将 Ubuntu 从 14.04 升级到 16.04 后，我遇到了以下两个问题。1
. 当我执行 sudo apt-get update 时，我得到了：
W: <http://us.archive.ubuntu.com/ubuntu/dists/precise-security/InRelease>: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)
W: <us.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease>: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)
W: <us.archive.ubuntu.com/ubuntu/dists/precise-backports/InRelease>: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)
W: <archive.canonical.com/ubuntu/dists/precise/Release.gpg>: Signature by key 630239CC130E1A7FD81A27B140976EAF437D05B5 uses weak digest algorithm (SHA1)
2. 没有wifi连接。
我非常感谢任何建议。
提前感谢并致以最诚挚的问候
答案1
您不必担心该消息。这只是一个警告。SHA1 哈希算法已被弃用。以下链接有更多相关信息。
https://konklone.com/post/why-google-is-hurrying-the-web-to-kill-sha-1