IntroToLinux

What is Unix?

Unix is a family of operating systems that was first developed in 1969. The original version was called Multics. Unix became the foundation for many modern operating systems.

Key Unix Characteristics:

• Multi-user and multi-tasking operating system
• Hierarchical file system
• Simple, powerful command-line interface
• “Everything is a file” philosophy

Known Unix Versions:

• AIX - IBM’s version of Unix
• BSD - Berkeley Software Distribution
• HP-UX - Hewlett-Packard’s Unix
• Solaris - Oracle/Sun’s Unix

Important Facts:

• Linux has been the most widely used Unix-like system since around 2000
• macOS is based on FreeBSD, an open-source Unix variant

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