Filter email addresses with egrep
You can use the following command to filter email addresses from text: egrep -o "\b[a-zA-Z0-9.-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9.-]+\b" For example, to get email addresses of all users with wp-cli: $ wp user list | egrep -o "\b[a-zA-Z0-9.-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9.-]+\b" Cool huh?!