hime/username username

Options

• -c = We can add comment field for the useraccount.
• -d = To modify the directory for any existing user account.
• -e = Using this option we can make the account expiry in specific period.
• -g = Change the primary group for a User.
• -G = To add a supplementary groups.
• -a = To add anyone of the group to a secondary group.
• -l = To change the login name from tecmint to tecmint_admin.
• -L = To lock the user account. This will lock the password so we can’t use the account.
• -m = moving the contents of the home directory from existing home dir to new dir.
• -p = To Use un-encrypted password for the new password. (NOT Secured).
• -s = Create a Specified shell for new accounts.
• -u = Used to Assigned UID for the user account between 0 to 999.
• -U = To unlock the user accounts. This will remove the password lock and allow us to use the user account.