"The Linux Foundation announced the LFCS (Linux Foundation Certified Sysadmin) certification, a new program that aims at helping individuals all over the world to get certified in basic to intermediate system administration tasks for Linux systems. This includes supporting running systems and services, along with first-hand troubleshooting and analysis, and smart decision-making to escalate issues to engineering teams.

Part 1: How to use GNU ‘sed’ Command to Create, Edit, and Manipulate files in Linux"

-- source: http://www.tecmint.com/sed-command-to-create-edit-and-manipulate-files-in-li...

Parts 2-9 are listed in that article as well.

Cheers, Peter