Ever find yourself on another Linux system wondering why is this system so slow !
I wonder what RAM is installed I hear you thinking, the answer is the ‘free’ command.
This will show you the amount of free and used memory installed in your machine with the option to use the following switches:
-b this will display the output in bytes
-k again in kilobytes
-h in human readable form
-t will give you column totals
-s <variable> will repeat the command every <var> seconds