A-4
Cisco Secure Router 520 Series Software Configuration Guide
OL-14210-01
Appendix A Cisco IOS Software Basic Skills
Getting Help
Getting Help
You can use the question mark (?) and arrow keys to help you enter commands.
For a list of available commands at that command mode, enter a question mark:
Router> ?
access-enable Create a temporary access-list entry
access-profile Apply user-profile to interface
clear Reset functions
...
To complete a command, enter a few known characters followed by a question mark (with no space):
Router> s?
* s=show set show slip systat
For a list of command variables, enter the command followed by a space and a question mark:
Router> show ?
...
clock Display the system clock
dialer Dialer parameters and statistics
exception exception information
...
To redisplay a command you previously entered, press the Up Arrow key. You can continue to press the
Up Arrow key for more commands.
Enable Secret Passwords and Enable Passwords
By default, the router ships without password protection. Because many privileged EXEC commands are
used to set operating parameters, you should password-protect these commands to prevent unauthorized
use.
Router
configuration
Enter one of the router
commands followed by
the appropriate
keyword, for example
router rip, from
global configuration
mode.
Router
(config-
router)#
• To exit to global
configuration mode,
enter the exit command.
• To exit to privileged
EXEC mode, enter the
end command, or press
Ctrl-Z.
Use this mode to configure an IP
routing protocol.
Line
configuration
Enter the line
command with the
desired line number
and optional line type,
for example, line 0,
from global
configuration mode.
Router
(config-
line)#
• To exit to global
configuration mode,
enter the exit command.
• To exit to privileged
EXEC mode, enter the
end command, or press
Ctrl-Z.
Use this mode to configure
parameters for the terminal line.
Table A-2 Command Modes Summary (continued)
Mode Access Method Prompt Exit and Entrance Method About This Mode