lesslinux.org Development Blog

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That was fast! Stable build based on kernel 3.13.2 available

February 10th, 2014 Packages and Architecture, Releases | Kommentieren »

Right at this moment I am uploading the first stable build based on Kernel 3.13.2. I am very happy that everything compiled nice with the 3.13.2 kernel headers. Besides this the changes to the 3.12 series builds are quite small:

  • Firefox got updated to 27.0
  • Thunderbird got updated to 24.3.0
  • QPhotoRec is now present with a menu entry
  • Added vshadowinfo/vshadowmount – a nice small tool to access V-Shadow Snapshots on NTFS drives
  • Fix to Adwaita theme’s look on applications run with root privileges

If you installed LessLinux Search and Rescue to a thumb drive you probably noticed an empty “partition 7″ that seemed to be without use. This partition is intended for updates. When updating a binary delta file will be downloaded. Then the content of “partition 8″ together with the binary delta will be streamed through Xdelta and saved on “partition 7″. After this, boot information will be rewritten and you are prompted to reboot. On the next update the same will be done the other way round. This build will be the first stable build fully supporting this update mechanism. This means: You have to prepare your thumbdrive once and will be prompted to update if one is available. Since the update will be streamed to the other partition, you do not have to restart programs during update, just continue to work.

And what’s next

These are some features to expect from the near future, see it primarily as a todo list for me:

  • Add a usable IceWM configuration for more conservative users
  • Further clean up nonfree packages
  • Build a “full” ISO for self containing builds
  • Update the documentation on building
  • Move to Xorg server 1.15, Mesa 10, GStreamer 1.2 and GNU make 4.0
  • Move to glibc 2.19
  • Add a BOOTIA32.EFI to boot on bay trail tablets
  • Continue to work on building full 64 bit systems
  • Continue to work on support for RaspberryPi

Download it here: lesslinux-search-and-rescue-uluru-20140209-200536.iso

Fresh stable build based on kernel 3.12.9 available

February 7th, 2014 Packages and Architecture, Releases | Kommentieren »

I just uploaded a build from three days ago. This features all the previously mentioned changes regarding moving to Gtk+ 3. The “weight penalty” by using both Gtk+ versions should be around 20MB. That’s reasonable for having a working upgrade path.

Other changes include:

  • Many fixes to VLC 2.1.2 – you want to check if the videos rescued from a failed drive are still OK
  • Added Audacious – I like to listen to MP3s when doing long annoying jobs
  • Added some casual games – customers asked me to do so
  • Added wimlib – allows creation and access of WIM files
  • Added qemu – not primarily for virtualization, but for creation of and access to image files like VDI and VMDK
  • Added multipath tools – mainly for kpartx, for convenient access of partitions in hard disk images
  • Added cabextract – to extract Windows drivers from cabinet files

Combine the last four tools in some scripts (mix in the registry editing capabilities of ntpasswd) and you get cool options for either deployment of Windows images or using LessLinux as a semi automated tool for converting Windows installations running on real hardware to virtual machine images.

However this build is just a stopgap. The update to kernel 3.13.2 seems so smooth that I think the next week will provide a first testing image based on 3.13.2.

Download here: download.lesslinux.org/releases/lesslinux-search-and-rescue/lesslinux-search-and-rescue-uluru-20140204-161107.iso

Fresh development build with kernel 3.12.6 available

January 8th, 2014 Packages and Architecture, Releases, Screenshots | Kommentieren »

I just uploaded a fresh development build that uses kernel 3.12. The biggest change however ist the move to Gtk3 for some applications.

The new desktop with some Gtk3 applications

Mehr »

Major changes ahead: Moving to Gtk3

November 29th, 2013 About, Packages and Architecture | Kommentieren »

You probably noticed that LessLinux uses Gtk2 only. Even applications like Abiword, Gnumeric and some of the Gnome tools are older versions – some three years old, partially taken from Gnome 2.32. The background of this decision was to provide a persistent look and feel as well as to keep the size smaller.

This is not suitable anymore.

