You may have seen in the previous lessons that whenever we want to check if the configuration is done correctly then we use the “show” command.
In this lesson, I will explain how you can filter the output of the “show” command.
I am still connected via a console cable to the Juniper router. Let me show you how you can filter the “show” command:
root# show | ?
Possible completions:
append Append output text to file
compare Compare configuration changes with prior version
count Count occurrences
display Show additional kinds of information
except Show only text that does not match a pattern
find Search for first occurrence of pattern
hold Hold text without exiting the –More– prompt
last Display end of output only
match Show only text that matches a pattern
no-more Don’t paginate output
request Make system-level requests
save Save output text to file
tee Write to standard output and file
trim Trim specified number of columns from start of line
When I write “show” with a pipe and a question mark, it shows for me the output filters that I can use.
The 1st output filter that I want to speak about is the “count”. When you write just “show”, it will show you the configuration on the router via lines as the following:
root# show
## Last changed: 2024-02-03 17:39:40 UTC
version 14.1R4.8;
system {
root-authentication {
encrypted-password “$1$3hHX87WB$VlIPrcgAMz9TInBYol9.U/”; ## SECRET-DATA
}
syslog {
user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file interactive-commands {
interactive-commands any;
}
}
}
[edit]
root#
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