Follow these directions to assign a hostname to a Cisco router or switch in IOS.
Note: Adding "privilege 15" gives the user administrator rights (example: username User1 privilege 15 password bv5gh4ns2)
Use the show users to verify that the user has been added.
The reload command can be used to return the router or switch to the configuration it had before any changes were made.
To ensure these changes remain saved if the router or switch is restarted, save the changes to the startup-config. Type copy running-config startup-config and press enter. This saves to NVRAM. To ensure the startup-config contains the new user, use the show startup-config command. It is also possible to save the changes to flash using the copy startup-config flash command. Then use the show flash command, and the startup-config file should be listed.