Switching User From A sudoer to Bash to Root

Question

On someone's ubuntu VPS I created a user, added them to sudo and logged in. Figuring I didn't need the root password anymore, I got rid of it. Then for whatever reason I felt I needed to go back to root. I type in sudo -s and put in the users password. Then before my command it said something like

bash@name#

Then I could su root.

Just wondering what bash is, how I could switch to it before and I can't on my current vps.

Thanks :D

Answer 1

Bash is Unix shell.

But without giving more information we can only guess what is there behind this behaviour. Relevant would be the line from /etc/passwd about this user (if it is real user) and content of /etc/sudoers.

My theory is that this bash user has UID=0 as root and when you run sudo it is run under this user context (instead of root). But this QA site is not about playing such a games.