在 Debian Jessie 上從 backports 安裝 Certbot

在嘗試在 Debian Jessie 上安裝 Certbot 時，我需要根據certbot 安裝說明進行反向移植。它失敗了。然後我嘗試將反向引用添加到 Debian sources.list文件中。它也失敗了。那麼如何在 Jessie 上安裝 Certbot 呢？我也想知道如何添加反向埠。

這是我的嘗試：

root@deployer:~# apt-get install certbot
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package certbot
root@deployer:~# apt-get install certbot
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package certbot
root@deployer:~# 
root@deployer:~# cat /etc/*-release|grep VER
VERSION_ID="8"
VERSION="8 (jessie)"
root@deployer:~# echo deb http://ftp.debian.org/debian/dists/jessie-backports/ jessie-backports main > /etc/apt/sources.list
root@deployer:~# cat /etc/apt/sources.list
deb http://ftp.debian.org/debian/dists/jessie-backports/ jessie-backports main
root@deployer:~# apt-get update
Ign http://ftp.debian.org jessie-backports InRelease
Ign http://ftp.debian.org jessie-backports Release.gpg
Ign http://ftp.debian.org jessie-backports Release
Err http://ftp.debian.org jessie-backports/main amd64 Packages
 404  Not Found [IP: 130.89.148.12 80]
Ign http://ftp.debian.org jessie-backports/main Translation-en_US
Ign http://ftp.debian.org jessie-backports/main Translation-en
W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-backports/dists/jessie-backports/main/binary-amd64/Packages  404  Not Found [IP: 130.89.148.12 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.
root@deployer:~# apt-get install certbot
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package certbot
root@deployer:~# 

要將 backports 添加到您的 sources.list 中，您必須編輯您的/etc/apt/sources.list文件並添加以下行：

deb http://ftp.debian.org/debian jessie-backports main

一旦你編輯了你的 source.list 文件，你必須在安裝你的包之前執行 apt-get update 。所以執行：

apt-get update

現在你可以安裝你的包了：

apt-get -t jessie-backports install "package"

deb http://ftp.debian.org/debian jessie-backports main

而不是

http://ftp.debian.org/debian/ **dists/jessie-backports/** jessie-backports main

下次使用複制+粘貼！

引用自：https://unix.stackexchange.com/questions/468277