I'm trying to upgrade packages, every time I ran sudo apt-get upgrade process freezes at setting up dnscrypt-proxy:
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for mime-support (3.54ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
ureadahead will be reprofiled on next reboot
Setting up dnscrypt-proxy (1.4.0-0~oldconf2+trusty1) ...
Then I have to kill apt-get , rm /var/lib/dpkg/lock.
I also tried removing package.