Filtering Command Output

For operational and configuration commands that display output, such as the show commands, you can filter the output. When you display help about these commands, one of the options listed is |, called a pipe, which allows you to filter the command output. For example:

user@host> show configuration ?

Possible completions:

    <[Enter]>                Execute this command

    |                Pipe through a command

user@host> show configuration | ? 

Possible completions:

    count                Count occurrences

    except                Show only text that does not match a pattern

    find                Search for the first occurrence of a pattern

    hold                Hold text without exiting the ----More--- prompt

    last                Show the specified number of lines from the end of the output

    match                Show only text that matches a pattern

    no-more                Don't paginate output

    resolve                Resolve IP addresses

    save                Save output text to a file

    trim                Trim specified number of columns from the start line

In configuration mode, two additional filters appear, display and compare:

[edit]

user@host # show | ? 

Possible completions:

    compare                Compare configuration changes with a prior version

    count                Count occurrences

    display                Display additional configuration information

    except                Show only text that does not match a pattern

    find                Search for the first occurrence of a pattern

    hold                Hold text without exiting the ----More--- prompt

    last                Show specified number of lines from the end of the output

    match                Show only text that matches a pattern

    no-more                Don't paginate output

    resolve                Resolve IP addresses

    save                Save output text to a file

    trim                Trim specified number of columns from the start line

The following filtering operations are available:

• Placing Command Output in a File
• Searching for a String in the Output
• Comparing Configuration Changes with a Prior Version
• Counting the Number of Lines in the Output
• Displaying All Output at Once
• Displaying the Lines You Want to View from the End of the Output
• Retaining the Output After the Last Screen
• Displaying Additional Information About the Configuration
• Filtering Command Output Multiple Times