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Cisco ASA 5500 Series Configuration Guide using the CLI
AppendixA Using the Command-Line Interface
Command Completion
Command Completion
To complete a command or keyword after entering a partial string, press the Tab key. The ASA only
completes the command or keyword if the partial string matches only one command or keyword. For
example, if you enter s and press the Tab key, the ASA does not complete the command because it
matches more than one command. However, if you enter dis, the Tab key completes the disable
command.
Command Help
Help information is available from the command line by entering the following commands:
•help command_name
Shows help for the specific command.
•command_name ?
Shows a list of arguments available.
•string? (no space)
Lists the possible commands that start with the string.
•? and +?
Lists all commands available. If you enter ?, the ASA shows only commands available for the
current mode. To show all commands available, including those for lower modes, enter +?.
Note If you want to include a question mark (?) in a command string, you must press Ctrl-V before typing the
question mark so that you do not inadvertently invoke CLI help.
Filtering show Command Output
You can use the vertical bar (|) with any show command and include a filter option and filtering
expression. The filtering is performed by matching each output line with a regular expression, similar to
Cisco IOS software. By selecting different filter options you can include or exclude all output that
matches the expression. You can also display all output beginning with the line that matches the
expression.
The syntax for using filtering options with the show command is as follows:
hostname# show command | {include | exclude | begin | grep [-v]} regexp
In this command string, the first vertical bar (|) is the operator and must be included in the command.
This operator directs the output of the show command to the filter. In the syntax diagram, the other
vertical bars (|) indicate alternative options and are not part of the command.
The include option includes all output lines that match the regular expression. The grep option without
-v has the same effect. The exclude option excludes all output lines that match the regular expression.
The grep option with -v has the same effect. The begin option shows all the output lines starting with
the line that matches the regular expression.