What is Unix? What is Linux?
What is Unix?
- An operating system developed by Ken Thompson and Dennis Ritchie at AT&T Bell Laboratories in the late 1960's.
- In 1978 AT&T's Unix seventh edition was split off into Berkeley Software Distribution (BSD).
- AT&T SVR5 spawned several other commercial versions of Unix including:
- Sun Solaris
- HP-UX (Hewlett-Packard)
- AIX (IBM)
- IRIX (Silicon Graphics)
- Digital Unix / Tru64 Unix (Digital Equipment Corporation)
plus many others.
- A nice history of Unix can be found here from USAIL http://uwsg.iu.edu/usail/concepts/unixhx.html
- Additional notes on learning about and using Unix from USAIL http://uwsg.iu.edu/usail/index.html
What is Linux?
- A freely available version of the UNIX operating system
- Started by Linus Torvalds in 1991
- Programmers from around the world contribute code
- Main portion of Linux: The Linux Kernel
- Can be downloaded from a number of sites (www.linux.org) as well as purchased in packages (called distributions) from companies such as RedHat (www.redhat.com) and Suse (www.suse.com).
- Runs on Intel 486, Pentium (and better) processors as well as Sun Sparc, DEC Alpha and dozens of other processors (e.g., Xbox).
- Ways of installing/using Linux:
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