Have this problem too, since I updated from 15.10 to 16.04. Synaptic is not running, but the lock -file is still there:
randolf@ART-LT16:~$ ps aux | grep synaptic randolf 14314 0.0 0.0 15796 1024 pts/4 S+ 10:47 0:00 grep --color=auto synaptic randolf@ART-LT16:~$ ll /var/cache/apt/archives/lock -rw-r----- 1 root root 0 Okt 21 2015 /var/cache/apt/archives/lock Hope this helps, randolf -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1522675 Title: /root/.synaptic/ not created due to locking status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1522675/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs