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≡ Remarks regarding the Linux version ≡

The AppImage file format

The program is provided as an AppImage file. AppImage is a format for distributing portable software on Linux without needing to install the application; they can be run from a CD-ROM or an USB stick as well. The only requirement is that the AppImage file has to be marked as “executable” (this can be done using the file's context menu or in a terminal session with the command “chmod a+x Rotad.AppImage”). As the AppImage file includes all needed libraries, the program runs on all common Linux distributions. Only on very old (and outdated) distributions FUSE might be missing; in this case the AppImage file can be extracted and the program can be started manually.

The program has been tested with the following distributions: CentOS 6.10 (32 bit and 64 bit), CentOS 7 (32 bit and 64 bit), CentOS 8.2.2004 (64 bit); Debian 05.0.10 (32 bit and 64 bit), Debian 06.0.10 (32 bit and 64 bit), Debian 07.11.0 (32 bit and 64 bit), Debian 08.11.1 (32 bit and 64 bit), Debian 09.13.0 (32 bit and 64 bit), Debian 10.6.0 (32 bit and 64 bit); Ubuntu 12.04.5 (32 bit and 64 bit), Ubuntu 14.04.6 (32 bit and 64 bit), Ubuntu 16.04.6 (32 bit and 64 bit), Ubuntu 18.04.5 (64 bit), Ubuntu 20.04.1 (64 bit).

The files “Rotad.cfg” and “Rotad.log”

The program creates two files: the “Rotad.cfg” configuration file and the “Rotad.log” log file. These files will be created in the home directory of the current user.

Permissions for hardware access

On Linux, the program needs special permissions to access the USB module which is responsible for the communication between the dynamometer and the computer. This can be achieved in one of three ways:
① Run the program with “sudo”.
② Every time (!) after connecting the USB module to the computer, execute “sudo chmod 0666 /dev/usb/iowarrior*”.
③ Create a file “10-iowarrior.rules” in the directory “/etc/udev/rules.d” consisting of the following line: “KERNEL=="iowarrior*", NAME="usb/iowarrior%n", GROUP="users", MODE="0666"” (this might need additional steps depending on your Linux distribution).

Contact: Christian Gärtner (  |  Imprint