History of Linux

-

 

History of Linux –

In 1964 Bell Laboratory stats a project in which they want to develop multiuser operating system. Dennis Ritchie and Ken Thompson was part of the project. Then in 1969 Bell Laboratory withdraw the project due to lack of results.

But Dennis Ritchie and Ken Thomson started the project again from the beginning and developed a operating system called UNICS/UNIX (Uniplexed Information and computing services), and the source code of this operating system was freely available.

Then in 1975 UNIX version 6 gain popularity and some companies started taking benefit of it and developed their own flavours of UNIX.

IBM developed AIX, Sun system developed Sun Solaris, Apple developed MAC OS, HP developed UX.

But all these operating system was not freely available, at that time Linus Torvalds was student and he wants to research on UNIX operating system and operating system was not freely available at that time so he started developing his own flavour of UNIX called Linux in 1991.

To develop Linux, Linux Torvalds started to write the code from beginning UNIX as a reference and MINIX operating system developed by Andrew Tanenbaum.

In between 1991 to 1995 there was movement called free software movement or GNU under which free software provided. Basically, Linux is a kernel and by combining GNU we called it as an operating system (operating system is a combination of kernel and software’s).

Linux is open-source code operating system, so different companies like Red Hat, Fedora, Debian, Ubuntu, CentOS developed their own operating system with the help Linux open-source code.

These companies provide free version of their OS but the services are chargeable.

We can access Linux O.S. with the help of Command Line Interface (CLI) and Graphical User Interface (GUI).

Short Notes -

Linux is Kernel not O.S.

Linux is not a UNIX derivative; it was developed from scratch.

A Linux distribution is the Linux Kernel and a collection of software that together, create a O.S.

Linus O.S. – Kernel + GNU

Linux features/Advantages -

Open source (Create/modify their own version of Linux)

Secure (Antivirus not spread like windows from one file to another file)

Simplified updates for all installed software

Light weight (RAM consumption is less, 1GB RAM of Linux is equivalent to 50GB RAM of windows)

Multiuser – multi task

Multiple distribution – Red hat, Debian, fedora.

 

 

 

 

 

 

 

 

 

 

 


Comments

Post a Comment

Popular posts from this blog

Computer Networking

-
  Computer Network – A computer network is a digital communications network which allows nodes to share resources. Types of nodes – Router, Switch, Firewall, Server, Client Clients – A client is a device that accesses a service made available by server. Server – A server is a device that provides functions or services for clients. Switches – 1.       Provides connectivity to hosts within the same LAN (Local Area Network). 2.       Switches do not provide connectivity between different LAN’s/ over the internet. 3.       Switches have many network interfaces/ports for end hosts to connect to (usually 24+). 4.       Catalyst 9200, Catalyst 3650 are some switches we use in network. Routers – 1.       Provides connectivity between LANs. 2.       Hence used to send data over the internet. 3.    ...
Read more

TCP/IP Suite

-
TCP/IP Suite – 1.     Conceptual model and set of communications protocols used in the internet and other networks. 2.     Known as TCP/IP because those are two of the fundamental protocols in the suite. 3.     Developed by the United States Department of Defense through DARPA (Defense Advanced Research Projects Agency). 4.     Similar structure to the OSI model, but with fewer layers. 5.     This is the model in use in modern networks. 6.     Note – The OSI model still influences how network engineers think and talk about networks.   4. Application 3. Transport 2. Network 1. Data link    
Read more