change default terminal apps on linux ubuntu/debian

~$ sudo update-alternatives --config x-terminal-emulator

[sudo] password for niam: 

There are 2 choices for the alternative x-terminal-emulator (providing /usr/bin/x-terminal-emulator).


  Selection    Path                             Priority   Status

------------------------------------------------------------

* 0            /usr/bin/gnome-terminal.wrapper   40        auto mode

  1            /usr/bin/gnome-terminal.wrapper   40        manual mode

  2            /usr/bin/tilix.wrapper            30        manual mode


Press <enter> to keep the current choice[*], or type selection number: 2

update-alternatives: using /usr/bin/tilix.wrapper to provide /usr/bin/x-terminal-emulator (x-terminal-emulator) in manual mode