Ubuntu: How to display the system tray icon (systray)

1. Problem description

Starting with Ubuntu 11, the display of the tray icon is turned off by default, and you need to manually execute commands or add additional tool configurations to whitelist.
Ubuntu 13.04 is more thorough, the default configuration does not have the tray icon at all, in addition to Java and wine, and several systems brought by the program can be displayed,
No other application can display, the previous command is not supported, such as QQ also can not be displayed.

Ubuntu 14.04 canceled the system tray whitelist mechanism, which led to the use of traditional system tray technology program can not display the tray icon, Dconf-editor is unable to solve the problem.
The technology currently used by the Ubuntu Unity Desktop is indicator-application-service.

So how do you continue to let the traditional program display the tray icon? Here is the workaround.

2. Workaround:Ubuntu 12.04 series version

(1) Execute the following command:

sudo apt-get install Libappindicator1

sudo apt-add-repository ppa:gurqn/systray-trusty

sudo apt-get update

sudo apt-get Install Unity

(2) Restart the system, or Logout/login

Reference:
Http://blog.sina.com.cn/s/blog_b394f4e70101es6u.html
Https://launchpad.net/~gurqn/+archive/ubuntu/systray-trusty
http://lightdm.lofter.com/post/459eb_6951a

3. Workaround: Ubuntu 14.04 series version

(1) Execute the following command:

sudo apt-add-repository ppa:fixnix/indicator-systemtray-unity

sudo apt-get update

sudo apt-get install indicator-systemtray-unity

(2) Restart the system, or Logout/login

Reference:
Http://askubuntu.xxi.vn/questions/612912/how-to-re-enable-the-systray-indicator-panel-after-latest-updates

Description
1, Ubuntu Default desktop is unity, the above method is to resolve the unity display method.
2, Ubuntu can install GNOME desktop, using GNOME Classic can also display icons:
sudo apt-get Install Gnome

Ubuntu: How to display the system tray icon (systray)