Change the default terminal emulator in Ubuntu
- Create symbolic link to x-terminal-emulator
sudo update-alternatives --install /usr/bin/x-terminal-emulator x-terminal-emulator /PATH/TO/YOUR/TERMINAL 1
- Select your terminal to use as default
sudo update-alternatives --config x-terminal-emulator
Restore and remove the alternative link
sudo update-alternatives --remove x-terminal-emulator /PATH/TO/YOUR/TERMINAL