1. Introduction to Unix Part 1 Research Computing Workshops Office of Information Technology & Mississippi Center for Supercomputing Research Jason Hale & Susan Lukose

2. Unix is an Operating System An O/S manages access to the resources of a computer. O/S host applications, shielding them from the hardware. Other popular operating systems: Windows XP, Windows Vista, MAC OS X Unix looks more like DOS than Windows

3. Common Flavors of Unix IBM’s AIX Hewlett Packard’s HP-UX. Sun’s Solaris SGI’s IRIX Apple’s MAC OS X Unix Variants: Linux, BSD, …

4. Why Learn Unix/Linux? Unix/Linux commonly used on computer “servers”: Web servers Database servers Supercomputers/Clusters Over 50% of servers in corporations run Unix or Linux A little Unix experience goes a long way, on the job, and looking for a job

5. Why Learn Unix/Linux? At UM/MCSR: - to run Computational CHEM and STAT apps - more disk space than on your PC’s - run one calculation for several days - for calculations too big for your PC or MAC Student programming assignments may be completed on MCSR/UM systems

6. Distributions of Linux Red Hat Enterprise Linux Fedora SUSE Linux Enterprise openSUSE Debian GNU/Linux Ubuntu Mandriva Linux Slackware Linux Gentoo

7. Components of Unix Shells Kernel Shells System Utilities End-User Utilities Development tools Docs Commands

9. MCSR Unix Workshops Will Cover: Shells Kernel Shells System Utilities End-User Utilities Development tools Docs Commands

11. jsu tracct1 tracct2 r1311

12. Unix/Linux File System Similar to MS/DOS Files (Windows Command Prompt): Differences WindowsLinux Case doesn’t matterCase sensitive Spaces ok in filenamesSpaces not OK in names Backslash used in pathnamesForward slash in paths User “Administrator”User “root”

13. Unix/Linux File Permissions