I get this red sign on top saying that I must update manually due to network problems. When I click on show updates I get the software on this computer is up to date and I click ok, but the red sign will not go away. When I restart the computer it is gone but reappears in a few minutes. How can I remove this red warning?
There are a number of alternative ways you can follow to get rid of the constantly appearing Ubuntu update sign.
Force all updates to install:
sudo apt-get dist-upgrade
Notice that this may cause some packages to be uninstalled, due to conflicts. So check what changes will be made to your system. You will be prompted to do this upgrade. Also, when new updates arrive, you will be notified again. This is default method.
Install Unattended upgrades:
sudo apt-get install unattended-upgrades sudo dpkg-reconfigure unattended-upgrades
Say "Yes" in dialog window. For me, it is a best method.
The next 2 methods I do not recommend and put them only for comparison:
Disable Update notifications:
Open Startup Applications:
Disable Updates notifier there
Your application lists will still be updated, but you won't be notified.
Disable Updates checking totally
To stop the pop-up run
Then in settings, set Update automatically to 'Never' and Notify of new version to 'Never'