Unix and Linux

A regular expression is a string that can be used to describe different sequences (arrangement) of characters. Regular Expression is often used by various Unix commands, including

A file system is a logical collection of files on a partition or a disk. A partition is an information store and can be combined into a hard disk if desired.

Unix supports a concept of Group Account, which groups a number of accounts logically. Each account will be part of any group account. The Unix team plays an important role in

The purpose of this tutorial is to introduce performance analysis with the tools available for monitoring and managing performance on Unix systems, and to provide a general

Unix systems have a very powerful and flexible logging system, which gives you the ability to record almost anything you can imagine and then manipulate this log to track the

Signals are software interrupt signals that are sent to a program that indicates a serious event has occurred. These events can be very diverse from user requests to illegal

This chapter lists the commands, including syntax and brief descriptions. For more details about these commands, you use.

Most parts of the tutorial are mostly built on Bourne Shell, but this page lists all the built math functions available in the Korn Shell.

These are the basic knowledge of unix and linux for novices with this type of operating system. Our basic tutorial series will introduce the most basic knowledge of UNIX / Linux

Unix operating system is a collection of programs that act as a link between a computer and a user.

All data in Unix is ​​organized in files. All files are organized in folders. These directories are organized in a tree structure that is called the file system.

A directory is a file whose only task is to store the name and related file information. All files, which can be regular, special or directory files, are kept in folders.

File ownership is an important component of Unix that provides a secure way to store files. Every file in Unix has the following properties to represent access rights to it.

An important Unix concept is the environment, which is defined by environment variables. Some are set up by the system, others are set up by you, by the shell or any program you

By this chapter, you have a few basic insights about Unix systems and some of its basic commands. This chapter will briefly discuss some of the basic but important utilities of

You can connect two commands together so that the output of a program is the input of the next program. Two or more commands connected in this way form a pipe.

When you run a program on a Unix system, the system creates a special environment for that program. This environment contains everything needed for the system to run the program

When you work in a distribution environment then you need to communicate with remote users and you also need access to remote Unix devices.

There are many ways to edit files in Unix and for me, one of the best ways is to use the Editor to edit the micro screen orientation. This editor lets you edit the lines of

Shell is an environment in which we can run commands, programs and Shell scripts. There are different versions of Shell, which differ only from the version of the operating