In this article, we’ll learn to set the JAVA_HOME variable in Linux. JAVA_HOME should be correctly set on your system in order for you to be able to run Java programs successfully. In case there is an error, you will get the following error : To avoid getting this error you will have to set …
The help command is the simplest way to get information regarding a built-in shell command. It helps you fetch information from the shell’s internal documentation. It takes a text string as the command line argument and looks for the provided string in the shell’s documents. This saves you the time spent in going through the …
In this tutorial, we will be learning how to use the RPM Package Manager (RPM command) to install software packages. RPM is a free open-source package manager tool that comes preinstalled in RHEL, Fedora, and CentOS-based distributions. It’s similar to the apt package manager that accompanies Debian and Ubuntu-based distributions. It’s an easy to use …
Creating and editing files is the most basic part of using a Linux based system. There are different ways to edit files in Linux. This tutorial we go over the ways that you can use to edit a file in Linux. You can either use a GUI text editor or you can do it using …
The tree command recursively lists directories and files in Linux. Files are listed in an indented manner under their directories. Tree command is similar to ls command which is famously known for listing files and directories. The only difference is that tree command outputs the files and directories in a tree-like manner. This command is …
In this tutorial, we will learn how we can run C programs in Linux. C language was developed at Bell Laboratories in 1972 by Dennis Ritchie. It is still very popular for system-level programming. C language is the mother language of many other languages. In fact, Unix is one of the first operating system kernels that …
How to Run C Programs in Linux? – 3 Step Quick Guide Read More »
In this tutorial, we will look at Syslog in Linux and how to send logs to a remote machine using it. Syslog is a standard for message logging. It has been the standard logging mechanism on Linux/Unix systems for a very long time. Although most of the distros now ship with journald – a systemd …
What is Syslog in Linux? A Step-by-Step Guide to Set up Remote System Logging Read More »
In this tutorial, we will be installing and configuring the CentOS firewall. We will be using a very powerful and popular Firewall management tool called firewalld. Firewalld is built over iptables (which was previously used to filter network traffic) and comes preinstalled in all newer versions of CentOS, RHEL, and Fedora. Fundamentals of Firewalld Firewalld …
CentOS Firewall Tutorial – How to Install and Setup the CentOS Firewall? Read More »
In this article, we’ll learn to install cmake on Linux. CMake is a cross-platform open-source meta-build system that can build, test, and package software. It can be used to support multiple native build environments including make in Linux/Unix, Apple’s Xcode, and Microsoft Visual Studio. How to Install CMake on Linux? If you are to work with …
The dd command is a utility to copy and convert files from one location to the other. Interestingly, it stands for ‘copy and convert’ but since the name cc was already taken by the C compiler, it was named ‘dd‘. Since dd interacts directly with the sectors of a disk it is a potentially dangerous …
