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Linux

New Videos: A Look at Xubuntu 19.10 and Crunchbang++ 10

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GNU
Linux

Get to know Oracle Linux Virtualization Manager

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Linux

Linux Virtualization Manager can manage multiple on-premises hosts running Oracle Linux KVM. Oracle enhanced Linux KVM in the Unbreakable Enterprise Kernel (UEK) Release 5, an OS kernel tested and optimized for Oracle Linux 7 Update 5.

Because Linux KVM is the same hypervisor used for Oracle Cloud Infrastructure, admins have an easy migration path from the Linux Virtualization Manager environment to the Oracle Cloud platform. Linux Virtualization Manager also supports importing and exporting software appliances based on the Open Virtualization Format and Open Virtualization Archive standards.

Oracle based Linux Virtualization Manager on the oVirt project, an open source virtualization platform developed by Red Hat. Linux Virtualization Manager relies on the oVirt engine for discovering KVM hosts and configuring storage and network resources. The platform supports KVM administration for multinode environments, offering a large-scale, centralized management platform for server and desktop virtualization.

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Linux Fu: Python GUIs For Command Line Programs (Almost) Instantly

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Development
GNU
Linux
HowTos

Not every programmer likes creating GUI code. Most hacker types don’t mind a command line interface, but very few ordinary users appreciate them. However, if you write command line programs in Python, Gooey can help. By leveraging some Python features and a common Python idiom, you can convert a command line program into a GUI with very little effort.

The idea is pretty simple. Nearly all command line Python programs use argparse to simplify picking options and arguments off the command line as well as providing some help. The Gooey decorator picks up all your options and arguments and creates a GUI for it. You can make it more complicated if you want to change specific things, but if you are happy with the defaults, there’s not much else to it.

At first, this article might seem like a Python Fu and not a Linux Fu, since — at first — we are going to focus on Python. But just stand by and you’ll see how this can do a lot of things on many operating systems, including Linux.

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Also: Applying C - Running Programs With Systemd

My Linux story: I grew up on PC Magazine not candy

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Linux

In 1998, the movie Titanic was released, mobile phones were just a luxury, and pagers were still in use. This was also the year I got my first computer. I can remember the details as if it were yesterday: Pentium 133MHz and just 16MB of memory. Back in that time (while running nothing less than Windows 95), this was a good machine. I can still hear in my mind the old spinning hard drive noise when I powered that computer on, and see the Windows 95 flag. It never crossed my mind, though (especially as an 8-year-old kid), that I would dedicate every minute of my life to Linux and open source.

Being just a kid, I always asked my mom to buy me every issue of PC Magazine instead of candies. I never skipped a single issue, and all of those dusty old magazines are still there in Costa Rica. It was in these magazines that I discovered the essential technology that changed my life. An issue in the year 2000 talked extensively about Linux and the advantages of free and open-source software. That issue also included a review of one of the most popular Linux distributions back then: Corel Linux. Unfortunately, the disc was not included. Without internet at home, I was out of luck, but that issue still lit a spark within me.

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How to Create Persistent Fedora LIVE USB From Ubuntu

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Linux

This quick tutorial explains how to create persistent LIVE USB using Fedora Operating system in Ubuntu.

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Apple of 2019 is the Linux of 2000

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GNU
Linux
Mac

Last week the laptop I use for macOS development said that there is an XCode update available. I tried to install it but it said that there is not enough free space available to run the installer. So I deleted a bunch of files and tried again. Still the same complaint. Then I deleted some unused VM images. Those would free a few dozen gigabytes, so it should make things work. I even emptied the trash can to make sure nothing lingered around. But even this did not help, I still got the same complaint.

At this point it was time to get serious and launch the terminal. And, true enough, according to df the disk had only 8 gigabytes of free space even though I had just deleted over 40 gigabytes of files from it (using rm, not the GUI, so things really should have been gone). A lot of googling and poking later I discovered that all the deleted files had gone to "reserved space" on the file system. There was no way to access those files or delete them. According to documentation the operating system would delete those files "on demand as more space is needed". This was not very comforting because the system most definitely was not doing that and you'd think that Apple's own software would get this right.

After a ton more googling I managed to find a chat buried somewhere deep in Reddit which listed the magical indentation that purges reserved space. It consisted of running tmutil from the command line and giving it a bunch of command line arguments that did not seem to make sense or have any correlation to the thing that I wanted to do. But it did work and eventually I got XCode updated.

After my blood pressure dropped to healthier levels I got the strangest feeling of déjà vu. This felt exactly like using Linux in the early 2000s. Things break at random for reasons you can't understand and the only way to fix it is to find terminal commands from discussion forums, type them in and hope for the best. Then it hit me.

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Linux 5.4-rc3

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Linux
Things continue to look fairly normal, with rc3 being larger than rc2,
as people are starting to find more regressions, but 5.4 so far
remains on the smaller side of recent releases.

