ubuntu 更新时出现问题：
下面展示一些 内联代码片。

Problem executing scripts APT::Update::Post-Invoke-Success ‘if /usr/bin/test -w /var/cache/app-info -a -e /usr/bin/appstreamcli; then appstreamcli refresh > /dev/null; fi’  

E: Sub-process returned an error code 

此时可以利用以下解决方法：

sudo pkill -KILL appstreamcli  

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   

再更新

sduo apt-get update 

转载自：https://blog.csdn.net/zichen7055/article/details/80605931