我今天不得不重新安装 Ubuntu,尽管已经为 Apt 配置了代理,但在尝试添加新的 PPA 时,与之通信的步骤keyserver.ubuntu.com失败了:
$ sudo add-apt-repository ppa:webupd8team/sublime-text-3
Sublime Text 3 Installer: the package in this PPA downloads and installs the latest Sublime Text 3 beta builds.
For more info, see: http://www.webupd8.org/2013/07/sublime-text-3-ubuntu-ppa-now-available.html
More info: https://launchpad.net/~webupd8team/+archive/ubuntu/sublime-text-3
Press [ENTER] to continue or ctrl-c to cancel adding it
gpg: keyring `/tmp/tmp_wo9o6sl/secring.gpg' created
gpg: keyring `/tmp/tmp_wo9o6sl/pubring.gpg' created
gpg: requesting key EEA14886 from hkp server keyserver.ubuntu.com
?: keyserver.ubuntu.com: Host not found
gpgkeys: HTTP fetch error 7: couldn't connect: Success
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
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我通过 Apt 安装包没有问题,所以据我所知,代理设置正确:
$ cat /etc/apt/apt.conf
Acquire::http::proxy "http://my-proxy:8080/";
Acquire::ftp::proxy "ftp://my-proxy:8080/";
Acquire::https::proxy "https://my-proxy:8080/";
Acquire::socks::proxy "socks://my-proxy:8080/";
$ env | grep proxy
http_proxy=http://my-proxy:8080/
ftp_proxy=ftp://my-proxy:8080/
https_proxy=http://my-proxy:8080/
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我也可以与以下人员沟通keyserver.ubuntu.com:
$ curl keyserver.ubuntu.com
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>SKS OpenPGP Public Key Server</title>
</head>
...
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我不记得过去做过什么不同的事情。我只需要配置http/s_proxy环境变量以及配置/etc/apt/apt.conf.
任何想法我在这里错过了什么?
呸!为了验证代理设置是否正确设置sudo,我进入了交互模式:
$ sudo -i
$ env | grep proxy
https_proxy=http://my-proxy:8080
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原来,只https_proxy为root设置。因为我已经设置了代理 env vars,/etc/environment这有点奇怪,sudo应该是 source /etc/environment。
然后我偶然发现了#1301557。14.04.1 是 LTS 版本,尽管早在 2014 年 4 月 2 日就已报告此错误,但仍未修复,这有点令人失望。
为了解决这个问题,http_proxy和https_proxy都应该添加到env_keepin sudoers:
Defaults env_keep +="http_proxy"
Defaults env_keep +="https_proxy"
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这解决了问题。
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