Linux Compared to Unix

Linux was developed keeping unix as preference model. Hence, the basics architechture and most of the features of Linux and Unix are the same. In fact, Linux is also considered another version of Unix. The main difference between Linux and Unix is that Linux is Free. Various distributors pf Linux do not charge a price.

but the price is quite low compared to other operating systems. What you get is a full-blown server operating system-- with NO licensing issues. Linux comes with all the development tools you could possibly require-- C, C++, FORTRAN, Pascal, and lot of scripting languages like awk, Perl, and Python, most of which are free . Also, Web servers like Apache, amd browsers such as Netscape provide their versions for Linux, again free.

The Unix operating system requires atleast 500 mb of hard disk space., whereas Linux can be installed on a computer with a little as 150 mb of hard disk space and can run on 8 MB of RAM.

Features	Linux	Unix
Shells available	bash, pdksh, tcsh, zsh, ash	Bourne, Kom, C
Variants	Red hat, Calders, Debian, LinuxPPC, SUSE	AT & T, MULTICS, TICS, BSD, SCO, HP-Ux, IRIX, Ultrix, XENIX Sun Solaris
Licensing	Freely distributed	Expensive licensing

The Advantages of Linux

The Advantages of Linux


Reliability

Linux is a stable operating system. Linux servers are nto shut down for years together . This means tht users on the Linux operating system work consistensly with the Linux server, without reporting any operating system failures.

Backwadrd Compatibility

Linux is siad toe be backward compatible. This implies that Linux has excellent support for older hardware. It can run on different types of processors, not just Intel. It can run on 386 and 486 Intel processors. It also runs well on DEC' s Alpha processor, Sun' s SPARC machine, PowerPc and SGI MIPS.

Simple Upgrade and Installation Process

The installation procedure of most Linux versions is menu-driven and easy. It includes the ability to upgrade from prior versions. The upgrade process preserves the exisitign configuration files and maintains a list of its actions during installations.

Low Total Cost of Owership (TCO)

Linux and most of the packages that come with it are free therefore the total cost of ownership in procuring a Linux server software is low. Also, there are a lot of people and organizations providing free support for Linux, so the cost of support can also reduce. The system configurations reuirements for installing a Linux machines is less, hence the hardware cost goes down.

Support for Legacy Devcies

Linux can run on a machine with low configuration , such as 386 DX/ Users who have low and configuration machines prefer to use Linux compared to other PSs that require configuration.

GUI InterFace

The graphical interface for Linux is the X Window system. It is didvided into two web systems consisting if a server and client. Linux has a number of graphical user interfaces called desktop Environments , such as k desktop Enironment (GNOME), both of which are versions of the X Window system. They run in the x sever.

when u start in KDEM the desktop is organised into folders such as an autoshart, trashcnn
CD-ROM , Printer, and floopy drive. all these folders are simbolized pictorially by icons. When u click on an icon the k manager pops up a browser windw.

Functions of an Operating systems

Command Interpretation

The Central Processing Unit (CPU) needs to understand a command keyed in a user. It can interpret only binary code, that is, code containing O's and 1's . A command keyed in by a user has to be translated to binary code for the CPU to understand it. An OS performs this task.

Memory Management

Memory management is the mechanism by which an OS handles requests for memory. With the development of highly sophisticated software, memory requirements have increased drastically. An OS has to take care of allocating memory to the various applications running on the system . It has to allocate optimum memory to the applications and clean up necessary data from the memory.

Peripheral Management

An OS has to take care of the devices (peripherals) attached to the computer. It handles the communication between the CPU and the printer or the modem

Process Management

To enable several programs to run concurrently, an OS has to ration out the CPU time. It needs to ensure that all the programs get a fair share of the CPU time and no program monopolizes the CPU time.

The functioning of an operating system depends to a great extent on the computer system on which it is located. Since there are two basic types of computer systems - single user and multi - user - there are two types of operating systems. Before you learn about the details of operating systems, let 's first have a brief look at the two types of computer systems available.

Operating Systems

An operating system (OS) is a software program that acts as an interface between a user and a computer. The OS manages the computer hardware, the system resources, the memory, and the interaction between the system and its users. The OS also forms the base on which application software is developed.

Some popular operating systems are:

• Linux
• Unix
• Microsoft DOS
• Microsoft Windows 95
• Microsoft Windows 98
• Microsoft Windows NT Server 4.0

schedule a new post on blog

schedule a new post means if you want to post a new post on your blog on the following date,but on that date you need to go out on some holiday and if u cannot post on that day.schedule post on blogger will help you for this.it will post the same post on the same day and same time which u want.

Read below info how.

1) login to your blogger account and go to create new post section.

2)create a new post and write your post there.

3)after that click on post options,

4)then u will find post date and time,now u enter the date and time when u want the following post to be published on your blog.click on publish.

5) now u can see your post is labeled and u can see scheduled written over there,now u post will be visible on the following given date and time

add programs in Quick Launch section of Taskbar in Vista

• Open Programs menu through the Start Button (located in the lower-left hand side of the desktop.)
• Right-click on the program or application you wish to add to Quick Launch. In the resulting pop-up menu, select "Add to Quick Launch".

Last program now comes in the Quick Launch section, located to the right of your Start Button.

simple way to add blogger footer in blog

want to add any text to ur blogger footer.well this are the 4 simple ways of adding footer in your blog.this works.

• Go to your blog dashboard.
• Go to "Layout" and add a new gadget at the bottom.
• Add a link code to your home, add an email link and add a link to your feed.
• your template and see the new footer in your blog