Security Update failed

I have version 03-01 and update the system with manual controls.

After receiving the notice about the security update I tried to install it, but it gives me a message
that the update failed and I should report that here.

I would appreciate help.

Please try and update again and let us know if you still get issues.

I still get the same error message

Post a log or try updating from the command line. See Wiki for info.

I have to leave heme now, will not be available for replies for three hours, sorry

I searched the wiki for command line updating,
reply was: no results.

can you give me a hint to the relevant wiki entry?

Thanks for the instructions. I will try to update from the command line.
How do I open the terminal (command line) in OSMC