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Linux Training Tutorials – History Of Linux

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History Of UNIX

Bell Lab’s Ken Thompson developed UNIX in the year of 1969 with the help of C language founder Dennis Ritchie.Using C language Ken written the UNIX so that it will use for different computers.In 1974 UNIX was issued to Universities for educational purpose.Later days various UNIX flavors out with the based on BSD(Berkeley System Distribution) or AT&T’s System V or combination of both.

Here is the some of the flavors:

– SUN Microsystems SUN OS and Solaris
– IBM’s AIX
– HP-UX
– Apple Computers A/UX

UNIX is very difficult to learn new users because of commandline interface.MIT developed x windows Graphical user interface for UNIX computers.

Linus Torvalds want to create a operating system that most secure and free for all users.Linus picked the source code of UNIX and create the new flavor called Linux.

GNU Project is started in 1984 and purpose to create Free Unix clone for all the users and build non-profit organization.After this GPL(General Public License) implemented for using all the user for free of cost.

Facts Of Linux:

– Linux is fresh implementation of UNIX API
– It is also open source development model.
– It can be use in all variety of hardware.
– Configurations is very flexiable.
– Linux support Multi-User and Multi- Tasking

Architecture Of UNIX:

UNIX architecture is divided into 3 major functionalists:-

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1.KERNEL

Kernel is the most lower level of UNIX which is schedule the tasks and resource management and control the security system.
ex:device interface,file system,multitasking

2.SHELL

Shell acts as user interface.Shell will interpret user commands and start the applications.
ex:ksh,csh,sh

3.UTILITIES OR USER LEVEL

Highest level functionality is Utilities also called as User Level.User will operate all functionalities in multiple stages.
ex:who,awk,vi,cat,sort,cc

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