CS138 Study Guide - Unix Shell, Abstract Data Type, Entry Point

• School: University of Waterloo
• Department: Computer Science
• Course: CS138
• Professor: Andrew Morton

Document Summary

Unix and c were developed in the 1970s at bell labs / at&t in new jersey by thompson, Later, c++ was also developed there by stroustroup et al. Nextstep is based on this, mac osx is based on nextstep. Solaris/sunos was developed by sun microsystems in the 1980s and is now owned by oracle. There exist aix, hp-ux, sco, and other commerical unices. Some are re-implementations of unix tools, but gnu"s not. Linux is technically just the kernel, but is mostly useless without a shell, compiler, cl utilities thus a linux distribution contains mostly gnu free software, and should properly be termed gnu/linux. The shell sh is the bourne shell, the rst practical, widely-used shell. Pretty much all oss have a le system, though you can"t see it in ios. Your home directory is where your personal stu is stored. For example, user "god" has a home directory god. Some commands in unix t e s t . c c.