user processes shell scripts

[nico dreher]

Dear List,

I am looking for commands that show information about the user, that identify the user, 

So far I have collected these examples:

# obtain information about user
finger USERNAME

# show processes running under a certain user
ps -aux | grep USERNAME

# show files that are open and are being written on
lsof | egrep " [0-9]*[wu] *REG" | sort | grep USERNAME

# show cron jobs
crontab -l

What do you use? 

Thanx for contributing.
Nico