Linux Howto’s for System Administrations
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Applying updates regularly should be the top priority in the day-to-day tasks of a System administrator. Running unpatched systems for a long time is quite risky. There are many ways …
Today, we are going to see how to encrypt and decrypt files from command line in Linux using a free utility named GNU Privacy Guard (shortly GPG or GnuPG). There are, of …
File transfer over a network can be done in various ways and using different protocols. The most commonly used protocols for copying files remotely are Rsync, SCP and SFTP. In …
In this guide, we are going to learn what is TCP Wrappers, what is it used for, how to install TCP Wrappers in Linux, and how to restrict access to …
In this guide, we will learn what is sshpass utility, how to install sshpass in Linux and FreeBSD systems, and how to use sshpass for non-interactive SSH login in shell …
In this article, we are going to learn what is Ansible Vault and how to use Ansible Vault to protect sensitive playbook data by encrypting the data in Linux. What …
In the previous article, we learned how to run commands in a directory as root via sudo. In this guide, we will see how to prevent command arguments with sudo …
This brief guide explains how to allow an user to run all programs in a directory via sudo and deny the user to run programs in other directories in Linux …
This brief tutorial explains how to force users to use strong passwords using Pluggable Authentication Modules (PAM) in Debian, Ubuntu and other DEB-based systems. Introduction A strong password must have …
In this guide, we are going to learn what is Multi-Factor authentication and its importance and finally how to setup Multi-Factor authentication for SSH in Linux using Google Authenticator app. …