Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
Apparently Red Hat ships with both Sendmail and Postfix and a utility called alternatives. The alternatives command is used to swap between Sendmail and Postfix, because only one MTA may run at any given time. (Which I doubt--I'm sure someone somewhere has both running on a single machine)
This is what I learned:
General Information About alternatives command:
• Red Hat and Fedora ship with...
No matter how well I think I know sed, it still manages to bite me more often than serve me. Everything I do know about sed, manuals aside, I learned from other programs like ed, vi, and even awk. What I'm getting to is this: my sed-fu is weak, so don't take anything I say about it at face value. Do your own research and learn better for yourself (which you ought to do regardless).