运行时update-mime-database- 通常由自动启动apt-get- 为什么我会可靠地收到如下投诉：
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
Unknown media type in type 'uri/mms'
Unknown media type in type 'uri/mmst'
Unknown media type in type 'uri/mmsu'
Unknown media type in type 'uri/pnm'
Unknown media type in type 'uri/rtspt'
Unknown media type in type 'uri/rtspu'
Unknown media type in type 'fonts/package'
Unknown media type in type 'interface/x-winamp-skin'
它似乎没有伤害任何东西，但是更新期间的长期错误可能会掩盖我确实关心的错误。
我在 Kubuntu 14.04 中重新安装了 Amarok 播放器，因为它看起来有问题。我在终端中注意到了这一点：
david@EMACHINE:~$ sudo apt-get install --reinstall amarok
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 5,715 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://mirror.lstn.net/ubuntu/ trusty/universe amarok i386 2:2.8.0-0ubuntu3 [5,715 kB]
Fetched 5,715 kB in 2s (2,611 kB/s)
(Reading database ... 128504 files and directories currently installed.) …