I found that Ubuntu Tweak Tool 0.8.7 has been released, but I went to the official website to check whether it was Ubuntu Tweak Tool 0.8.6. As a result, I installed it with Ubuntu Tweak Tool 0.8.7, compared with 0.8.6, 0.8.7 has added support for Ubuntu 14.04, for example, the starter clicks to minimize the APP, whether to enable the Guest account, and whether to enable the dot matrix (that is, the login interface's tips) A lot of bugs have been fixed at the same time. You can try again.
Ubuntu 14.04 download, installation, and configuration summary page
Install Ubuntu 14.04 on a hard drive in Windows 7. Permanent update address:
PPA installation:
Sudo add-apt-repository ppa: tualatrix/ppa
Sudo apt-get update
Sudo apt-get install ubuntu-tweak
Tip: If you have installed version 0.8.6, you do not need to uninstall it. You only need to execute the above command to upgrade it to version 0.8.7.
After installation, search for Ubuntu Tweak on the Dash panel to start it.
To uninstall the software, run the following command:
Sudo apt-get remove ubuntu-tweak
Run the following command to remove PPA:
Sudo apt-get install ppa-purge
Sudo ppa-purge ppa: tualatrix/ppa