The diffstat looks fairly flat too, although we had a couple of
staging drivers being removed here that show up as spikes. Drivers in
general account for about two thirds of the diff, and it's not just
those staging drivers, it's other small noise all over the place: usb,
drm, iio, rdma..

Outside of drivers, filesystems pop up more than perhaps usual, but
it's again mostly low-grade noise all over: btrfs, cifs, nfs, ocfs,
xfs and some core vfs fixes.

The rest is arch updates (mainly arm64, x86, mips), tooling (mostly
perf tooling updates, but also some selftest fixlets), documentation,
and misc core kernel and mm stuff.

There really isn't anything huge that stands out. You can scan the
appended shortlog for a flavor of the details, it's not too long to
just scroll through.

Linus

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Also: Linux 5.4-rc3 Released Ahead Of Official Kernel Debut In November

Archman GNU/Linux Xfce 2019-09

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GNU
Linux
Reviews

Archman is an Arch Linux-based distribution developed in Turkey. The project's website is available in both Turkish and English, which makes the distribution approachable to non-Turkish audiences. Archman has various releases with different desktop environments and release dates. In this review, I will be reviewing Archman's Xfce 2019-09 release, which is codenamed Lake With Fish.

To begin, I downloaded the 1.6GB ISO and copied it to a flash drive. I rebooted my computer, turned off Secure Boot, and started Archman from the flash drive. The boot process was quick, but I ended up at a graphical login screen instead of a working desktop environment. I pressed the Enter key and I logged in without needing a password.

The live desktop looked very nice. It is an interesting blend of classic and modern. The live desktop has icons for the user's home folder and Trash. There is also a shortcut for Hexchat and the Calamares Archman Installer. The panel at the bottom of the screen holds the application menu, shortcuts for showing the desktop/quickly minimizing all running applications, Firefox, the user's home folder, sections for the currently running applications, switching desktops, a clock, Bluetooth and wireless controls, a battery meter, update notifications, volume control, and a log out/reboot/shutdown shortcut. The panel is 70% the width of the screen and set to automatically hide.

I looked around the live desktop for a little while. I tested to make sure that everything was working okay with my hardware, and once I was certain that all my hardware worked, I moved on to installing Archman.

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This Website Lets You Test Linux Distros Right from Your Browser

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GNU
Linux

If you are an avid Linux user who hops distros every weekend, it can be confusing at times to pick a distro to install. Well, not anymore. There exists a website named DistroTest that lets you test Linux operating systems from your web browser without requiring any sort of installation so that you can get a better idea regarding what to expect from the operating system without even downloading it.

The website offers 807 versions of Linux distros across 244 operating systems and hence, it is more likely that the distro you’re planning to check out will have its version on DistroTest. Cool, right?

The best part is, it won’t ask any of your personal information and will not require you to create an account on the website. This way, you don’t have to worry about any privacy-related risk.

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10 Ways to Customize Your Linux Desktop With GNOME Tweaks Tool

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Linux
GNOME

There are several ways you can tweak Ubuntu to customize its looks and behavior. The easiest way I find is by using the GNOME Tweak tool. It is also known as GNOME Tweaks or simply Tweaks.

I have mentioned it numerous time in my tutorials in the past. Here, I list all the major tweaks you can perform with this tool.

I have used Ubuntu here but the steps should be applicable to any Linux distribution using GNOME desktop environment.

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More in Tux Machines

New Videos: A Look at Xubuntu 19.10 and Crunchbang++ 10

Debian and Ubuntu Leftovers

  • Ritesh Raj Sarraf: Bpfcc New Release

    bpfcc version 0.11.0 has been uploaded to Debian Unstable and should be accessible in the repositories by now. After the 0.8.0 release, this has been the next one uploaded to Debian.

  • Utkarsh Gupta: Joining Debian LTS!

    Back during the good days of DebConf19, I finally got a chance to meet Holger! As amazing and inspiring a person he is, it was an absolute pleasure meeting him and also, I got a chance to talk about Debian LTS in more detail. [...] I had almost no idea what to do next, so the next month I stayed silent, observing the workflow as people kept committing and announcing updates. And finally in September, I started triaging and fixing the CVEs for Jessie and Stretch (mostly the former). Thanks to Abhijith who explained the basics of what DLA is and how do we go about fixing bugs and then announcing them. With that, I could fix a couple of CVEs and thanks to Holger (again) for reviewing and sponsoring the uploads! :D

  • Ubucon Europe 2019 in local media

    News from the new Ubuntu distribution, the exploration of the several platforms and many “how to”, rule the 4-days agenda where the open source and open technologies are in the air. The Olga Cadaval Cultural centre in Sintra, is the main stage of a busy agenda filled with several talks and more technical sessions, but at Ubucon Europe there’s also room for networking and cultural visits, a curious fusion between spaces full of history, like the Pena Palace or the Quinta da Regaleira, and one of the youngest “players” in the world of software. For 4 days, the international Ubuntu Community gathers in Sintra for an event open to everyone, where the open source principles and open technology are dominating. The Ubucon Europe Conference begun Thursday, October 10th, and extends until Sunday, October 13th, keeping an open doors policy to everyone who wants to Afterall, what is the importance of Ubucon? The number of participants, which should be around 150, doesn’t tell the whole story of what you can learn during these days, as the SAPO TEK had the opportunity to check this morning. Organised by the Ubuntu Portugal Community, with the National Association for Open Software, the Ubuntu Europe Federation and the Sintra Municipality, the conference brings to Portugal some of the biggest open source specialists and shows that Ubuntu is indeed alive, even if not yet known by most people, and still far from the “world domain” aspired by some.

