Home arrow Help Docs arrow Introduction to Linux/Unix-I
Main Menu
Home
Help Docs
Newbies
Corporates
Gnu/Linux Distros
Programming
Databases
Links
Search
Regular
News
Interviews
Aaj Ka Tip
Aaj Ka Command
Community
Blogs
Wiki
Forums
Services
Free Software

Introduction to Linux/Unix-I Print E-mail
Introduction to Linux/Unix-I

Here we will see what these basic terms of Linux/Unix mean to us

Multiuser

Multi-user operating systems allow multiple users to utilise the computer and run programs at the same time. All time-sharing systems are multi-user systems, but most batch processing systems for mainframes were too, to avoid leaving the expensive CPU idle while it waited for I/O operations to complete.

The most obvious example is a Unix server where multiple remote users have access (via Telnet) to the Unix shell prompt at the same time.

More..



Multitasking

In computing, multitasking is a method by which multiple tasks, also known as processes, share common processing resources such as a CPU with help of time slices. In the case of a computer with a single CPU, only one task is said to be running at any point in time, meaning that the CPU is actively executing instructions for that task. Multitasking solves the problem by scheduling which task may be the one running at any given time, and when another waiting task gets a turn. The act of reassigning a CPU from one task to another one is called a context switch.

More..

Multiprocessing

Multiprocessing is traditionally known as the use of multiple concurrent processes in a system as opposed to a single process at any one instant. Like multitasking which allows multiple processes to share a single CPU, multiple CPUs may be used to execute multiple threads within a single process.

More..


Shells

A Unix shell, also called "the command line", provides the traditional user interface for the Unix operating system. Users direct the operation of the computer by entering command input as text for a shell to execute

Unix shells

  • Almquist shell (ash)
  • Bourne shell (sh) Written by Steve Bourne, while at Bell Labs. First distributed with Version 7 UNIX, circa 1978.
  • Bourne-Again shell (bash)
  • C shell (csh) Written by Bill Joy, while at the University of California, Berkeley. First distributed with BSD, circa 1979.
  • scsh (Scheme Shell)
  • TENEX C shell (tcsh)
  • Korn shell (ksh) Written by Dave Korn, while at Bell Labs.
  • rc shell (rc) The Plan 9 shell by Tom Duff while at Bell Labs, later backported to Unix and other Operating Systems.
  • Z shell (zsh)
[edit]

More..

References: http://en.wikipedia.org/
< Previous   Next >



gnulinuxclub
Join Us
About Us
Contact Us
Support Us
Acknowlegdement
Login(only for dev.)

Royalty Free Images

O'Reilly User Group discount!




Powered By GIMP GIMP
Contact Webmaster Copyleft 2011 gnulinuxclub.org