PARTS OF LINUX OPERATING SYSTEM
Linux operating system following important parts.
*Kernel:
The kernel is the core of the Linux system. the kernel controls the source of COMPUTER, allowing them to different users and tasks.IT is loaded in whenever the system boots, it manages the resources of the system. The function performs by the kernel are:*Managing the machine's memory and allocating it to each process.
* Organization the transfer of data from one part of the computer to another.
*Accepting the instructions from the shell and carrying them out.
*Enforcing the access permissions that are in force on the file system.
SHEll:
Linux has a simple user interface called the shell that has the power to provide services that a user wants. The shell acts as the command interpreter, it takes each command and passes it to the operation on the screen, The function performed by the shell are:*Create an environment that meets the user needs.
*Writes shell scripts.
*Manipulates the command line.
*Edits the command line.
The most popular shells are bash, Parkash, tesh,zsh, ash, etc.
*Linux Filesystem:
A file system is a logical method for organizing and storing large amounts of information in a way which a hierarchy of directories,l. All files in Linux operating system stored on the disk Onder main directory called the root directory.there are three categories of files:*Ordinary files
*Directory files
*Systems files
* X-WINDOW:
Linux is the powerful framework for working with graphical applications and it is referred to as an x-window system.x handles the function of opening x-based graphics user interface(G UI) applications and displaying them on an X -server process. Linux has an X-RAY based desktop environment to provide a desktop metaphor and windows manager to provide the GUI applications like icons, window frame, menus and colours, or a combination of these items called themes.*Types of Linux
Linux is available in different froms. There are so many distributions if Linux available.they are:*Red hat Linux. :(www.redhat.com)
*Dude Linux(www.suse.com)
*Mandrake Linux : (www.mandrakesoft.com)
*Debian GNU/Linux : (www.debian.org)
*Slackware Linux :(www.slackware.com)
Caldera Linux. :(www.caderasystems.com)
Linux pro. :(www.linuxpro.com)
Turbo Linux. :(www.turbolinux.com)
CLI(command line interface) in Linux
SHEll in Linux works as cKI. It displays a prompt on the screen at which we can give the various command to perform various tasks. this prompt is known as shell prompt. the shell interface provide s a way to run programs, work with the file system, compile computer code and manage the command arguments is known as "command line".A command line usually ends with a newline character. The command line completes only after the user has hit the enter key. The '\' symbol placed at the end of a line continues the command to the next line, ignoring the hit of entering key.several commands may be written in a single command line. they must be separated by the semicolon(;).e.g., $who;date.
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