这几天重新折腾了一下吃灰已久的Debian8 vps，运行一下apt-get update却出现以下错误：
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# apt-get update ... W: GPG error: http://archive.debian.org jessie Release: The following signatures were invalid: KEYEXPIRED 1587841717 |
按照百度的办法找出了过期的key：
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# apt-key list | grep expired pub 4096R/65FFB764 2012-05-08 [expired: 2019-05-07] pub 4096R/46925553 2012-04-27 [expired: 2020-04-25] |
并使用
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apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys ******** |
重新激活延期对应的key，却发现无论如何延期都还是一样的到期时间，”unchanged”……
折腾了半天无果…
结果今天终于在Google找到解决办法并成功解决了问题(u1s1，Google nb!)
参考链接：https://unix.stackexchange.com/questions/598344/debian-8-jessie-keyexpired-1587841717
解决办法也是意料之外中的简单：
编辑/etc/apt/sources.list，替换成以下即可:
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deb http://http.debian.net/debian jessie main contrib deb-src http://http.debian.net/debian jessie main contrib deb http://security.debian.org/ jessie/updates main contrib deb-src http://security.debian.org/ jessie/updates main contrib |
然后执行
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sudo apt-get update sudo apt-get upgrade |
问题就完美解决了！
