delete a file in sources.list.d/,
and then perform the update operation, and the following error occurs
restoring the file is also useless
did not search for what the damn file is.
searched the Internet for a long time, but couldn"t find any useful information.
Urumqi 18.04
:/etc/apt$ sudo apt-get update
:1 http://dl.google.com/linux/chrome/deb stable InRelease
:2 http://dl.google.com/linux/chrome/deb stable Release
:4 http://ppa.launchpad.net/hzwhuang/ss-qt5/ubuntu xenial InRelease
:5 https://mirrors.tuna.tsinghua.edu.cn/ubuntu xenial InRelease
:6 https://mirrors.tuna.tsinghua.edu.cn/ubuntu xenial-updates InRelease
:7 https://mirrors.tuna.tsinghua.edu.cn/ubuntu xenial-backports InRelease
:8 https://mirrors.tuna.tsinghua.edu.cn/ubuntu xenial-security InRelease
...
W: unlink partialapt-get - pkgAcquire::Clean (21: )
have you ever experienced this? Or is there any solution "?