Question

I would like to know how I could get the number of processes for each user that is currently logged in.

Answer 1

Give this a try:

ps -u "$(echo $(w -h | cut -d ' ' -f1 | sort -u))" o user= | sort | uniq -c | sort -rn

In order to properly handle usernames that may be longer than eight characters, use users instead of w. The latter truncates usernames.

ps -u "$(echo $(printf '%s\n' $(users) | sort -u))" o user= | sort | uniq -c | sort -rn