$ kill 0 Terminates all current process except your shell Command: who Description: Lists all users currently on system. Syntax: who [options] [file] Options: Options
What it does
-a
Equivalent to -b -d --login -p -r -t -T -u.
am i
Print the user-name of the invoking user.
-b (boot)
Print time of last system boot.
-d (dead)
Print a list of dead processes.
-i (idle)
Include idle times. An idle time of indicates activity within the last minute; one of old indicates no activity in more than a day.
-l (login)
Print list of system login processes.
-m
Same as who am i.
-p
Print active processes spawned by init.
-q (count)
"Quick." Display only the user-names and total number of users.
-r (run level)
Print the current run level.
Command: who am i Description: Reports the details about the command user. Syntax: who am I Command: who am i Description: Reports the user name of the command user. Syntax: whoami