What is Unix Linux Unix is an Operating

What is Unix & Linux -Unix is an Operating System with properties of: Multi-tasking (Background, foreground) Multi-user Time-sharing Portable Microkernels -Linux is the most popular version of Unix that is good for PC(Personal Computer). 朝陽科大資管系 范揚文修改自劉熒潔與李麗華

Version of Unix Name Supplier Based on AIX International Bussiness Machines AT&T System V Dynix Sequent BSD HP-UX Hewlett-Packard BSD Irix Silicon Graphics AT&T System V Linux Free Software Foundation Linus’s Kernel Solaris Sun Microsystems AT&T System V Sun. OS Sun Microsystems BSD Unix Ultrix Digital Equipment Corporation BSD Unix Unicos Cray AT&T System V Unix. Ware Novell AT&T System V XENIX AT&T System III Microsoft 朝陽科大資管系 范揚文修改自劉熒潔與李麗華

Major Component of Unix/Linux 1. Kernel: the master control program, resides in the computer’s main memory, and it manages the computer resources. 2. Shell: interprets user commands and passes them on to the kernel. 3. File System: Unix organizes information into collections called files. Files may be grouped into collection called directory. 4. Utilities: the useful software tools. It is often called commands. Ex: text editing, programming, communication, DB management, etc. 朝陽科大資管系 范揚文修改自劉熒潔與李麗華