====== Check Memory Usage  ======
The**free** command displays the total amount of free and used physical and swap memory in the system, as well as the buffers used by the kernel.<br />
Display free memory size in MB:
<file>
free -m
</file>
Displays a line containing the totals memory in MB:
<file>
free -t -m
</file>
The**vmstat** command reports information about processes, memory, paging, block IO, traps, and CPU activity.
<file>
vmstat
</file>
The**top** command which provides a dynamic real-time view of a running system.
<file>
top
</file>
Press**SHIFT+M** to sort on memory utilization.<br />
Press**z** to colorize.<br />
Press**1** to see multiple CPU's.<br />
Press**q** to quit.

For more help type ' _command//--help' or 'man _command//'

-- FredPettis - 02 Jun 2009