RegEx : Find Email Addresses in a File using Grep
Here is a best regular expression that will help you to perform a validation and to extract all matched email addresses from a file.
This regular expression matches 99% of the email addresses in use nowadays.
In this article you'll find a regular expression itself and an example of how to extract matched email addresses from a file with the grep command.
Regular Expression to Match Email Addresses
Use the following regular expression to find and validate the email addresses :
Get a List of all Email Addresses with Grep
Execute the following command to extract a list of all email addresses from a given file :
|-E, --extended-regexp||Use extended regular expression|
|-o, --only-matching||Print email addresses only|