Linux

The Unix and Linux operating systems use a shell as a way to interact with the operating system. The shell is a programming language that can be used directly from the command line or it can be...

Redirecting and appending in Unix are fairly simple concepts. While they may appear confusing to many novices, you will find that it is quite simple once you view the definition and see...

The ls command in Unix lists the contents of a directory. In this article, I will demonstrate the correct syntax as well as different options for this simple command.

Solaris is a Unix-based operating system written by Sun Microsystems in 1992. Its components are a mix of open- and closed-source software, though an all-open-source version, OpenSolaris, also...

The Unix shell is the program that sits between you and the operating system. It functions as a command line interpreter and interface between you and the operating system. Several different...

The UNIX operating system (OS) consists of a kernel layer, a shell layer and a utilities and applications layer. These three layers create a portable, multiuser, multitasking operating system. ...

UNIX is an operating system that has been around for decades and is quite different from user-based operating systems such as Windows and the Mac OS. UNIX has advanced security options and gives...

Creating scripts is a fundamental part of a Unix system administrator's job. Scripts are programs that are stored in plain text files and executed from the Unix command line. Although many...

UNIX is a powerful operating system that puts a great deal of responsibility in the hands of the Unix Administrator. UNIX gives the Administrator, and the client, the ability to tweak the...

A password is an important security feature of Unix user accounts. It should be periodically changed (ideally every other month) to achieve a necessary level of security. Unix has a system tool...

Linux is the most popular Unix-based operating system in the world. It is used in everything from supercomputers to home network wireless routers. The eventual widespread use of Linux results from...

The Unix operating system is one of the most diverse and powerful operating systems ever devised. Created in the late 1960s, Unix provides a stable platform for many business operations globally...

In 1969, engineers in Bell Labs came up with the idea of Unix, a multi-user scalable operating system. Unix evolved significantly over the past few decades to become one of the most portable...

Perhaps the only operating systems you are aware of are Windows and MAC OS's. But there is a powerful operating system that has been around for decades that has staying power for years to come. ...

Linux is an open source, Unix-like operating system. Open source refers to the fact that the entire operating system source code is freely available to anyone to view or make changes as they see...

Although there are graphical user interfaces available for Unix systems, it is still common to type commands at the terminal window. If you are coming from a Windows background, this may be a...

Unix is a multi-user, multi-tasking operating system (OS) created in 1969 at the Bell Laboratories. The term multi-user means that one instance of the operating system can be accessed by many...

Although necessary for an operating system to work, a kernel is simply a piece of software that manages the system's resources. In Unix-based operating systems, it is possible to have more than...

The Unix/Linux kernel is the part of the operating system that ensures that all system processes and hardware work together efficiently. The kernel is a software application in the same way that...

In Unix, all directories, devices and files are treated the same. This includes all of the Unix commands. As such, the commands are able to be manipulated in the same way as any other file. You...

Cron is a scheduling program used in all Linux and Unix operating systems. Linux and Unix users tell cron to run a job periodically such as every minute, every hour, or even just once a year....

A tar (tape archive) file is a common Linux/Unix archive format. As an archive, it simply creates one file that contains many other files. There is no compression involved. Tarfiles (or...

Traditionally, software applications for Unix is packaged as .tar files of source code. This code must be converted into a binary format specific to the Unix OS on which it will run. This source...

The Unix find command will locate files and directories with a file system. It can be used in conjunction with other Unix commands to perform system tasks such as cleaning up old files and...

Cron is a UNIX utility that execute programs at regular intervals. Each user and root can specify his own set of commands by creating his own crontab file.

Creating a file is very easy to do in Unix. Many Unix users make programs that create zero length files on the fly from the command line. In other cases, Unix users need to create files that have...

Vi is a powerful command line text editor native to Unix. Although it is not possible to remove duplicate lines of text with native vi commands, it is possible to do so using native Unix commands...

With a few simple commands typed into a terminal window, you can remove any Unix file permanently.

Most Unix systems have historically used GNUzip and compress instead of zip to create compressed file archives. Meanwhile, zip is the most popular compressed file archive format in the Windows...

Unix is one of the original computer operating systems, developed in the late 1960s at Bell Labs. There are a number of variants of UNIX available for free or commercially in the marketplace...

A tar file, which stands for tape archive file, is an archive file that contains many files and directories, much like a zip file on a Windows PC. Tar files are almost always exclusively used in...

A TGZ file is a file archive in TAR (tape archive) file format that has been compressed by the gzip (GNU Zip) program. The TGZ file format is very common in Linux and Unix environments, but it is...

Linux is an operating system that is similar to the Uniplexed Information and Computing System (UNIX). Since Linux is distributed under the GNU General Public License, anyone may obtain its source...

UNIX is one of many operating systems available for use on personal computers, servers and networks. Some deem it to be more efficient and reliable than other systems on the market. The UNIX...

Linus Torvald didn't set out to change the face of computing, nor did he think that his little emulator program would become the kernel upon which hundreds of operating systems are built and on...

Linux is an independent operating system that has become very popular throughout recent years, specifically variations such as Red Hat. Here is some more information for you to make a decision on...

One of the reasons you might hack into a UNIX computer is if you are a systems administrator or if your job is to investigate fraud or security violations and you need to figure out the password...

You may need to switch from Linux/UNIX to Windows because of work requirements or because you wish to use a particular software program. Or you may simply be curious. While it's relatively simple...

Awk is a unique computer processing language that can be used to find and replace text. It is typically used with Unix-based systems and reformats output.

The cURL system program can be used to get files or documents, as long as they are supported by certain protocols. The cURL command is designed to function even without user interaction. To use...

Most commands in Linux work the same as their counterparts in other UNIX applications. However, there are some commands unique to Linux that extend its functionality. In this example we are using...