Cyberithub

Primitive Data Types in Java – int, char, byte, short, long, float, double and boolean

In this tutorial, I will take you through Primitive Data Types in Java. A programming language provides some predefined data types, which are known as built-in data types. There are basically eight built-in primitive data types in Java – int, char, byte, short, long, float, double and boolean. We will understand all the primitive data … Read more

Introduction to Java Programming Language – Java Development Kit(JDK) and Java Runtime Environment(JRE)

In this tutorial, we will go through the introduction of Java Programming Language, Java Development Kit(JDK) and Java Runtime Environment. Java is the most popular Language among Programmers and Developers due to its huge potential and applicability in Designing Real Time Applications. It was originally designed by Sun Microsystems which has now been developed and … Read more

How to Install MariaDB 5.5 Server on RHEL 7/CentOS 7 Linux with Easy Steps

In this article, I will take you through 6 Simple and Easy Steps to Install MariaDB Server on Linux(RHEL/CentOS 7/8). MariaDB is an open source MySQL based relational database management system. It is probably the most popular database currently in use on Linux Based Platforms due to its various features over other databases. It offers … Read more

Solved: “netstat command not found” error on Linux(RHEL 7/8 / CentOS 7/8 / Ubuntu 18.04/20.04)

In this article, I will explain about the “netstat command not found” error and the steps required to solve this error. netstat is a very popular open source command to check network connections on Linux based Systems. Almost all Linux Professionals are usually aware of this tool. Hence it is very much important to understand … Read more

5 Useful Examples to Turn Off SELinux Temporarily or Permanently on RHEL 8/CentOS 8

In this article, I will take you through 5 Useful Examples to turn off SELinux Temporarily or Permanently on RHEL 8/CentOS 8. SELinux is known as Security Enhanced Linux which is integrated with Linux Kernel for implementation for Access Control Mechanism. There are times when you think you need to disable SELinux to accomplish your … Read more

Solved: AH00558: httpd: Could not reliably determine the server’s fully qualified domain name

In this article, we will look into the steps required to solve  “AH00558: httpd: Could not reliably determine the server’s fully qualified domain name,” error. the Recently I was working to bring up my Apache web server to host my PHP Applications on Port 443 but while bringing up the service I noticed “AH00558: httpd: … Read more

Dynamic Memory Allocation with malloc(), calloc(), free() and realloc() functions in C

In this tutorial, I will explain the concepts of Dynamic Memory Allocation with malloc(), calloc(), free and realloc() functions in C. Dynamic Memory allocation is a feature introduced in C to allocate memory blocks as per the changing requirement. This is introduced to overcome the limitation of static memory allocation where once the size is … Read more