ssh to know the load

Is there any ssh command to know the cpu usage of a particual user at a single instant.
Or to know the user who has the highest cpu usage at that instant.

 

yes there is, try htop
http://htop.sourceforge.net/

 

or you could just use the top command which is in there by default

 

You need to run 'top' command after that just hit shift+m, it will sort output by memory.
Orelse, simply you can run 'w' command to see load on the server.

 

try

ps -aux | grep 'username'

just replace the word username with the username you're looking for, and keep the quote marks

edit: the higher user with cpu usage would show if you use the top command, it'll show you the top processes using the cpu time, or try shift+m and it'll show you the top users of server memory.