[Hampshire] linux for a powermac G3

A friends employer is junking thier "PC's" and he has rescued one.
He asked that I have a look to see if it is any good.

It is an unwiped G3 and I would really like to install linux on it.

1) to remove files and software

2) because linux is "better" :-)

Not being a mac head I have no idea whis ppc distro will provide
a clean and simple desktop for a "newbie" user with that horrible
one button mac mouse :-)

Jacqui