The AppImage is a stand-alone desktop app. Run the app by double-clicking or entering in a terminal:

cd ~/Downloads # navigate to your download folder
chmod +x ./BitBox-[version]-x86_64.AppImage # make executable
./BitBox-[version]-x86_64.AppImage # to run the app

If the BitBox device is not detected by the app, you may need to manually adjust USB permissions. To do this for most recent distributions, enter the following line in a terminal (sudo access required), then replug the device:

printf "SUBSYSTEM==\"usb\", TAG+=\"uaccess\", TAG+=\"udev-acl\", SYMLINK+=\"bitbox02_%%n\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2403\"\n" | sudo tee /etc/udev/rules.d/53-hid-bitbox02.rules > /dev/null && printf "KERNEL==\"hidraw*\", SUBSYSTEM==\"hidraw\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2403\", TAG+=\"uaccess\", TAG+=\"udev-acl\", SYMLINK+=\"bitbox02_%%n\"\n" | sudo tee /etc/udev/rules.d/54-hid-bitbox02.rules > /dev/null
printf "SUBSYSTEM==\"usb\", TAG+=\"uaccess\", TAG+=\"udev-acl\", SYMLINK+=\"dbb%%n\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2402\"\n" | sudo tee /etc/udev/rules.d/51-hid-digitalbitbox.rules > /dev/null && printf "KERNEL==\"hidraw*\", SUBSYSTEM==\"hidraw\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2402\", TAG+=\"uaccess\", TAG+=\"udev-acl\", SYMLINK+=\"dbbf%%n\"\n" | sudo tee /etc/udev/rules.d/52-hid-digitalbitbox.rules > /dev/null

Or, if the above does not work for your distribution, add yourself to the 'plugdev' group (if not already a member; a reboot may be required for some distributions) and enter the following line in a terminal (sudo access required):

printf "SUBSYSTEM==\"usb\", SYMLINK+=\"bitbox02_%%n\", GROUP=\"plugdev\", MODE=\"0664\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2403\"\n" | sudo tee /etc/udev/rules.d/53-hid-bitbox02.rules > /dev/null && printf "KERNEL==\"hidraw*\", SUBSYSTEM==\"hidraw\", SYMLINK+=\"bitbox02_%%n\", GROUP=\"plugdev\", MODE=\"0664\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2403\"\n" | sudo tee /etc/udev/rules.d/54-hid-bitbox02.rules > /dev/null

printf "SUBSYSTEM==\"usb\", SYMLINK+=\"dbb%%n\", GROUP=\"plugdev\", MODE=\"0664\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2402\"\n" | sudo tee /etc/udev/rules.d/51-hid-digitalbitbox.rules > /dev/null && printf "KERNEL==\"hidraw*\", SUBSYSTEM==\"hidraw\", SYMLINK+=\"dbbf%%n\", GROUP=\"plugdev\", MODE=\"0664\", ATTRS{idVendor}==\"03eb\", ATTRS{idProduct}==\"2402\"\n" | sudo tee /etc/udev/rules.d/52-hid-digitalbitbox.rules > /dev/null

Afterwards run the following command and then replug your BitBox02

sudo udevadm control --reload 

sudo udevadm trigger

If the sha256sum checksum does not match, your browser may have requested a second level of gz compression. In this case, a clean download can be made with curl, for example:

curl -O https://github.com/digitalbitbox/bitbox-wallet-app/releases/download/v4.39.0/BitBox-4.39.0-x86_64.AppImage

If you are using Tor, the proxy information is required:

curl -O --socks5 [url]