About Unix

• Unix is an operating system, just like Windows, Mac OS.
• Can be used by multiple users, thus Unix is a multiuser platform.
• A patchwork of development.
• The dominant web platform.
• Important: Why learn Unix?
• In this class, we will only summarize Unix, but it should be enough to help you get by.
• Sold by different vendors, with different versions:
• Sun Solaris
• HP-UX
• Linux
• Oddballs: XENIX, QNIX, and many more.
• Each flavor has minute differences.
• But, popular commands are common.