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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.
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You appear to just be dumping questions on to our site. They read as if they are homework or such like, and we are not here to do your work for you. You have not written proper posts, you have not said please / thank you for the help you have already received. Please don't continue to post like this, thanks.
I wouldn't, as that doesn't work. ;-) That just greps all lines which have any number of any possible characters in them, including zero. here the "." is used as a regular expression character, not a literal period mark in the file name. And if it DID act as that, it would only match lines containing a period anywhere in them, so file.txt would also be matched.
Last edited by acid_kewpie; 02-16-2012 at 06:56 AM.