UNIX History UNIX began as a research project. UNIX System V developed at Bell Laboratories. BSD (Berkley Software Distribution) UNIX XENIX UNIX Sun Operating System (UNIX) Multics in the 1960s (MIT, AT&T, Bell Labs and GE).

UNIX Benefits Multi-user and Multi-tasking Robust Networking Environment Client/Server Computing Base system for Internet and Internet development. Excellent platform for Web servers. Excellent portability and scalability.

UNIX Platforms Engineering workstations, multi-user micro- computers, mini-computers, mainframes, and supercomputers. UNIX has grown exponentially with some 20 million computers now running some flavor of UNIX, and over 100 million people using these systems. UNIX runs on a RISC processor – large environment – Reduced Instruction Set.

Linux Speak Linux first developed in 1991 by Linus Torvalds. Linux was meant to be a PC version of UNIX. Linux runs on a CISC processor – smaller environment – Complex Instruction Set. Useable free of charge. Copyrighted under General Public License “GNU” = “GNU is NOT UNIX.”

Linux Flavors Linux does not use any proprietary code; as it comes packaged with many executables, making up a fully functional UNIX OS. Flavors include but are not limited to: Red Hat Ubuntu Knoppix (German) Debian Caldera

UNIX and Linux Structures UNIX and Linux Operating Systems are built on a “files and file systems” methodology. The “root” user and file system. Administration of user accounts and passwords. LAN/Dial-In/IP Network or Telnet Devices and file systems.