Basic Command of Router & Switch...

Router & Switch Administrator Function:

Configure Console Password:
Router(config)#hostname RBS
RBS(config)#line console 0
RBS(config-line)#password 123
RBS(config-line)#login
RBS(config-line)#exit
RBS(config)#do write

Configure Auxiliary Password:
Router(config)#hostname RBS
RBS(config)#line aux 0
RBS(config-line)#password 12345
RBS(config-line)#login
RBS(config-line)#exit
RBS(config)#do write

Configure Virtual terminal Password:
Router(config)#hostname RBS
RBS(config)#line vty 0 4
RBS(config-line)#password 12345
RBS(config-line)#login
RBS(config-line)#exit
RBS(config)#do write

Configure Enable & Secret Password:
Router(config)#enable password cisco
Router(config)#enable secret rbs@123

Encrypt Password:
Router(config)#service password-encryption

Set Banner:

Router(config)#banner MOTD "Happy Birth Day"