Cisco 7604 Configuration Guide - Page 658

Command Help Appendix C Using the Command-Line Interface Command Help Help information is available from the command line by entering the following commands: • help command_name Shows help for the specific command. • help ? Shows commands for which there is help. • 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 FWSM 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 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. Replace regexp with any Cisco IOS regular expression. See The regular expression is not enclosed in quotes or double-quotes, so be careful with trailing white spaces, which will be taken as part of the regular expression. When creating regular expressions, you can use any letter or number that you want to match. In addition, certain keyboard characters have special meaning when used in regular expressions. Table C-2 lists the keyboard characters that have special meaning. Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM C-4 OL-20748-01