Q :- how to give ip address on interface

R1#show ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            unassigned      YES unset  administratively down down   
FastEthernet0/1            unassigned      YES unset  administratively down down   
Serial1/0                      unassigned      YES unset  administratively down down   
Serial1/1                      unassigned      YES unset  administratively down down   
Serial1/2                      unassigned      YES unset  administratively down down   
Serial1/3                      unassigned      YES unset  administratively down down   
R1#
R1#conf
R1#configure ter
R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#
R1(config)#
R1(config)#
R1(config)#int
R1(config)#interface fa
R1(config)#interface fastEthernet 0/0
R1(config-if)#ip add
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#no shu
R1(config-if)#no shutdown
R1(config-if)#

Q :- how to set login banner on Router

R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#ban
R1(config)#banner mo
R1(config)#banner motd "

Enter TEXT message.  End with the character '"'.
***********************************
 Welcome to my Network blog

***********************************

Username -   Xyz
password -   Xyz

***********************************
"
R1(config)#

Q :- some other command

R1#write                            
Building configuration...
[OK]
R1#
write command use to save the configuration running to startup config

R1(config)#
R1(config)#exit   !! exit command use to exit the mode !!
R1#
*Mar  1 00:10:56.975: %SYS-5-CONFIG_I: Configured from console by console
R1#
R1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#
R1(config)#
R1(config)#ctrl+z
             ^
% Invalid input detected at '^' marker.

R1(config)#
R1(config)#!! ctrl+Z !! for direct exit


 R1#?  !! ? use to help of command !!
Exec commands:
  access-enable        Create a temporary Access-List entry
  access-profile       Apply user-profile to interface
  access-template      Create a temporary Access-List entry
  alps                 ALPS exec commands
  archive              manage archive files
  audio-prompt         load ivr prompt
  auto                 Exec level Automation
  beep                 Blocks Extensible Exchange Protocol commands
  bfe                  For manual emergency modes setting
  call                 Voice call
  ccm-manager          Call Manager Application exec commands
  cd                   Change current directory
  clear                Reset functions
  clock                Manage the system clock
  cns                  CNS agents
  configure            Enter configuration mode
  connect              Open a terminal connection
  copy                 Copy from one file to another
  credential           load the credential info from file system
  crypto               Encryption related commands.
  ct-isdn              Run an ISDN component test command
  more...


 R1#delete flash: !! use to delete flash: !!