Ubuntu 16.04出现：Problem executing scripts APT::Update::Post-Invoke-Success 'if /usr/bin/test -w /var/

网上查到的解决办法

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

运行该命令后即可

错误原因 未知