Service Manual

Filtering show Commands
To find specific information, display certain information only or begin the command output at the first instance of a regular
expression or phrase, you can filter the display output of a show command.
When you execute a show command, and then enter a pipe ( | ), one of the following parameters, and a regular expression, the
resulting output either excludes or includes those parameters.
NOTE: Dell Networking OS accepts a space before or after the pipe, no space before or after the pipe, or any combination.
For example: Dell#command | grep gigabit |except regular-expression | find regular-
expression
except
displays only the text that does not match the pattern (or regular expression)
find
searches for the first occurrence of a pattern
grep
displays text that matches a pattern.
The grep command option has an ignore-case suboption that makes the search case-insensitive. For
example, the commands:
show run |
grep Ethernet
returns a search result with instances containing a capitalized “Ethernet,” such as
interface TenGigabitEthernet 1/1
show run |
grep ethernet
does not return the previous search result because it only searches for instances
containing a noncapitalized “ethernet”
show run |
grep Ethernet
ignore-case
returns instances containing both “Ethernet” and “ethernet”
no-more
does not paginate the display output
save
copies the output to a file for future use
Displaying All Output
To display the output all at once (not one screen at a time), use the no-more option after the pipe. This operation is similar to
the terminal length screen-length command except that the no-more option affects the output of just the specified
command. For example: Dell#show running-config|no-more.
Filtering the Command Output Multiple Times
You can filter a single command output multiple times. To filter a command output multiple times, place the save option as the
last filter. For example: Dell# command | grep regular-expression | except regular-expression | grep
other-regular-expression | find regular-expression | no-more | save.
Enabling Software Features on Devices Using a
Command Option
This capability to activate software applications or components on a device using a command is supported on this platform.
Starting with Release 9.4(0.0), you can enable or disable specific software features or applications that need to run on a device
by using a command attribute in the CLI interface. This capability enables effective, streamlined management and administration
of applications and utilities that run on a device. You can employ this capability to perform an on-demand activation or turn-off
of a software component or protocol. A feature configuration file that is generated for each image contains feature names
denotes whether this enabling or disabling method is available for such features. In 9.4(0.0), you can enable or disable the VRF
application globally across the system by using this capability.
You can activate VRF application on a device by using the feature vrf command in CONFIGURATION mode.
CLI Basics
45