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Unix Introduction BCA

Unix Introduction BCA
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  UNIX Introduction  What is Unix?  JustlikeWindows,itisanoperatingsystem.  LinuxisoneofthepopularversionsoftheUNIXoperatingsystem,whichisdesignedtooffera freeorlowcost operatingsystemforpersonalcomputer users.  AndroidispoweredbytheLinuxoperatingsystem.  Anoperatingsystemissoftwarethatmanagesallofthehardwareresourcesassociatedwithyourdesktoporlaptop.  Toputitsimply,theoperatingsystemmanagesthecommunicationbetweenyoursoftwareandyourhardware.Withouttheoperatingsystem(OS),thesoftwarewouldn'tfunction.  Why use?  Does that operating system you are currently usingreally work ? Or, do you find yourself battling obstacles like viruses, malware, slow downs, crashes, costly repairs, and licensing fees?If you struggle with the above, Unix or its flavour might be the perfect platform for you. Combine that reliability with zero cost (Free)of entry and you have the perfect solution for a desktop platform.  Open source  Open source follows these key tenants:  The freedom to run the program, for any purpose.  The freedom to study how the program works, and change it to make it do what you wish.  The freedom to redistribute copies so you can help your neighbour.  The freedom to distribute copies of your modified versions to others.  The Linux operating system comprises several different pieces:  Bootloader  –  Thesoftwarethatmanagesthebootprocessofyour computer.Formostusers,thiswillsimplybeasplashscreenthatpopsupandeventuallygoesawaytobootintotheoperatingsystem.  Kernel  –  ThisistheonepieceofthewholethatisactuallycalledUnix.ThekernelisthecoreofthesystemandmanagestheCPU,memory,andperipheraldevices.ThekernelisthelowestleveloftheOS.  Daemons  –  Thesearebackgroundservices(printing,sound,scheduling,etc.)thateitherstartupduringbootorafteryoulogintothedesktop.  etc.  Unix System Architecture The kernel is the core part of the operating system, which isresponsible for all the major activities of the operating system
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