Specifications

Using the Command-Line Interface in Cisco IOS Software
Using the CLI
xxxix
The command history feature is enabled by default. To disable this feature for a terminal session,
issue the terminal no history command in user EXEC or privileged EXEC mode or the no history
command in line configuration mode.
Abbreviating Commands
Typing a complete command name is not always required for the command to execute. The CLI
recognizes an abbreviated command when the abbreviation contains enough characters to uniquely
identify the command. For example, the show version command can be abbreviated as sh ver. It cannot
be abbreviated as s ver because s could mean show, set, or systat. The sh v abbreviation also is not valid
because the show command has vrrp as a keyword in addition to version. (Command and keyword
examples are from Cisco IOS Release 12.4(13)T.)
Using Aliases for CLI Commands
To save time and the repetition of entering the same command multiple times, you can use a command
alias. An alias can be configured to do anything that can be done at the command line, but an alias cannot
move between modes, type in passwords, or perform any interactive functions.
Table 6 shows the default command aliases.
To create a command alias, issue the alias command in global configuration mode. The syntax of the
command is alias mode command-alias original-command. Following are some examples:
• Router(config)# alias exec prt partition—privileged EXEC mode
• Router(config)# alias configure sb source-bridge—global configuration mode
• Router(config)# alias interface rl rate-limit—interface configuration mode
To view both default and user-created aliases, issue the show alias command.
For more information about the alias command, see
http://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_a1.html.
Table 6 Default Command Aliases
Command Alias Original Command
h help
lo logout
p ping
s show
u or un undebug
w where