Check whether the user is in group wheel before running any sudo command

[skewballfox]

I want to suggest some general feature

On linux, Topgrade should check whether the current user is in the wheel group prior to prompting for the sudo password. If they aren't, don't prompt them for the sudo password (since they don't have one), and don't run any sudo dependent upgrade step

[SteveLauC]

should check whether the current user is in the wheel group prior to prompting for the sudo password

Makes sense

IIRC, redhat distros like Fedora use group wheel, but Debian-based distros use group sudo, not sure about the cases in other distros.