Ubuntu – Add shut-down/logout indicator to panel

Probably you are talking about your indicators. To remove them at terminal type:

• To remove weather indicator - sudo apt-get remove my-weather-indicator.
• To remove battery status indicator - sudo apt-get remove battery-status-indicator.
• To remove evolution indicator - sudo apt-get remove evolution-indicator
• To remove message indicator - sudo apt-get remove indicator-me indicator-messages.

...Just do that to any indicator you are willing to remove from your default panel. Do not forget to add to the indicator file name hyphen plus indicator. Restart your system for your changes to take effect.

If you want them back you can as well do the reverse, by typing at the terminal the following:

To install weather indicator - sudo apt-get install weather-indicator. Do the same with other indicators you wish to install.Restart your system for your changes to take effect.

This is a list of indicators I could find for Oneiric Ocelot(Ubuntu 11.10) :What Application Indicators are available?

I hope that is what you are looking for. Thank you.

It happens to me to from time to time. I don't know the cause.

To make the missing panel indicators reappear without rebooting you can restart the indicators manually by running the following command in a terminal or with Alt+F2

restart unity-panel-service  

The panel indicators will blink off for a second, and then all of the panel indicators will restart and immediately reappear.

In Ubuntu 15.04 and later restart the panel indicators manually by running the following command:

systemctl --user restart unity-panel-service   

In Ubuntu 17.10 and later GNOME has replaced Unity as the default desktop environment. To make the missing panel indicators reappear without rebooting in Ubuntu 17.10 and later run the following command:

setsid gnome-shell --replace # Press Enter again before closing the terminal.