Ubuntu16.04 appstreamcli错误

解决方案：https://askubuntu.com/questions/774986/appstreamcli-hanging-with-100-cpu-usage-during-update

搬运过来是：

This is caused by a bug https://bugs.launchpad.net/ubuntu/+source/appstream/+bug/1579712
The working solution (just tried myself):

First kill appstreamcli, either manually or with

sudo kill -KILL $(pgrep appstreamcli)

or

sudo pkill -KILL appstreamcli

Then:

wget -P /tmp https://launchpad.net/ubuntu/+archive/primary/+files/appstream_0.9.4-1ubuntu1_amd64.deb https://launchpad.net/ubuntu/+archive/primary/+files/libappstream3_0.9.4-1ubuntu1_amd64.deb
sudo dpkg -i /tmp/appstream_0.9.4-1ubuntu1_amd64.deb /tmp/libappstream3_0.9.4-1ubuntu1_amd64.deb

After this you will be able to proceed with apt-get update as usual

原文地址：https://www.cnblogs.com/gaoze/p/8259100.html