sudo dpkg --configure -asudo apt-get updatesudo apt-get upgrade
sudo apt-get dist-upgrade
Potom som asi vypol zdroje pre operu
W: GPG error: http://deb.opera.com stable Release: The following signatures couldn't be verified because the public key is not available: ...
wget -O - http://deb.opera.com/archive.key | sudo apt-key add -
W:Failed to fetch http://deb.opera.com/opera/dist/stable/non-free/source/Sources 404 Not Found