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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 5 Using the Command-Line Interface
Using Command History
Using Command History
The software provides a history or record of commands that you entered. The command history feature
is particularly useful for recalling long or complex commands or entries, including access lists. You can
customize this feature to suit your needs as described in these sections:
• Changing the Command History Buffer Size, page 5-5 (optional)
• Recalling Commands, page 5-6 (optional)
• Disabling the Command History Feature, page 5-6 (optional)
Changing the Command History Buffer Size
By default, the router records ten command lines in its history buffer. You can alter this number for a
current terminal session or for all sessions on a particular line. These procedures are optional.
Beginning in privileged EXEC mode, enter this command to change the number of command lines that
the router records during the current terminal session:
Router# terminal history [size
number-of-lines
]
The range is from 0 to 256.
Beginning in line configuration mode, enter this command to configure the number of command lines
the router records for all sessions on a particular line:
Router(config-line)# history [size
number-of-lines
]
The range is from 0 to 256.
Table 5-3 Common CLI Error Messages
Error Message Meaning How to Get Help
% Ambiguous command:
"show con"
You did not enter enough characters
for your router to recognize the
command.
Re-enter the command followed by a question mark (?)
with a space between the command and the question
mark.
The possible keywords that you can enter with the
command appear.
% Incomplete command.
You did not enter all the keywords or
values required by this command.
Re-enter the command followed by a question mark (?)
with a space between the command and the question
mark.
The possible keywords that you can enter with the
command appear.
% Invalid input detected
at ‘^’ marker.
You entered the command
incorrectly. The caret (^) marks the
point of the error.
Enter a question mark (?) to display all the commands
that are available in this command mode.
The possible keywords that you can enter with the
command appear.