Configuration Fundamentals | 33
Command History
FTOS maintains a history of previously-entered commands for each mode. For example:
• When you are in EXEC mode, the UP and DOWN arrow keys display the previously-entered EXEC 
mode commands.
• When you are in CONFIGURATION mode, the UP or DOWN arrows keys recall the 
previously-entered CONFIGURATION mode commands.
Filtering show Command Outputs
Filter the output of a show command to display specific information by adding | [except | find | grep | no-more 
| save]
 specified_text after the command. The variable specified_text is the text for which you are filtering and 
it IS case sensitive unless you use the 
ignore-case sub-option.
The 
grep command accepts an ignore-case sub-option that forces the search to be case-insensitive. For 
example, the commands:
• show run | grep Ethernet returns a search result with instances containing a capitalized “Ethernet,” such 
as interface TenGigabitEthernet 0/0.
•
show run | grep ethernet would not return that search result because it only searches for instances 
containing a non-capitalized “ethernet.”
Executing the 
show run | grep Ethernet ignore-case command would return instances containing both 
“Ethernet” and “ethernet.”
•
grep displays only the lines containing specified text. Figure 2-9 shows this command used in 
combination with the 
do show stack-unit all stack-ports pfc details | grep 0 command.
Figure 2-9.  Filtering Command Outputs with the grep Command
Note: FTOS accepts a space or no space before and after the pipe. To filter on a phrase with spaces, 
underscores, or ranges, enclose the phrase with double quotation marks.
FTOS(conf)#do show stack-unit all stack-ports all pfc details | grep 0
 stack unit 0 stack-port all
     0 Pause Tx pkts, 0 Pause Rx pkts
     0 Pause Tx pkts, 0 Pause Rx pkts
     0 Pause Tx pkts, 0 Pause Rx pkts
     0 Pause Tx pkts, 0 Pause Rx pkts
     0 Pause Tx pkts, 0 Pause Rx pkts
     0 Pause Tx pkts, 0 Pause Rx pkts