How to install fonts and toggle default fonts in Ubuntu system

Reference Link: http://my.oschina.net/itblog/blog/278566

Open Ubuntu Software Center, search: Tweak, install the "Unity tweak Tool" This software, (because I put the two steps of this article is finished to cut the figure, so the various forms of font has been I set as Microsoft Black, friends follow this step will have the same effect):

Next, we open the software, the interface

Select the "Font" option and enter

Here you can modify the system's "default font" and "Window title font" and so on.

The results of the changes have also been seen from the above, here no longer.

How to install fonts and toggle default fonts in Ubuntu system