Basic Lab Overview

This lab will introduce the Cisco Internetwork Operating System (IOS) command line interface (CLI).  You will need to logon to a router and become familiar with the different levels of access on the router.  You will also become familiar with the commands available to you in each mode (user or privileged) and the router help facility, history, and editing features.

User vs. Privileged Mode

User mode is indicated with the '>' next to the router name.  You can look at settings but can not make changes from user mode.  In Privilege mode (indicated by the '#', you can do anything.  To get into privilege mode the keyword is ENABLE.  
Router>
Router>enable
Password:
Router#

HELP

To view all commands available from this mode type: ?  and press: enter This will give you the list of all available commands for the router in your current mode. You can also use the question mark after you have started typing a command.  For example if you want to use a show command but you do not remember which one it it use show ? this will output all commands that you can use with the show command.

r1#show ?
access-expression List access expression
access-lists List access lists
backup Backup status
cdp CDP information
clock Display the system clock
cls DLC user information
compress Show compression statistics
configuration Contents of Non-Volatile memory
--More--

Configuration Mode

From privilege mode you can enter configuration mode by typing CONFIG T  you can exit configuration mode type type END or <CTL>+z
Router#config t
Router(config)#end

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