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第一种:
sudo vim /etc/resolv.conf
添加nameserver 8.8.8.8
第二种:
/etc/apt/sources.list 的内容换成deb http://old-releases.ubuntu.com/ubuntu/ raring main universe restricted multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring main universe restricted multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-security main universe restricted multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-security main universe restricted multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-updates main universe restricted multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-updates main universe restricted multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-backports main restricted universe multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-backports main restricted universe multiversedeb http://old-releases.ubuntu.com/ubuntu/ raring-proposed main restricted universe multiversedeb-src http://old-releases.ubuntu.com/ubuntu/ raring-proposed main restricted universe multiverse
然后sudo apt-get update一下
再执行 apt-get install php7.0-dev
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