linux | LinuxCloudVPS Blog

10 Useful firewall-cmd Commands in Linux

August 29, 2023July 30, 2022

In this blog post, we are going to explain 10 useful firewall-cmd commands in Linux with real examples.

The firewall-cmd is the command-line client used to manage the runtime configurations. It is a firewall solution as an alternative to the iptables service. We know that a properly configured firewall is the only weapon that can defend the server from attacks caused by internal influences. The firewall-cmd is part of the firewalld application that can be used for managing the firewall.

In this blog post, we are going to use Ubuntu 22.04 as Linux OS. You can use any Linux distribution. Let’s get started!

How to Manage Processes Efficiently in Linux

March 15, 2019

While using a GUI to manage our tasks has been the norm over the years, using the command line can give the impression that it would be more complicated. However, the contrary is true. Many feel that some tasks are easier and can be done more efficiently on a command line. You might be used to the ubiquitous Task Manager on Windows, where you just press “Ctrl+Alt+Delete” (or “Ctrl+Shift+Escape”), and you get a list of all processes neatly organized in tabs.

While it might not be as simple as a point-and-click system in Linux, you have an extremely powerful task manager called “htop” instead. Once you get past the small learning curve, you’ll feel much more at home with the command line tool, and it might even be faster compared to its GUI counterpart.

How to Disable SSH Password authentication on Linux

January 31, 2018November 10, 2017

In this tutorial we will take a look at how we can disable SSH password authentication on a Linux VPS and setup SSH key-based authentication as this is considered a good security practice.We tested this tutorial on an Ubuntu 16.04 VPS, although it should work with any distribution of your choice as well.

Grep command examples

August 29, 2023January 2, 2013

Grep is one of the most used commands in Unix (or Linux). The name “grep” means “general regular expression parser” The grep command is used to search for text strings or regular expressions within one or more files. It can be very useful in your daily administration work on your Linux Cloud Hosting account.