The set system host-name command defines the name of the device, as
displayed (among other places) in the command prompt. For example:
marios@juniper> configure
marios@juniper# set system host-name router-4
marios@juniper# commit
commit complete
marios@router-4#
Cisco Equivalent
The Cisco equivalent of the set system host-name command is:
cisco# hostname router-5
See also
hostname, the Cisco equivalent