Ready to see what’s new in Ubuntu 22.04? In this article, you will learn about all of the main differences between Ubuntu 22.04 Jammy Jellyfish and its predecessor, Ubuntu 20.04 Focal Fossa. We will also list some of the more subtle changes which may not be as noticeable at first, but serve to modify the new operating system under the hood.
server
Linux basic health check commands
There are a variety of tools that a system administrator can use to check and monitor the health of their Linux system. This would include not only the physical hardware, but also the software and how many resources are being dedicated to running the installed services. In this tutorial, you will learn several commands to check overall health of your Linux system from the command line.
Ubuntu autoinstall example
The ability to automatically install Ubuntu Linux would be useful to system administrators that must deploy the operating system to new physical or virtual machines on a regular basis. Automatic provision of these systems can save hundreds of man hours as well as decrease the likelihood of human error. Automation of installing Ubuntu involves supplying the operating system with the desired hostname, username, and password.
How to find my IP address on Ubuntu 20.04 Focal Fossa Linux
The purpose of this tutorial is to show to use the Ubuntu ip command to see information about the local IP address, default gateway, and DNS servers on Ubuntu 20.04 Focal Fossa Linux. The IP address is used by your Ubuntu machine to talk to other devices on the network, like a router or other PCs. Keep in mind that your internal IP address is different from your system’s external IP.
KDE Desktop installation on RHEL 7 Linux
By default, the Red Hat Enterprise Linux distribution sports the GNOME desktop environment, or no GUI at all. If you would like to change things up and install KDE Plasma instead, the GUI can be downloaded and installed directly from Red Hat’s package repositories.
How to change runlevel on RHEL 7 Linux
The conventional way used to change the runlevel with /etc/inittab has become obsolete with Red Hat Enterprise Linux version 7. As a result, any Linux system using systemd system management daemon now relies on the systemctl command to change runlevel – or, to be more precise, to change the target. Therefore any edits to the /etc/inittab file will not take effect on RHEL 7.
How to change a hostname on Redhat 7 Linux
The hostname of your Red Hat Enterprise Linux system is important because it’s used to identify the device on a network. The hostname is also shown in other prominent places, such as in the terminal prompt. If you have not bothered to change the hostname yet, your system probably bears the default localhost.localdomain name, which is not very helpful.
Sudo: allow command without password
Nearly every Linux distribution these days uses the sudo utility as a way to grant non-privileged users the ability to execute commands as privileged root users. You may have noticed that after entering your sudo password once, you can continue to execute commands without needing to re-enter it for five minutes. We can even extend this convenience by allowing any sudo commands to be executed without a password.
How to install Puppet on Ubuntu
Puppet is a powerful tool to automate server configuration, deploy updates or other configuration, and manage multiple systems at once. Puppet also has its own programming language, which is easy to understand even for inexperienced programmrs. The application is free, open source, and can be installed on Ubuntu Linux.
How to remap keys with xmodmap
Setting your keyboard layout should be one of the first things users do when installing or setting up their Linux system. Every system will come with a slew of preconfigured layouts for various languages or preferences. But what if you want to take it a step further and modify a layout to your liking?
Check Debian Linux version
Being aware of your current Debian version will help you know when it is time to update. It’s important to know the version of your Debian Linux system, as new versions are released about every 2 years. Staying up to date will keep your system secure and ensure that you have the newest software available.
TERM environment variable not set – Solution
The TERM environment variable not set message is a frustrating error that can render your Linux system widely unusable, at least from the command line. In this tutorial, you will see how to resolve the error.