Secure Programming for Linux and Unix HOWTO
by David A. Wheeler
This book provides a set of design and implementation guidelines for writing secure programs for Linux and Unix systems. Such programs include application programs used as viewers of remote data, web applications (including CGI scripts), network servers, and setuid/setgid programs. This document includes specific guidance for a number of languages, including C, C++, Java, Perl, Python, and Ada95.
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This book covers the practical aspects of using and interacting with the Bourne Shell, the root of all shells in Unix world. That includes interacting with the shell on a day-to-day basis for the purposes of operating the computer in normal tasks.
by Dale Dougherty, Tim O'Reilly - Hayden Books
The book shows how to use UNIX to prepare written documents. An introduction to the ex, vi, and sed editors and troff and nroff text processing tools. At the end, these tools are brought together by the make utility to do any text processing job.
by Brian "Beej Jorgensen" Hall
This document discusses several methods of Interprocess Communication, some of which are better suited to certain tasks than others. If you know C or C++ and are pretty good using a Unix environment, these documents are for you.
by Steve Ambler, et al. - Wikibooks
This book is about the X Window System. Some users describe it as the Unix and Linux graphics drivers. X11 is the graphical environment for Unix or Unix-like systems, including *BSD and GNU/Linux; it provides access to screen, keyboard, and mouse.