Dark theme enabled on Mozilla Firefox

Enable Firefox dark mode on Linux

Dark mode is all the rage these past few years, with nearly all operating systems and applications now offering the feature. Mozilla Firefox is no exception, and it’s pretty simple to enable dark mode inside the web browser. This can help reduce eye strain, especially when using your PC in a dimly lit room.

In this guide, we’ll take you through the step by step instructions to enable dark mode in Firefox on a Linux system. You’ll also see how to select from a variety of other themes or restore the classic brighter theme.

In this tutorial you will learn:

  • How to enable or disable dark mode (and other themes) in Firefox

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Firefox with title bar disabled on a Linux system

How to remove Firefox title bar on Linux

If you’re into a sleek and minimal aesthetic when it comes to Linux, removing the title bar in Mozilla Firefox can help you accomplish that feel. The title bar isn’t really necessary anyway, since it just contains information that’s already available in the title of the tabs.

In this guide, we’ll show you the step by step instructions to remove the title bar in Firefox. These same steps can also be used to toggle it back on.

In this tutorial you will learn:

  • How to remove Firefox title bar on Linux

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netbootcd grub

One CD disk, multiple Linux distributions: Netboot CD

Introduction

Every Linux user, after a while, starts creating a toolbox that he/she takes with him/her everywhere. However, that depends on the task at hand. You might need to install a distribution, you might just need a livecd, doing security-related work or just backup. And so the toolbox gets bigger and bigger, thus becoming less and less convenient. The subject of today’s article is NetbootCD. NetbootCD is not a supplement for a live Linux environment, but rather it is designed to help you install multiple Linux distributions using a single multiboot disk as oppose to requirement of 7 Linux installation disks.
In this sense NetbootCD is a CD disk that will allow you to netinstall various distributions by offering you a simple menu so you can choose distro/version and other simple options. From this reason a decent Internet connection is absolute must. You will only need the knowledge to install your distribution of choice, which nowadays is a walk in the park, with simple and easy to use installers present in many Linux distributions. We will show you how to use the NetbootCD and also how to hack it in order to add more distributions to the list, provided you have some scripting knowledge. Actually, you can use the disk also as a basic live Linux distribution, but more on that later.

Getting NetbootCD

NetbootCD is based on Tiny Core Linux, so you won’t have to get some huge ISO. One can download disk images and put it on a CD. There is also an option to put it on floppies, but that will not be dealt with here, since floppies are error-prone and almost extinct. The above link will guide you, however, should you really want to choose the floppy way. We recommend at least 512 MB of memory, more with Fedora, because the kernel and initrd images of the distros you choose will be downloaded to RAM. Now, let’s see what we get with NetbootCD.

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How to list all files installed by RPM package

The easiest way to locate all files installed from RPM package on your system is to check a RPM package manifest which shows all files and location for any particular RPM package. Let’s say that I downloaded a telnet-server-1.2-137.1.i586.rpm RPM package from some online source and I wish to see what this package contains and what files will be installed into the system. The following linux command will reveal all that information:

# rpm -qlp telnet-server-1.2-137.1.i586.rpm

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Batch image resize using Linux command line

Question

How can I batch resize multiple images using Linux command line? Is there any tool which would help me with this and/or is there GUI application which makes image resizing easy. I have hundreds of images and therefore I’m in the need for such a tool which I also can use in combination with shell scripting.

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Learning Linux Commands: cut

If you think that you can do Linux System administration without cut command, then you are absolutely right. However, mastering this fairly simple command line tool will give you a great advantage when it comes to the efficiency of your work on a user as well administration level. To simply put, cut command is one of many text-filtering command line tools that Linux Operation System has to offer. It filters standard STDIN from another command or input file and sends the filtered output to STDOUT.

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Linux kernel scheduler

Learning Linux Commands: nice & renice

Introduction

User’s ability to attach a priority value to its own process upon execution determines whether you are being nice to your fellow users on the same system. Are you being nice or you simply abuse system resources for no apparent reason? In this article you will learn how to manage your processes in terms of how much processing power they consume and how to change a priority value of your processes using nice & renice Linux command. We will start with some basic theory about what is process, process scheduling, how to fork new process and then we move to nice command and explain how to change process priority value.

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Learning Linux Commands: top

System monitoring is an important aspect of any more-or-less advanced Linux user, because there comes a time when you want to know what is taking precious resources or simply how much it does take. And despite what some people think, this is not applicable only to server systems. Desktop applications go haywire too, and you find your system slowed down to a crawl because some “rogue” app decided to eat up all your memory. For enterprise users there are lots of potent free or commercial solutions for monitoring, but for the old-school Linux user and/or someone that prefers to keep it simple, there is always top(1). If you’re somewhat familiar with the command line, you will probably benefit more from this article, but that doesn’t mean GUI-centric users won’t.

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Installing and using gentoo linux

Installing and using Gentoo Linux: Getting Started Guide for Beginners

Introduction

Installing and using gentoo linuxIf you ask around about Gentoo, chances are you will get mixed reviews : some will say it’s a waste of time, others will say it’s only for ubergeeks, yet others will tell you it’s the only way, but no one can deny the power that Gentoo offers in terms of choices and speed. Gentoo is a rolling release distribution, which means it has no release numbers and it’s updated continuously.Gentoo is also a source-based distribution, which means that everything you install you must compile first. What Gentoo is not : it certainly isn’t for everyone. If you prefer the comfort of binary package managers that install desired software on-the-fly, if you like to install your distro in an hour or so, then you might not like Gentoo. That being said, if you’re curious, aren’t afraid of the command line and some compilation, if you want to have your system just the way you want it or you just want to be more 1337, this article is just what you need. You will learn how to install, what to install, how to get the most out of your system and of course have some fun in the process. We must warn you before we start : Gentoo has some of the best written documentation of all the Linux distributions and this article cannot and does not want to take its place, by no means. Although you will have a working Gentoo system after going through our tutorial, you are advised to read the handbook and all other sections of general interest, like Portage (the software management tool), for example. That said, let’s get ready and start installing Gentoo.

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