Using Linux Mint 20 Cinnamon

 

I have been unable to get the upgrades installed. After entering my password, the Error Message below appears.

I do not understand what it means, I have opened a Terminal and entered "dpkg --configure -a"

but the machine returns "command not recognised",

How do I proceed?

E: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem.
E: _cache->open() failed, please report.

Did you use sudo?

 

sudo dpkg --configure -a

 

After that,  run sudo apt update

 

Is this a new installation?

That worked , many thanks!