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Key Features of the SRC CLI
The hierarchical organization results in
commands that have a regular syntax and provides several features
that simplify SRC CLI use:
- Consistent command names—Commands that provide the
same type of function have the same name, regardless of the portion
of the software on which they are operating. As examples, all show commands display software information and statistics, and
all clear commands erase various types of system information.
- Lists and short descriptions of available commands—Information
about available commands is provided at each level of the CLI command
hierarchy. If you type a question mark (?) at any level,
you see a list of the available commands along with a short description
of each command. This means that if you already are familiar with
the SRC software, JUNOS software, or routing software, you can use
many of the CLI commands without referring to the documentation.
- Detailed descriptions of command and configuration statements—Complete
information about commands and statements from the help command.
You can access the reference documentation for each command and statement
by typing the help command followed by the command or help configuration followed by the configuration statement.
- Command completion—Command completion for command
names (keywords) and for command options is also available at each
level of the hierarchy. To complete a command or option that you have
partially typed, press the Spacebar or the tab key. If the partially
typed letters begin a string that uniquely identifies a command, the
complete command name appears. Otherwise, a caret (^) indicates that you
have entered an ambiguous command, and the possible completions are displayed.
Completion also applies to other strings, such as filenames, interface
names, usernames, and configuration statements.
Leveraging Industry-Standard Technologies
The operating system
on a C-series Controller is based on a Linux kernel, with a special
shell called the CLI (command-line interface). A variety of standard
utilities are available. For example, you can:
- Use regular expression matching to locate and replace
values and identifiers in a configuration, or to filter command output.
- Use Emacs-based key sequences to scroll through command
output or edit the command line.
- On a C-series Controller, store and archive system files
on a Linux-based file system.
- You can use standard Linux conventions to specify filenames
and paths.
- You can exit from the CLI environment and create a Linux
shell to navigate the file system, manage system processes, and so
on.
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