The uname command run in LPAR

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Use the uname command to obtain information about the system in relation to the LPAR.

> uname -L 
-1 NULL
The "-1" indicates that the system is not running with any logical partitions, but is running in full system partition mode.
The following example demonstrates how the uname command provides the partition number and the partition name as managed by the HMC: 
 > uname -L 
3 Web Server
Knowing that the application is running in an LPAR can be helpful when you are assessing slight performance differences.