It is. That’s also part of a two side problem :
- The user is named ubuntu, which makes little sense on other distros and causes confusion.
- The ubuntu user has its home directory in /home which is badly aligned with systems that for example have ldap or nfs home directories or autofs.
Introducing the ‘juju’ user with a home directory in let’s say under: /usr/local/juju-home would resolve those issues.