I followed the instructions as described in an earlier Question.
I am getting the following error even when rebooting the device again and again …
theo@theo-Vostro-V13:~$ usbmuxd
theo@theo-Vostro-V13:~$ idevicepair pair
SUCCESS: Paired with device 733449309a35dd721e1e1d6e305f3cb79a52893f
theo@theo-Vostro-V13:~$ ifuse /media/iPhone
Failed to connect to lockdownd service on the device.
Try again. If it still fails try rebooting your device.
Best Answer
Problem solved; found this link: https://gist.github.com/samrocketman/70dff6ebb18004fc37dc5e33c259a0fc
The trick is to remove older packages first and to set the correct environment when building the new packages.