Linux Mint Forums

so I got this error again

W: Ignoring file 'opera.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
W: GPG error: http://deb.opera.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2019EA84E7532C8

I tried this "wget -O - http://deb.opera.com/archive.key | apt-key add -"
it does no fix the error

i also get this error then,
Fix broken packages first

I have tried all these and it does not want to fix the problem

sudo apt-get install -f
sudo dpkg --configure -a

There are two warnings there, not sure which you are worried about, maybe both.

Ignoring file 'opera.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

Is common for me at least and occurs because ".save" is an incorrect filename extension. I get it all the time (It also occurs with Spideroak). Both of them seem to write backup folders at some time or other and this causes the warning. I have tried deleting them but they are just recreated so I don't know what the solution is except to ignore it.

As for the second warning, try this:

Thanks for the info

I am not that worried, I just don't want the error to show anymore