Moving some ZFS filesystems to the ‘trash’ and removing all their snapshots – sanoid

I recently discovered that you can delete all snapshot from a ZFS filesystem with a single command. It came to me via fortune: [...]

Configure SSH ProxyCommand for Ansible AWX on Kubernetes

There’s no end to the fun that was made of me today for touching the K-word. Be that as it may, I have to do this if I want to continue giving AWX/Tower trainings, and in order to do that I need AWX to use an SSH jump host to get to nodes. The reasons for that lie hidden in here.

This post is going to be a quick and dirty collection of how I solved the particular issue I requested help on, and the last thing you want to do is to ask me for help on Kubernetes & co. It took me several hours to solve this problem.

What’s the problem? I need to deploy an SSH key and an SSH conf file into the containers (or are those pods?) the AWX task (awx-task) processes are running in.

How to clone an encrypted disk image with Clonezilla

How To Install and Use GNU Emacs on Linux Distributions

The GNU Emacs is one of the best and leading text file editors for software developers and programmers. It is so much more than a text editor that you can use to see scheduled events, browse files, and do other little funny kinds of stuff. If you’re thinking about switching to Emacs on your Linux, or you’ve just switched to it, you will find that Emacs is not that hard to use. The simple and clean user interface of Emacs will attract you.

Now, you might be comfortable with your existing text editor, but there is no harm in trying a new editor. No matter if you’re a power Linux user or a newbie, you would love to use the Emacs editor on your Linux machine. If you have other operating systems, you can install Emacs on them too; it is also available for Windows and Mac.

How To Install NoMachine on CentOS 8 - idroot

In this tutorial, we will show you how to install NoMachine on CentOS 8. For those of you who didn’t know, NoMachine is a cross-platform, fastest, and highest quality remote desktop tool that enables you to access the desktop of any other machine with NoMachine installed.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of the NoMachine remote desktop on a CentOS 8.

How to Change Default Port of Tomcat Server? – Linux Hint

Before we actually move onto the main step of seeing how we can change the default port of our tomcat server, let us first go into a little more depth and see what actually this tomcat server is and what are some applications where it is mostly used.

As mentioned before, the Apache Tomcat server is an open-source web server that acts as a servlet container for the implementation of several large-scale Java enterprise specifications such as Java Servlet, Java Server Pages, Java Expression Language, and Java WebSocket technologies. Servlet containers are part of the webserver and can be described as more or less an application server that provides the programming model everything else that it needs – the opening of sockets, managing some components, handling API calls, and so on. The Apache Tomcat server is one of the most widely used servers out there and has been powering up several large-scale enterprise applications. In addition to this, since it is opensource and falls under the Apache License, it includes a large developer list and several forums where people are always providing their input and offering aid to one another.

Without further ado, let us finally move on to the main topic of our article.

Finger command tutorial – Linux Hint

It is very important to know about the system’s admin. You must have all the information about the system user, who uses your Linux system, or managing the system. Therefore, here is a command that is called a finger.

In the Linux operating system, a command-line utility known as “finger” is used to display all available information about the system’s user.

This guide will see how to get the system’s user information through several finger command options.

GNU Screen Save Session on Reboot – Linux Hint

Linux has a utility called Screen, which allows you to use multiple terminal sessions inside a single window. Even if these get disconnected, you can start all over again from that exact spot. Therefore, our discussion topic in this article will be the process of how one can save their session in the GNU Screen utility on rebooting of their Linux systems.

How to Delete Duplicate Files in Linux with Fdupes | Tom's Hardware

As important as it is to keep your disks clear of duplicate files, finding copies of files is a tiresome job and most people don’t want to do it. This isn’t a problem if all you have are tiny text files that take up a few kilobytes each. But media files, especially raw images and HD videos can eat a lot of disk space, leaving you with less room for new data and apps.

Thankfully, the Fdupes command-line utility provides a faster and more efficient way of identifying duplicate files than just manually combing through your folders. Released under the MIT License, this nifty tool can be used to find duplicate files in the specified directories. The tool works by comparing the MD5 signature of the files, followed by a byte-to-byte comparison to ensure that all copies are identified.

In addition to tracking down duplicates, you can also use Fdupes to delete duplicate files, replace deleted files with links to the original, etc.

How to Install Apache Tomcat 10 on Debian 10 (Buster)

Apache Tomcat is free and open-source Java based HTTP Web server which offers the environment where Java code can run. In short Apache Tomcat is known as Tomcat. Recently Tomcat 10 has been released, so in this article, we will demonstrate on how to install and configure Apache Tomcat 10 on Debian 10 system.

How to Scan Documents in Linux With SANE's Most Useful Commands

Scanner Access Now Easy (SANE) is an application programming interface (API) used to control scanners and cameras. In use, the command line application, scanimage, can be used to quickly and reliably send a scanner commands to perform a number of useful functions.

How to Connect to a Ubuntu 20.04 Server via Remote Desktop Connection using xRDP - ByteXD

xRDP is an open source implementation of the Remote Desktop Protocol (RDP), developed by Microsoft. RDP allows users to establish secure connections to other computers over the internet, and use their mouse and keyboard to interact with the remote server’s graphical user interface in the same way they would interact with a regular desktop.

xRDP allows connections using RDP to machines running non-Microsoft operating systems, such as Linux or BSD.

It accepts connections from a variety of clients, such as FreeRDP, rdesktop, NeutrinoRDP and Microsoft Remote Desktop Client (for Windows, macOS, iOS and Android).

How to install and use Miniconda on Linux Mint? – Linux Hint

Miniconda is a minimalistic and free installer for conda. It includes conda, Python, and the small number of packages that the Python and conda depend on. Moreover, it also includes a small number of useful packages like requests, PIP, and many more.
Linux Mint is used for preparing this post.

Fedora Linux Broadcom b43 BCM43228 Wireless Driver Installation - nixCraft

I am using Dell / Lenovo laptop with Broadcom’s IEEE 802.11a/b/g/n based wireless card. How can I install Broadcom-wl STA BCM4322 Wireless driver on a Fedora Linux version 30/31/32/33/34? How can I install kmod-wl and BMC firmware on Fedora Linux?

Broadcom’s IEEE 802.11a/b/g/n driver can be installed on any Linux disruption including Fedora Linux version 20. This page explains how to enable and install Broadcom b43 driver under a Fedora Linux v29/30/31/32/33/34. The driver (broadcom-wl and kmod-wl) works with the following Wireless chipsets only

How to restart systemd without rebooting Linux - nixCraft

Whenever we update a critical library such as OpenSSL, we need to restart any daemons that use the library. Systemd with PID 1 itself also uses OpenSSL. How do you restart the systemd daemon without rebooting Linux and other services such as Nginx, SSHD, Firewalld? Here are some tips.

We can use various commands to determine if services or Linux daemons need restarting when critical libs are installed. On many Linux distro, services are automatically restarted. For example, when OpenSSL update is installed but services such as PHP-cgi or Apache/Nginx will not restart. So we need to hunt down those services and restart those services, including systemd.