Devices/Embedded: Win Enterprises and Raspberry Pi 4

  • Win Enterprises unveils Atom-based LAN gateway and compact SBC

    Win Enterprises unveiled a fanless “PL-82000” networking gateway with 6x GbE and 2x SFP ports based on an Atom C3000. It also launched a Raspberry Pi sized “MB-5000” SBC that runs Ubuntu or Win 10 on Intel Apollo Lake. We tend to forget Win Enterprises because as its name suggests, the company typically sticks to Windows-supported products. Yet, they have increasingly produced barebones products without listed OS support, such as the new PL-82000 networking appliance, as well as Linux supported systems such as the MB-5000 SBC announced back in June. (In 2017, we covered an Intel Bay Trail based MB-80580 SBC and Win IoT-380 Gateway with Linux support.)

  • Raspberry Pi 4 PCI Express: It actually works! USB3, SATA… GPUs?

    Recently, Tomasz Mloduchowski posted a popular article on his blog detailing the steps he undertook to get access to the hidden PCIe interface of Raspberry Pi 4: the first Raspberry Pi to include PCIe in its design. After seeing his post, and realizing I was meaning to go buy a Raspberry Pi 4, it just seemed natural to try and replicate his results in the hope of taking it a bit further. I am known for Raspberry Pi Butchery, after all.

  • Raspberry Pi 4 B+ - PCI Express

    Why did I do it? Because I wanted to see if it can be done. Because Raspberry Pi 4 might be the cheapest device that is PCIe capable after a relatively minor modification (if I didn't lift the capacitors when desoldering the VL805, this is literally 12 soldering points). That, in turn, can be quite handy for developing own PCIe cores for various FPGA based experiments.

    I'm sharing it to allow people to learn from this - and to dispel the myth that PCIe is somehow out of reach of hobbyists due to some concerns over signal integrity or complexities. Stay tuned for more Pi4/PCIe experimentation!

OSS: Odoo, WordPress, MongoDB vs. MySQL

  • What's New in Odoo 13?

    Fast, Simple and Effective Business Management- this is the motto of Odoo, the leading open source ERP of the globe. And this is what makes Odoo the prominent and most favorite choice among business enterprises. With the release of Odoo 13, the open-source ERP has become all more fit and robust to meet the diversified needs of businesses. With Odoo 13 users can go along with better designs and customizations. With each version release, Odoo makes it a point to bring in major and minor improvements in the application, alongside a set of new features for improving the user interface and functionality of the user. The users worth 3.4 million is the evidence of Odoo being the finest application for business management.

  • Becoming Better Digital Citizens Through Open Source

    The WordPress Project is on a mission to democratize publishing. As WordPress empowers more people to participate in the digital space, we have the opportunity to make sure that everyone can participate safely and responsibly. Today marks the start of Digital Citizenship Week. We are going to share how open source can be used as a tool for learners (regardless of age) to practice and model the essential parts of being a good digital citizen. [...] Digital Citizenship is for all age groups. Anyone who uses the internet on a computer, mobile device or a TV is a digital citizen. You don’t have to be tech-savvy already, maybe you are taking your first steps with technology. Digital Citizenship Week is a chance to reflect together on our impact on the digital world. It can help us to make our consumption more considered and our interaction friendlier. It enables us to make a positive difference to those around us. All of us can strive (or learn) to become better digital citizens. It can be affected by the access those teaching have had to digital skills and good practice. Adult education classes and community tech hubs play a part in basic tech skill development. Unfortunately, these are not always accessible to those in less populated geographic locations.  Open source communities like WordPress already make a difference in encouraging the principles of digital citizenship, from sharing tech skills to improving security knowledge. They give people an opportunity to learn alongside their peers and many of the resources are available regardless of location, resources, or skills.

  • MongoDB vs. MySQL: How to choose

    During the dot-com bubble in the 1990s, one common software stack for web applications was LAMP, which originally stood for Linux (OS), Apache (web server), MySQL (relational database), and PHP (server programming language). MySQL was the preferred database mostly because it was free open source and had good read performance, which fit well with “Web 2.0” apps that dynamically generated sites from the database. Later the MEAN stack, which stood for MongoDB (document database), Express (web server), AngularJS (front-end framework), and Node.js (back-end JavaScript runtime), came to prominence. The MEAN stack was attractive, among other reasons, because the only language you needed to know was JavaScript. It also needed less RAM than an equivalent LAMP stack.