Ubuntu更新apt报错解决

使用ctrl+alt+t打开终端后使用如下指令更新apt时

sudo apt-get update

出现如下错误：

 

 报错：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'

Sub-press returned an error code

参考ubantu apt 更新异常APT::Update::Post-Invoke-Success - 简书 (jianshu.com)里的代码

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

执行后报错：无法验证laubchpad.net的证书，无法本地校验颁发者的权限

 

 于是参考(8条消息) 解决wget下载https时报错 --no-check-certificate (不检查证书)_Wanderer001的博客-CSDN博客和查看wget指令帮助后，将上述代码改为

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 --no-check-certificate

下载成功，然后输入

sudo dpkg -i /tmp/appstream_0.9.4-1ubuntu1_amd64.deb /tmp/libappstream3_0.9.4-1ubuntu1_amd64.deb

完成后即可输入sudo apt-get update更新apt。