In Amazon AWS, all the activities that you perform to manipulate your EC2 instances from AWS Console web interface can also be performed from command line using aws cli utilities. The command is aws. You can use the ec2 option in the aws command to manipulate your ec2 instances. This tutorial specifically covers about UserData [...]
Ramesh Natarajan
In SELinux, one of the frequent task that you may do is to change the security context of an object. For this, you’ll use chcon command. chcon stands for Change Context. This command is used to change the SELinux security context of a file. This tutorial explains the following chcon command examples: Change the Full [...]
For loop is an essential aspect of any programming language. In python, for loop is very flexible and powerful. In this tutorial, we’ve explained the following Python for loop examples. Python For Loop for Numbers Python For Loop for Strings Python For Loop Using Default Range Function Python For Loop With Custom Start and End [...]
If you are running VMWare ESXi, after you make certain configuration changes that doesn’t have anything to do with ip-address change, you might get the following error message during the system startup. “Bringing up interface eth0: Error, Some other host already uses address 192.168.101.10 [FAILED]” As you can imagine, this will not start the network, [...]
Once you’ve installed and configured MySQL or MariaDB, the first step is to create a database. Only after creating a database, you can create tables and insert records. This tutorial explains the following examples that are used to create and manipulate a MySQL database: Create New MySQL Database Create MySQL DB with Specific Character Set [...]
Apache Tomcat is an open source Java server. You need Tomcat when you want to deploy and execute a Java application that is written in any of the Java technologies including Java Servlet, JSP, etc. This tutorial explains how to install the latest Apache Tomcat version 9.x on Linux platform Pre-req: Install Java 8 For [...]
Starting from CentOS 7, you will not see a package called mysql-server in the yum repository. Now the package is called as mariadb-server. The original MySQL is now owned by Oracle corporation. But MariaDB is a fork of the original MySQL database. Just like the original MySQL, MariaDB is also open source, developed by open [...]
JRE stands for Java Runtime Environment. JDK stands for Java Development Kit. In most situations, if you want to run a Java application, you just need to install Only JRE. But, if you are doing some development work, or compiling an application that requires Java SDK, then you have to install JDK. This tutorial explains [...]