Using the Grep command

• Find all the txt files in the current directory

$ ls -1 | grep *.txt

• Find the text “CustomerID” in an XML file

$ grep CustomerID sample.XML

• Find all the ‘git’ commands in your history

$ history | grep git

• Highlight matched patterns

$ grep --color 'data' filename

• Ignore the case when searching for data

$ grep -i 'Data' filename

• Using Perl style Regular Expressions

$ grep -P "[\d]*" filename

This is a living document as work and personal projects require different ways to use Grep and other Linux commands.