Hi, On Wed, Jul 26, 2017 at 06:05:45AM +0700, Brianajie wrote: > Versions of packages apt suggests: > ii synaptic 0.84.2 Do you happen to have run synaptic recently, perhaps adding a repository or similar such with it? We had recently users who did and had those symptoms (guessing, as you have "helpfully" truncated the apt output – don't do this in bugreports, always show the complete output). As root (or via sudo) you should run: ls -l /etc/apt/trusted.gpg{,.d} file /etc/apt/trusted.gpg{,.d/*} My guess is that one of those files is a keybox file which apt can't deal with – and to top it of the keybox file is probably empty. Very likely the /etc/apt/trusted.gpg file which tends to not exist nowadays, so after those two commands lets directly try moving the file out of the way: mv /etc/apt/trusted.gpg{,.bak} Hopefully that helps already. If not the output of the earlier two might help us. If "apt update" still fails please add: -o Debug::Acquire::gpgv=1 and include the full output (beware, that can be a lot) in a followup. Best regards David Kalnischkies
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