![安装 postfix - apt-get 的问题](https://linux22.com/image/893245/%E5%AE%89%E8%A3%85%20postfix%20-%20apt-get%20%E7%9A%84%E9%97%AE%E9%A2%98.png)
我需要安装 postfix 以便从 ubuntu 终端发送自动邮件。我尝试使用以下命令:
sudo apt-get install postfix
但是我收到了以下错误:
WARNING: The following packages cannot be authenticated!
postfix
Install these packages without verification? [y/N] y
Err http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main postfix amd64 2.11.0-1ubuntu1 Could not resolve 'us.archive.ubuntu.com' E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/p/postfix/postfix_2.11.0-1ubuntu1_amd64.deb Could not resolve 'us.archive.ubuntu.com'
E: Unable to fetch some archives, maybe run apt-get update or try with
--fix-missing?
我也跑过:
sudo apt-get 更新
我得到了这个:
Err http://extras.ubuntu.com trusty InRelease
Err http://security.ubuntu.com trusty-security InRelease
Err http://security.ubuntu.com trusty-security Release.gpg
Could not resolve 'security.ubuntu.com'
Err http://extras.ubuntu.com trusty Release.gpg
Could not resolve 'extras.ubuntu.com'
Err http://us.archive.ubuntu.com trusty InRelease
Err http://us.archive.ubuntu.com trusty-updates InRelease
Err http://us.archive.ubuntu.com trusty-backports InRelease
Err http://us.archive.ubuntu.com trusty Release.gpg
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com trusty-updates Release.gpg
Could not resolve 'us.archive.ubuntu.com'
Err http://us.archive.ubuntu.com trusty-backports Release.gpg
Could not resolve 'us.archive.ubuntu.com'
Reading package lists... Done
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-backports/InRelease
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/InRelease
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/Release.gpg Could not resolve 'extras.ubuntu.com'
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg Could not resolve 'security.ubuntu.com'
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Could not resolve 'us.archive.ubuntu.com'
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/Release.gpg Could not resolve 'us.archive.ubuntu.com'
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-backports/Release.gpg Could not resolve 'us.archive.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.
先感谢您
PS:我的 ubuntu 版本是 14.04LTS,通过 VMware Workstation 12 Player 运行它。
答案1
看来您没有互联网连接。如果有,请尝试
ping us.archive.ubuntu.com
如果不起作用,请尝试
host -v us.archive.ubuntu.com
如果您的 DNS 连接出现任何错误,它们将显示在这里。