I keep PorteuX on a USB for one reason

PorteuX on – PorteuX is a portable Linux distribution based on Slackware that’s easy to install from an ISO onto a USB—on both Linux and Windows—and it can even install apps. The real test came during repeated attempts to run it in virtual machines, where read-only mounts

There are days when you just need Linux on whatever machine is in front of you—fast. Maybe it’s an office where networking is acting up and the only computer available runs Windows 11. a system the writer says he doesn’t like nor want to use. Or maybe it’s a friend’s house. and the goal is simple: show someone what Linux looks like and what it can do.

In those moments, the plan is always the same. A portable Linux distribution on a USB drive—one you can boot and use immediately. And after trying many portable distros over the years, the writer says PorteuX may be the best.

PorteuX is a portable Linux distribution based on Slackware. It’s built to be easy to run. and the writer stresses that you don’t have to go through the usual process of creating a Live Linux device. Instead, you can copy the contents of the ISO image to the media storage. Then you change into the /boot folder on the USB device and run either porteux-installer-for-linux.run on Linux or porteux-installer-for-windows.exe on Windows—creating a bootable USB.

There’s a catch with tools like Rufus, uNetBootin, or Etcher. If you use them, the bootable unit will be set to read-only, and there will be no persistent storage.

What also stands out is that PorteuX supports several desktop environments: Cinnamon, COSMIC, GNOME, KDE, LXDE, LXQt, MATE, and Xfce. The writer opted to test the COSMIC version of PorteuX, saying he was impressed after comparing it to System76’s COSMIC desktop.

The other practical advantage is software installation. Some portable Linux distributions are locked down, but PorteuX isn’t. From the desktop menu, there’s an entry called PorteuX App Store. The writer says it lets you install web browsers. virtual machines. drivers. office suites. graphics tools. games. messengers. and utilities—though he adds the list isn’t exhaustive.

When apps are installed, you’ll be prompted for the root password, which is toor. The standard username/password is guest/guest.

If the app you need isn’t in the app store, there’s also the command-line tool getpkg. The writer provides an example command for installing GIMP: getpkg -m gimp. He adds that you can install Flatpak the same way—using getpkg -m flatpak—but after installing Flatpak you have to set up a writable directory.

The steps are straightforward in his example: create the directory with sudo mkdir /flatpak. then run sudo flatpak –force-setup /flatpak. and add the Flathub repository using flatpak remote-add –if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo. Once Flatpak is installed and Flathub is added, he shows an example of installing Spotify with sudo flatpak install spotify.

One more detail matters here: the writer notes that normally you don’t install Flatpaks with sudo elevation, but on PorteuX, it’s necessary. He says he resolved that by creating the flatpak directory in /home/guest.

Performance is another point of confidence. Even though PorteuX runs entirely in RAM. he says it’s very snappy—fast enough that “you’d never know that the OS is running in memory.” He also ties expected speed to the system specs and the desktop environment. For older machines, he recommends LXQt, LXDE, or Xfce. For systems with plenty of CPU and memory, he says performance will be impressive with any of the desktop environments.

But the real lesson came when he tested it in virtual machines. The writer typically tests Linux distributions as virtual machines using KVM/Virt Manager or VirtualBox, and he did the same with PorteuX after finding it as an .iso image. His assumption was that it would work fine.

It didn’t.

PorteuX is designed to run on portable storage like USB drives. When he ran it as a VM, the directories were mounted read-only. That created issues for installing software—specifically via Flatpak—and also caused problems with installing modules through the PorteuX app store.

There was also a storage issue tied to virtual machine behavior. He explains that a virtual machine can be created with an 80 GB virtual drive, but that drive isn’t automatically 80 GB in size. Instead, it grows as needed without exceeding the 80 GB limit you set.

Then there was the boot behavior. When he shut down the VM, he had to recreate it because it couldn’t find a bootable device. In his testing, this issue was isolated to KVM/Virt-Manager. With VirtualBox, he says the experience was different: he could boot, shut down, and reboot.

Even so, he says VirtualBox was still much easier and more reliable than running PorteuX under KVM/Virt-Manager.

After dealing with those VM problems, he chose to skip the virtual machine route and use PorteuX as suggested—booting from portable storage. He says that decision fixed everything.

By the end, his conclusion is clear. Even with the VM headaches, he found PorteuX one of the best portable Linux distributions he’s used. He says it’s faster than many other portable distros. and because it’s easier to create as a live USB distribution on both Linux and Windows. it “gets the nod” over others.

Now he keeps a USB flash drive with PorteuX Linux ready to go, carrying it everywhere so he can boot Linux on any PC when the need shows up.

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