Leveraging Industry-Standard Technologies

The Juniper Networks operating system is based on a FreeBSD UNIX kernel, with a special shell called the CLI (command-line interface). With FreeBSD UNIX as the kernel, a variety of UNIX utilities are available on the router. For example, you can:

• Use regular expression matching to locate and replace values and identifiers in a configuration, filter command output, or examine log file entries.
• Use Emacs-based key sequences to scroll through command output or edit the command line,
• Store and archive router files on a UNIX-based file system.
  • You can use standard UNIX conventions to specify filenames and paths.
  • You can exit from the CLI environment and create a UNIX C shell or Bourne shell to navigate the file system, manage router processes, and so on.