“ps aux” is used to provide information about the currently running processes. To show the currently running processes and sort it by the memory usage, you may use this command :
ps aux | sort -nk +4 | tail -n 10
ps = report a snapshot of the current processes.
a = show processes for all users
u = display the process’s user/owner
x = also show processes not attached to a terminal
This command sort the output of ps and sort it by top 10 process that takes the memory.