Here's what happened: I was trying to setup KVM. So I made manual changes
regarding my network interfaces.
Somehow, KVM worked.
I don't remember why, but I had to restart my machine.
I then noticed that my bridge was finally up. I also noticed a much slower
reboot because of some network configuration message.
But then, I couldn't launch bitmask anymore, even through the terminal.
Actually, my whole connection was down.
So I commented out the changes I've made regarding network interfaces, and
made a reboot.
Now, my connection is up, but still no bitmask, even after closing the other
instances with htop.
So I decided to try Tor, since I've never really used it. It doesn't work
either.
Could not connect to Tor control port.
Beside trying to reinstall both, I have no idea what happened.
Help please !