How do I change the shortcut-key of show the unity dash?

Solution 1:

Open the Terminal and execute the following command:

dconf write /org/compiz/profiles/unity/plugins/unityshell/show-launcher '"<Alt>space"'

To read the current value, use read option:

dconf read /org/compiz/profiles/unity/plugins/unityshell/show-launcher

If you want to set it to default value, use reset option as following:

dconf reset /org/compiz/profiles/unity/plugins/unityshell/show-launcher

From man dconf:

dconf read KEY
dconf write KEY VALUE
dconf reset [-f] PATH

• read : Read the value of a key.
• write: Write a new value to a key.
• reset: Reset a key or an entire directory. For directories, -f must be specified.

Solution 2:

You can use CCSM (CompizConfig Settings Manager) to set which shortcut opens the dash or to disable it.

sudo apt-get install compizconfig-settings-manager

Then from the terminal start it by executing ccsm, find the Ubuntu Unity Plugin and select the Launcher tab. Disable the "Key to show Dash..." shortcut.