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The Complete Guide to Bash Programming

Script for Managing the Contacts

Explore how to read and process contact data from a file using Bash loop constructs. Learn to avoid infinite loops and store values in associative arrays for effective contact management in scripts.

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Using read

Let’s consider that contacts.txt contains the following content.

Alice=alice@gmail.com
Bob=(697) 955-5984
Eve=(245) 317-0117
Mallory=mallory@hotmail.com

Here is an example to read the first line of the contacts.txt file. The following command does it:

read -r contact < contacts.txt

This command writes the Alice=alice@gmail.com string to the contact variable.

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