Hit:7 http://in.archive.ubuntu.com/ubuntu xenial InRelease Hit:8 http://in.archive.ubuntu.com/ubuntu xenial-updates InRelease Reading package lists... Done N: Skipping acquire of configured file 'nginx/binary-i386/Packages' as repository 'http://nginx.org/packages/ubuntu bionic InRelease' doesn't support architecture 'i386'
This is not a message I would worry about. I get the same thing on my Google Earth entry:
deb http://dl.google.com/linux/earth/deb/ stable main
Now, I can edit this line to say this, which gets rid of the error:
deb [ arch=amd64 ] http://dl.google.com/linux/earth/deb/ stable main
The problem is that every time Google Earth updates, it overwrites my changes. If you make the change to your nginx repo, it could do the same thing.