grep Chaining

Chaining grep

We can even pass the output from a grep command to another grep command to build complex filter chains.

Step One: Get our Dataset

curl -s https://launchcodelearning.org/api/walkthrough/user?data_format=csv

Output:

25000 records is too much.

Step Two: Filter Matches '^John'

Filter data to include only '^John':

curl -s https://launchcodelearning.org/api/walkthrough/user?data_format=csv | grep '^John,'

Output:

Step Three: Filter Matches 'Microsoft$'

Using the output from the previous filter, filter further to include lines that match 'Microsoft$'.

curl -s https://launchcodelearning.org/api/walkthrough/user?data_format=csv | grep '^John,' | grep 'Microsoft$'

Output:

Step Four: Filter Matches @example\.com

Using the output from the previous filter, filter further to include lines that match '@example\.com'.

curl -s https://launchcodelearning.org/api/walkthrough/user?data_format=csv | grep '^John,' | grep 'Microsoft$' | grep '@example\.com'

Output: