nadia is for LinuxMint only. Change to quantal.

E.g.:

deb http://archive.canonical.com/ubuntu/ nadia partner
# to
deb http://archive.canonical.com/ubuntu/ quantal partner

Keep nadia for:

deb http://packages.linuxmint.com

Then

sudo apt-get update

Files:

ls -la /etc/apt/sources.list.d/*

Check:

inix -r

nadia is for LinuxMint only. Change to quantal.

E.g.:

deb http://archive.canonical.com/ubuntu/ nadia partner
# to
deb http://archive.canonical.com/ubuntu/ quantal partner

Keep nadia for:

deb http://packages.linuxmint.com

Then

sudo apt-get update

Files:

ls -la /etc/apt/sources.list.d/*

Check:

inxi -r

nadia is for LinuxMint only. Change to quantal.

E.g.:

deb http://archive.canonical.com/ubuntu/ nadia partner
# to
deb http://archive.canonical.com/ubuntu/ quantal partner

Keep nadia for:

deb http://packages.linuxmint.com

Then

sudo apt-get update

nadia is for LinuxMint only. Change to quantal.

E.g.:

deb http://archive.canonical.com/ubuntu/ nadia partner
# to
deb http://archive.canonical.com/ubuntu/ quantal partner

Keep nadia for:

deb http://packages.linuxmint.com

Then

sudo apt-get update

Files:

ls -la /etc/apt/sources.list.d/*

Check:

inix -r