执行sudo apt-get upgrade时，总是跳出以下错误提示：
Errors were encountered while processing:
blueman
E: Sub-process /usr/bin/dpkg returned an error code (1)看了大佬的文章后找到了解决办法：
通过执行下面的命令可以解决该问题：
$ sudo mv /var/lib/dpkg/info/ /var/lib/dpkg/info_old/
$ sudo mkdir /var/lib/dpkg/info/
$ sudo apt-get update
...
$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
7 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up bluez (4.101-0ubuntu13.1) ...
Setting up blueman (1.23-git201403102151-1ubuntu1) ...
Setting up bluetooth (4.101-0ubuntu13.1) ...
Setting up bluez-alsa:amd64 (4.101-0ubuntu13.1) ...
Setting up bluez-alsa:i386 (4.101-0ubuntu13.1) ...
Setting up bluez-gstreamer (4.101-0ubuntu13.1) ...
Setting up bluez-utils (4.101-0ubuntu13.1) ...
$ sudo mv /var/lib/dpkg/info/* /var/lib/dpkg/info_old/
$ sudo rm -rf /var/lib/dpkg/info
$ sudo mv /var/lib/dpkg/info_old/ /var/lib/dpkg/info/输入上述命令之后，在执行 sudo apt-get update 和 sudo apt-get upgrade 就不会有问题了。