The focus command will set the specified object in focus and change the prompt to reflect this. This allows you to enter a command that applies to the focus, instead of having to type the entire object name each time.
If you set the focus to /c0/u0, the prompt changes to reflect that, and you only have to type
show. The concept is similar to being in a particular location in a file system and requesting a listing of the current directory.
object can have the following forms:
/cx/ux specifies the fully qualified URI (Universal Resource Identifier) of an object on controller
cx, unit
ux.
.. specifies one level up (the parent object).
./object specifies the next level of the object.
/c0/bbu specifies a relative path with respect to the current focused hostname.