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一般出现这个报错,大多数时候是因为DNS有问题:

长期解决办法:

(1)下载并启动resolvconf

sudo apt-get install resolvconf

sudo systemctl start resolvconf.service

sudo systemctl enable resolvconf.service

(2)打开DNS服务器地址配置文件并添加常用DNS地址

sudo vi /etc/resolvconf/resolv.conf.d/head

#在其中写入常用的DNS服务器,这里使用国内公共114和阿里云
	nameserver 114.114.114.114
	nameserver 114.114.114.115

(3)保存并生效

sudo resolvconf --enable-updates

sudo resolvconf -u

(4) 更新配置

sudo resolvconf -u

(5)删除以下

rm -rf /etc/resolv.conf

(6)重新创建软连接

sudo ln -s /run/resolvconf/resolv.conf /etc/resolv.conf

至此 再apt update试试

本文标签: 解决方案UbantuTemporaryresolvingfailure