特殊:Badtitle/NS100:AptProxy/zh

翻译人员:

李威

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简述 

apt-proxy程序将你从网络上下载下来的软件包缓存到本地磁盘。apt-proxy的行为就像一台包含那些你所选择软件包全部拷贝的HTTP服务器。你可以从本地网络上的其他计算机上存取这些软件包。如果软件包还没有被缓存，apt-poxy会自动下载并缓存上。这对那些需要重复安装同样软件包的人来说（如，为多台机子升级），非常有效的节约了下载带宽和安装的时间。

安装 

apt-proxy 已经包含在通用档案文件中。要安装，在终端中运行命令：

sudo apt-get install apt-proxy

配置apt-proxy服务器

默认设置

The first section of the apt-proxy configuration file, located at /etc/apt-proxy/apt-proxy-v2.conf, contains the default settings for the apt-proxy and its cache. The first step is to check the address parameter to the IP of your apt-proxy server in the internal network. If it is commented out, apt-proxy will listen on all the IP addresses of your server. The port parameter specifies the port apt-proxy listens on for requests and defaults to 9999, which is generally a good value to use. If you wish to change the directory that apt-proxy stores its cached packages, change the cache_dir parameter. The cache directory defaults to /var/cache/apt-proxy. If you are using a web proxy server (such as Squid), you can configure apt-proxy to be aware of it with http_proxy = proxy_server:port. If you are behind a firewall you may experience problems with active FTP connections when trying to connect to a FTP backend. passive_ftp = on should solve this problem. The other values control the time a package remains in the cache, how old a package must be at least before apt-proxy checks for newer versions or how often the cache is checked for old packages. They can safely be left on their default values.

Backends

apt-proxy has to know where to find remote repositories, which it refers to as backends. This is done via backend sections in /etc/apt-
proxy/apt-proxy-v2.conf. A backend entry for Ubuntu may look like this:

[ubuntu]
;; Ubuntu archive
backends =
http://archive.ubuntu.com/ubuntu
http://de.archive.ubuntu.com/ubuntu

As you can see, it is possible to specify more than one server, separated by blank space. If the first server is down, apt-proxy tries to get the data from the second server and so on. Note: If the first server is up, but does not have a required file, apt-proxy will not fall back to a second server. You can also override values set in the [default-section. For instance, if you know that a special server takes very long to answer a request, you can increase the timeout value:

[ubuntu-slow]
timeout = 60 ;wait 1 Minute
backends = prot://some.very.slow.server.net/ubuntu-slow

A complete example apt-proxy-v2.confmay look like this:

[DEFAULT]
;; All times are in seconds, but you can add a suffix
;; for minutes(m), hours(h) or days(d)

address = 127.0.0.1
port = 9999
cache_dir = /var/cache/apt-proxy

;; Control files (Packages/Sources/Contents) refresh rate
min_refresh_delay = 1s
complete_clientless_downloads = 1

;; Debugging settings.
debug = all:4 db:0

timeout = 30
passive_ftp = on

;;--------------------------------------------------------------
;; Cache housekeeping

cleanup_freq = 1d
max_age = 120d
max_versions = 3

;;---------------------------------------------------------------
;; Backend servers
;;
;; Place each server in its own [section]

[ubuntu]
; Ubuntu archive
backends =
http://archive.ubuntu.com/ubuntu
http://de.archive.ubuntu.com/ubuntu

[ubuntu-security]
; Ubuntu security updates
backends = http://security.ubuntu.com/ubuntu

[marillat]
backends = http://mirrors.ecology.uni-kiel.de/debian/debian-multimedia

[debian]
; Backend servers, in order of preference
backends =
http://ftp.us.debian.org/debian
http://ftp.de.debian.org/debian
http://ftp2.de.debian.org/debian
ftp://ftp.uk.debian.org/debian

[debian-non-US]
; Debian debian-non-US archive
backends =
http://ftp.uk.debian.org/debian-non-US
http://ftp.de.debian.org/debian-non-US
ftp://ftp.uk.debian.org/debian

[security]
; Debian security archive
backends =
http://security.debian.org/debian-security
http://ftp2.de.debian.org/debian-security

[openoffice]
; OpenOffice.org packages
backends =
http://ftp.freenet.de/pub/debian-openoffice
http://ftp.sh.cvut.cz/MIRRORS/OpenOffice.deb
http://borft.student.utwente.nl/debian

[apt-proxy]
; Apt-proxy new versions
backends = http://apt-proxy.sourceforge.net/apt-proxy

Note that you don't specify versions of distributions in this file; by enabling Ubuntu, you gain the ability to proxy for all versions (Hoary, Breezy, Dapper etc). What is downloaded depends on what is configured in the sources.list file on each client.