Vyatta Network OS Documentation

Learn how to install, configure and operate the Vyatta NOS, which helps drive our virtual networking & physical platforms portfolio.

Filtering command output

An overview of filter the command output and the related keystrokes.

The vRouter can pipe the output of commands into selected operating system shell commands to filter what is displayed on the console. Commands are piped into the filters by using the pipe, or vertical bar, operator (|).

Table 1. pipe filter commands
Type this: To do this:


Count occurrences.

match pattern

Show only text that matches the specified pattern.


Paginate output.

no-match pattern

Show only text that does not match the specified pattern.


Do not paginate output.