I can't make any group using the ctrl + number shortcut. For some reasons, the number 1 moves the camera up, other numbers do nothing. This works well on the windows version of the game but not ont the linux version. Tested on Manjaro.

Update : it's working switching to qwerty keyboard layout. Guess numbers are not recognized correctly using azerty layout. Typing numbers requires to use shift + number key in azerty mode. Ctrl + shift + number does not works either to make groups of units. Hope you could fix this.