I had to decide between moving to the Mate libs or to Gtk 3. Mate is a fork of the last stable Gnome. This move would probably have given me some updated utilities and libraries but it would not have an provided newer applications like Brasero, Abiword or Gnumeric. So I decided to move to Gtk3. I already moved the easier to move applications like Zenity, Brasero, Abiword, Gnumeric and Evince. Wireshark and the likes will follow soon. Then I will provide images for testing. Afterwards, I will move Ruby-Gnome and the WX based apps like FileZilla and TrueCrypt to Gtk3. However, some Gtk2 programs will stay for a while: Firefox will keep Gtk2 as default for a while and XFCE will not move to Gtk3 in the upcoming version 4.12. At least a version of LessLinux Search and Rescue will be possible that uses Nautilus, Openbox and Midori that will be Gtk3 only.

New stable build with kernel 3.11.7 available

November 14th, 2013 Releases | Kommentieren »

Nothing spectacular here. Just a fresh stable build. It uses kernel 3.11.7, still sticks with Glibc 2.17 and re-enables the rtl8192se driver. Zswap is enabled which is a great thing for live CDs without swap space.

I am now moving on to kernel 3.12 together with Glbic 2.18 and GCC 4.8.2, but if necessary, another build based on 3.11.8 will follow.

Download this build here:

Fresh development build with kernel 3.11.5 available

October 17th, 2013 Releases | Kommentieren »

I am proud to announce a fresh development build. This one targets some minor issues in older builds and adds the new kernel from the 3.11 family. However glibc is still 2.17 since I had problems with my cross compilers build with 2.18. The issues adressed are:

  • Workaround for sound devices with too strict permissions
  • The USB installer now also creates an encrypted swap partition: The swap partition is re-initialized at each boot with a key that is thrown away afterwards
  • Gummiboot is updated to 36 to work around keyboard issues on some UEFI implementations
  • The layout of the DVD is much friendlier for remastering (kernels are now in /boot/kernel, not in /boot/isolinux anymore)
  • A new mechanism for loading to memory just loads to memory if the system is started from optical media an the main memory is larger than size of the ISO plus 1GB – so the DVD burner can be used to backup important data – when used from thumb drive the system is not loaded to main memory

The Realtek WiFi driver rtl8192se that stopped working in linux 3.10 works again with 3.11. However I left it blacklisted for this build. Load it manually with “modprobe -v rtl8192se” if you have an affected card. I also did make some major improvements for speeding up builds. Large parts of the system can now be built distributed with distcc. This together with some fresh tests of self contained builds will be covered in an upcoming post.

Download the test build here: lesslinux-search-and-rescue-uluru-20131017-082921.iso

Fresh stable release available

August 22nd, 2013 Releases, Screenshots | Kommentieren »

I just uploaded a fresh stable release. There are no big changes regarding the development build from two weeks ago. The linux kernel now is 3.9.10, Firefox and Thunderbird were also updated. Two small new features are integrated:

USB installer

Install LessLinux search and rescue to a thumb drive. In the installer you can select the default language and specify if an encrypted /home partition should be created. The latter feature is especially handy if you want to store some browser bookmarks or WiFi keys.


Webdav is a nice thing, especially since many providers like Deutsche Telekom or GMX are offering cheap or free Webdav drives. I included the command line client mount.davfs. Currently no certificates are installed and in the mid term I want to provide a simple GUI.



As alwas you can download the ISO image lesslinux-search-and-rescue-uluru-20130822-085558.iso from download.lesslinux.org. Burn it to DVD, write it to a thumbdrive with “dd” or Win32DiskImager.

New development build with kernel 3.10.5 available + new tools

August 8th, 2013 Cheatcodes, Releases, Screenshots | Kommentieren »

The last weeks saw many improvements that especially targetted reliability. As you probably know, LessLinux contains a feature called “ISOhybrid conversion”: Official ISO images are valid HDD images as well, so you can either burn them on a DVD or “dd” them to a thumb drive (Windows users will take Win32DiskImager to write to an USB drive). Upon first boot, the ISO image is move to the end of the thumb drive and some partitions are created – so part of the thumb drive is still writable and the boot configuration is editable.

