Display system information, such as type of machine and operating system.
-a displays all information.
-m displays the hardware type (for example, i586).
-n displays the machine's hostname.
-p displays the processor type (this appears as unknown).
-r displays the operating system release (for example, 2.4.0-0.43.12).
-s displays the operating system name.
-v displays the operating system version (shown as date of compilation).
The uname command displays a variety of information about your machine and the operating system (Linux).