Found 105 Articles for Information Technology

This article will be helpful if we forget the root password on Centos 7.x or RHEL 7.x. In the previous version of RHEL, we can easily break the root password, as by default SE-Linux is enabled. Also note that, RHEL has brought many special new features.Resting the Root PasswordReboot/Restart the system.Press ‘e‘ at the grub boot menu to edit the default boot menu.This screen looks like this for RHEL 7.x –Press us thr down arrow key to find the line which contains similar to the ‘linux16 …… rhgb quit …..” and replace the ‘rhgb quiet’ words with ‘init=/bin/bash’. Once we ... Read More

In this article, we will learn how to configure and install the most popular open source MTA (Mail Transfer Agent) Postfix, which can be used to route email delivery of the Linux Systems. Based on industry usage and estimates, most of the public mail servers are currently running on Postfix.Installing the Software on LinuxSince, Postfix is a default package in the Ubuntu repositories, we can install it easily by using the ‘apt-get’ command. Before we install the packages, we need to update the system. We can do this by using the below command.Here is a sample demo, I used hanuman.com ... Read More

All those who are enthusiastic about photography, having a photography website is beneficial as it is a great way to show not only your work to the world but also your talent and commitment to the art of photography. That’s not all, it also helps you to reach your prospective clients and helps to build a personal brand.Photography website can be built with ease with WYSIWYG tools, WordPress and Squarespace, but there exists little downside with these tools, you need to manually update them either every few weeks or fortnight.WordPressCreating a website using WordPress is not only easy, but also ... Read More

In this article, we will learn how to change the host name on CentOS 7.x / RHEL 7.0, by default after installation on CentOS 7 or RHEL the default hostname will be localhost.localdomain. This hostname will be used for various services, unlike the older versions we will try to change the host name by changing /etc/sysconfig/networks or using the host name command to change the hostname and after multiple reboot of server the hostname remains as localhost.localdomain. The procedure for changing the host name in CentOS 7 or RHEL is totally different from the previous versions. we have 3 tools ... Read More

Secure Shell or SSH is a cryptographic (encrypted) network protocol operating at layer 7 of the OSI Model to allow remote login and other network services to operate securely over an unsecured network.OpenSSH is a premier connectivity tool for remote login with the SSH protocol. It encrypts all traffic to eliminate eavesdropping, connection hijacking, and other attacks. In addition, OpenSSH provides a large suite of secure tunneling capabilities, several authentication methods, and sophisticated configuration options. This article explains about important tasks to secure your SSH server setup.Use a Strong PasswordA password is a string of characters that people can use ... Read More