w — show Who is doing What
w is part of the procps package. w shows information about the users currently on the machine, and their processes. The header shows, in this order, the current time, Uptime, no. of current users, & load averages for the past 1, 5, and 15 minutes.
JCPU — The time used by all processes attached to the tty. It does not include past background jobs, but does include currently running background jobs.
PCPU — The time used by the current process, named in the “WHAT”.
$ w — Show header, users and processes Information.
$ w foo — Show information about foo (user) only.
$ w -h — Don’t show header info.
$ w -f — Don’t show FROM (remote hostname) field.
$ w -s — Short format. Don’t show login, JCPU and PCPU times.
$ w -u — Ignores the username while figuring out the current process and CPU times of the current tty.
Read : man w
Atlast my exams were over and I am now free for a week. I think I will resume my blogging and try to write new articles.