Linux is used a great deal in the computer science and engineering communities. This is largely because of the wealth of tools available in these problem domains. Engineers and computer scientists have historically relied on various versions of UNIX, so this has been a natural progression. Here we mention a small subset of the available tools.

Emacs Emacs is a well-known textfile editor originally developed for UNIX. It is a graphical editor, and is extremely extensible and configurable. Emacs is configured and extended using a programming language (called elisp), which basically means that extensions can be arbitrarily powerful. Emacs' features include syntax highlighting, auto-indenting, multiple buffers and windows, support for CVS, and many others.

VI Vi is another popular editor for UNIX. It is much smaller and less extensible than emacs. For the uninitiated, it is cryptic (you have to type a command just to be able to start typing). However, once you learn the relevant commands, it is surprisingly powerful.

Make Make is an automated tool originally written to for recompiling programs based on which files have changed. It has developed into a general-purpose tool for satisfying dependencies. You specify a configuration file which contains an encoding of a dependency graph and associated commands to execute to satisfy a particular dependency. Then depending on which dependencies still need satisfying, make will run the respective commands. This is perhaps best-illustrated by an example. Consider the following "Makefile":


prog: prog.o
	gcc prog.o -o prog

prog.o: prog.c
	gcc -c prog.c -o prog.o

This is an example showing how to build the program prog from the source file prog.c. It shows the file prog depending on the intermediate file prog.o, and prog.o depends on prog.c. If prog.o is out of date relative to its dependencies (that is, prog.c), then it is regenerated using the associated command (that is, gcc -c prog.c -o prog.o).

CVS CVS is a version management system. It is used as backup storage for the current version of a file and as a repository for old versions of the file. It is most commonly used to track versions of source code, but can also be used for tracking LaTeX documents, web pages, and has been used for configuration files as well.

LaTeX LaTeX is a document-generation system. It uses plaintext source files with mark-up tags to indicate how the text should be formatted (a lot like HTML). It supports document sectioning, tables, embedded figures, and (perhaps most relevant to computer scientists and engineers) incredible support for mathematical equations, formulas, and theorems.