As a Linux user, you can opt either to allow or restrict network access to some services or IP addresses using the firewalld firewall which is native to CentOS/RHEL 8 and most RHEL based distributions such as Fedora. The firewalld firewall uses the firewall-cmd command-line utility to configure firewall rules. Before we can perform any
When it comes to accessing remote devices such as servers, routers, and switches, SSH protocol comes highly recommended given its ability to encrypt traffic and ward off anyone who might try to eavesdrop on your connections. Be that as it may, the default settings of SSH are not infallible and additional tweaks are needed to
You are aware of “pwd” command, aren’t you? The pwd command (stands for Present Working Directory) is used to print the current working directory. What about “pwdx”? Have you ever used or heard of it? No? No problem! The pwdx command is to used report current working directory of a process. In this guide, we
Introduction When setting up cloud infrastructure, getting your applications up and running will often be your primary concern. However, making your applications function correctly without addressing the security needs of your infrastructure could have devastating consequences down the line, so it is worthwhile to consider this as part of your initial infrastructure setup. In this
Abbreviated as nmcli, the network manager command-line interface is a nifty and easy to use tool that saves you lots of time when you need to configure an IP address. To display all the active network interfaces on your Linux system execute the command. $ nmcli connection show OR $ nmcli con show Note that
This tutorial explains how to add, delete and grant Sudo privileges to users in Linux operating systems. The steps provided below are tested in Ubuntu 20.04 LTS edition. However, the steps are same on other distributions such as Arch Linux, Debian, Fedora, CentOS, RHEL, openSUSE etc. Before getting into the topic, let us see what
Relax-and-Recover (ReaR in short) is a simple yet powerful, easy-to-setup, full-featured and leading open-source bare metal disaster recovery and system migration solution, written in Bash. It is a modular and configurable framework with numerous ready-to-use workflows for common situations. ReaR creates a bootable rescue system and/or system backup in various formats. You can boot your
NFS (Network File Share) is a protocol that allows you to share directories and files with other Linux clients in a network. The directory to be shared is usually created on the NFS server and files added to it. The client systems mount the directory residing on the NFS server, which grants them access to
Are you a Linux newbie? Are you looking for a command-line tool that can help you download files from the Web? If your answer to both these questions is yes, then you’ve come to the right place, as in this tutorial, we will discuss the basic usage of the WGET command-line utility. Please note that all the
In this short quick article, you will learn how to find all clients (using their IP addressees) connected to an Apache or Nginx web server on HTTP or HTTPS ports on a Linux server. In Linux, every service running on the server listening to the socket for a client to make a connection request. Upon
