How can I set default terminal used in Unity?

Solution 1:

For 12.04 and newer

gconf is now deprecated - http://en.wikipedia.org/wiki/GConf - and gsettings can be used in its place.

gsettings set org.gnome.desktop.default-applications.terminal exec 'terminal'

Where terminal is the command you would use to open it from the terminal.

Solution 2:

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

Solution 3:

Only in Ubuntu 11.10 or earlier! For newer versions see LucaB answer!

Open a terminal (e.g. gnome-terminal)

Run the next command:

gconftool --type string --set /desktop/gnome/applications/terminal/exec <YOUR-TERMINAL>

e.g.:

gconftool --type string --set /desktop/gnome/applications/terminal/exec terminator

Done :).

Solution 4:

To change the shortcut and not default termainal,

1. search for keyboard
2. go to shortcuts and custom shortcuts
3. press the plus sign to add new shortcut (in this case terminator)
4. when told that the shortcut ctrl+alt+t is already in use press "reasign"