More reliability on cheap USB flash drives

During the last weeks I ran into problems with some cheap USB thumb drives: continously reading 8MB and instantly writing them somewhere else often resulted in some flipped bits. Thus I introduced some checks: First, and upon each boot, the binary files in the initramfs (BusyBox, some statically linked binaries, firmware files and kernel modules) are checked and upon failure the system shuts down. Then before doing the ISOhybrid conversion boot files (kernel and initramfs) and the SquashFS containers are checked. During the conversion each block is checked after writing: if moving fails, it is tried again. Some very cheap thumb drives that formerly resulted in nearly 20% corrupt installations are now down to 2%.

Another big change in ISOhybrid conversion is, that we are now very generous with available space: In addition to the last partition for the ISO image, another partition in front of it is created. Both use 125% of the space of the ISO – yes, 250% together. The intention behind this is, that updates are handled much easier this way: The old ISO image can now be piped through Xdelta3 and the STDOUT can be written to the empty partition. As a result, I will begin to offer updates between stable releases from now on.

Encrypted /home

I re-activated a feature that was introduced some three years ago, but could only be used by creating a container file by hand. If you now specify the cheat code


upon first boot, during ISOhybrid conversion a partition with between 512MB and 1.5GB is created and later used for storing the contents of the home directory and settings for WICD. Reasonable sizes for the /home directory are between 256MB and 64GB (if you install to a USB hard disk and have some large directories in your /home directory, e.g. Thunderbird will full IMAP caching).

Remove ransomware from registry

Some ransomware writes a shell entry that cannot be removed from a running windows system. I was disappointed with license and usability of Kasperskys ransomware removal tool, so I wrote one myself: This tool scans all your hard disks for Windows installations (currently XP, Vista, 7 and 8 are supported, 8.1 might work as well), then it reads the shell entries and gives you a button to reset the shell to the default “explorer.exe”.

Some Eyecandy, notes on network

I created some commonly used functions for displaying a progress bar during startup and ISOhybrid conversion. Sadly, kernel 3.10.5 contains some bugs in some wireless staging drivers that result in no connection or crashes (especially sad when considering those drivers worked in 3.9.11), so I had to blacklist rtl8192se. To speed up boot, ethernet drives are loaded after udev is started. If you intend to netboot lesslinux, please take a look in the handbook.


Download the build lesslinux-search-and-rescue-uluru-20130807-124945.iso and burn it to DVD or use “dd” or Win32ImageWriter to write it to a thumb drive.

 PS: This build still uses Firefox 22.0 and Thunderbird 17.0.8, some pending updates on the Xorg subsystem are not yet included and I plan to add and configure GRUB as an alternative bootloader on UEFI systems (in the mid term, this should reduce the size of ISOs by ~50MB). So now you know why the build is labeled testing. From the stability standpoind there are no reasons (besides the broken WiFi drivers) not to use it.

Fresh stable build available: Kernel 3.9.4, UEFI Support and many more

May 28th, 2013 Packages and Architecture, Releases, Screenshots | Comments Off

After kernel 3.8.13 was declared EOL I switched to kernel 3.9 and moved the build system to GCC 4.8.0. Besides the new kernel this release adds lots of changes and improvements. Mehr »

Fresh build with UEFI support (including secure boot) available

May 13th, 2013 Releases | Comments Off

I just completed a fresh build based on kernel 3.8.12 and GCC 4.7.2 that introduces support for secure boot. The ISO now supports four modes: If burned to a DVD it boots on BIOS and UEFI machines – the same when written to a USB thumb drive. Many thanks to Thomas Schmitt of Xorriso fame for helping me to accomplish this. I have also rewritten the scripts that do the conversion from the raw ISO written to thumbdrive from a MBR partitioned HDD to a GPT partitioned disk with two boot partitions – one for UEFI and one with legacy MBR for BIOS.

UEFI should work flawless on most machines, you just have to add the hash of the kernel /l308sf.efi to your MOK database – upon first boot you are prompted to do so. There are still some features that are not yet complete. For example the safe startup or options for VNC access are not yet included into the boot menu used on UEFI machines. The build is generally considered “Gamma” quality. I assume there won’t be more builds based on kernel 3.8 since this is declared deprecated. I have begun moving to 3.9, so expect some Beta builds based on 3.9 and GCC 4.8 soon.

There will be some major changes for builders ahead. If you plan to do builds based on this or later releases, please contact me.