If you want to see this in action I have a set of provisioning scripts that reprocuce the problem in an automated way...
On a brand new Debian 8.1 linode, if you run my script it will prompt you for a mysql password-- the thing is I tried to pre-set the mysql password with debconf. git clone https://github.com/bradchesney79/2015DebianJessieWebserverProject.git pushd 2015DebianJessieWebserverProject-master/ git checkout ef2dd6e396c0b88652c47c39f2cf692d562d9d23 popd mkdir -p /root/bin cp -R /root/2015DebianJessieWebserverProject-master/* /root/bin/ ./root/bin/build-script.sh The system will begin to build. <CTRL> + <Z> the password prompt to get back to the command line. I try to run the debconf command after the fact: root@server/root/# echo "mysql-server mysql-server/root_password select passw0rd" | debconf-set-selections <Output> debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable </Output> root@server/root/# fuser -v /var/cache/debconf/config.dat <Output> USER PID ACCESS COMMAND /var/cache/debconf/config.dat: root 19165 F.... frontend </Output> root@server/root/# kill 19165 Succeeds. root@server/root/# echo "mysql-server mysql-server/root_password select passw0rd" | debconf-set-selections Succeeds. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to debconf in Ubuntu. https://bugs.launchpad.net/bugs/349469 Title: debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable Status in Ambasa: New Status in Debconf: New Status in aptdaemon package in Ubuntu: Confirmed Status in debconf package in Ubuntu: Triaged Bug description: Upgrading packages that use debconf sometimes fail with the following error: debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable To manage notifications about this bug go to: https://bugs.launchpad.net/ambasa/+bug/349469/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
