In this article, I will take you through 15 dmesg command examples that can be used for troubleshooting any Linux Servers issue. dmesg, also sometimes abbreviated as "driver message" or "display message" is an open source utility or command that is used to examine or control kernel ring buffer. dmesg command fetches the logs from ... Read more

In this article, I will take you through the steps to setup a Virtual Linux Host Using rkt and Vagrant. Many times we get a requirement where we need to setup a virtual Linux host quickly to test a deployment or an application. While there are multiple ways to setup a virtual Linux host but ... Read more

Supervisor is a process manager open source tool which monitors and control the lightweight, long running processes. More on Official website. In this tutorial we will create a simple application and see how to manage supervisor configurations for multiple applications. supervisord -> server piece of supervisor is named as supervisord supervisorctl -> client piece of ... Read more

In this article, we will see how to install LVM utilities on Ubuntu 20.04 LTS (Focal Fossa). If you are using some Debian based system like Ubuntu 20.04 LTS Server then there are chances that LVM utilities might not be available in your System. Because of this whenever you try to use these utilities, you ... Read more

In this article, I will take you through the steps to install iptables services on RHEL/CentOS/Rocky Linux based System. iptables is a free and open source command line utility to setup, maintain and inspect the tables of IP packet Filter rules in Linux Kernel. While you can create rule using iptables command but when you ... Read more

In this article, I will take you through the steps to install firewalld on Ubuntu 20.04 LTS. firewalld is just like any other Linux firewall but with some special features. It uses an excellent component called zones to control traffic entering in your Systems. A zone is basically a collection of network cards that is ... Read more

In this article, we will look into two types of user in Linux - System Users and Human Users. As you probably know, every Linux System has an entity called User which performs a range of system management tasks. Each user will have a unique ID called UID(User ID) and GID(Group ID). Similarly, there is ... Read more

In this article, I will take you through the steps to install and configure SSHGuard to Block Brute Force Attacks on Linux Servers. SSHGuard is a free and open source application that works along with firewall to protect hosts from brute-force attacks against SSH and other services. It aggregates system logs and blocks repeat offenders ... Read more

In this article, we will see how to solve "-bash: /etc/iptables/iptables.rules: No such file or directory" error. In many cases, if you don't have the required packages installed then you always end up in error like this. Here also same thing happened with me when I was trying to use iptables command to create a ... Read more

In this tutorial, we will see how to define audit File System Rules in RHEL/CentOS/Rocky Linux. By this time you must have understood that Audit system operates on a set of rules that define what it is to be captured in the log. There are three types of audit rules - Control Rules, File System ... Read more