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I frequently receive errors as follows while running apt-get update:
[...]
gpg: keyblock resource `/etc/apt/trusted.gpg.d/pdfmod-team-ppa.gpg': resource limit
gpg: keyblock resource `/etc/apt/trusted.gpg.d/rael-gc-scudcloud.gpg': resource limit
gpg: keyblock resource `/etc/apt/trusted.gpg.d/voldyman-markmywords.gpg': resource limit
The above keys are just examples and not limited to those programs. It occurs generically with all software that I added from a PPA.
This seems to be this bug.
Someone suggested this:
The solution that worked for me was emptying
/etc/apt/trusted.gpg.d, running apt-get update, and then manually adding every key it blocked on to the main/etc/apt/trusted.gpgkeyring withapt-key advas described above.
So run these commands
sudo mv /etc/apt/trusted.gpg.d/ /etc/apt/trusted.gpg.d.backup
sudo mkdir /etc/apt/trusted.gpg.d
sudo chmod 755 /etc/apt/trusted.gpg.d
and add each key again with this:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5
OR
sudo apt-get install launchpad-getkeys
launchpad-getkeys
where you replace the hash with your needed key's hash.
launchpad-getkeys which if you do a hexdump -C on the binary you can see it is just a loop of apt-key adv ....
– Elijah Lynn
Jun 30 '18 at 3:04
One may try launchpad-getkeys.
/etc/apt/trusted.gpg.d/.$ sudo add-apt-repository ppa:nilarimogard/webupd8 repositorysudo apt-get update your local database$ sudo apt-get install launchpad-getkeys$ sudo launchpad-getkeys $ sudo apt-get update if the error is gone.
add-apt-repository -y ppa:<ppa-name>. @LewisGoddard I found another solution suggesting to use launchpad-getkeys. Should I add it below as an answer myself? – orschiro Jul 2 '15 at 6:09