Debian的官方源以稳定为主，所以软件版本相对比较老。dotdeb.org的源更新比较快，里面的软件包都是最新稳定版本的。

vim /etc/apt/sources.list
增加下面的行：

deb http://packages.dotdeb.org stable all
deb-src http://packages.dotdeb.org stable all

deb http://php53.dotdeb.org stable all
deb-src http://php53.dotdeb.org stable all

上面有php-fpm，还有google-perftools。

dotdeb.org更新源的各地镜像：

* Austria

deb http://dotdeb.gosi.at/ stable all
deb-src http://dotdeb.gosi.at/ stable all

* Belgium

deb http://dotdeb.debian.skynet.be/ stable all
deb-src http://dotdeb.debian.skynet.be/ stable all

* Bulgaria

deb http://dotdeb.ipacct.com/packages/ stable all
deb-src http://dotdeb.ipacct.com/packages/ stable all

* Czech republic

deb http://debian-dotdeb.mirror.web4u.cz/ stable all
deb-src http://debian-dotdeb.mirror.web4u.cz/ stable all

* France

deb http://packages.dotdeb.org stable all
deb-src http://packages.dotdeb.org stable all

* Germany

deb http://ftp.hosteurope.de/mirror/packages.dotdeb.org/ stable all
deb-src http://ftp.hosteurope.de/mirror/packages.dotdeb.org/ stable all

deb http://dotdeb.netmirror.org/ stable all
deb-src http://dotdeb.netmirror.org/ stable all

* Japan

deb http://download.softagency.net/debian/dotdeb/ stable all
deb-src http://download.softagency.net/debian/dotdeb/ stable all

* Netherlands

deb http://dotdeb.mirror.cambrium.nl/ stable all
deb-src http://dotdeb.mirror.cambrium.nl/ stable all

* Romania

deb ftp://download.srv.ro/pub/dotdeb/ stable all
deb-src ftp://download.srv.ro/pub/dotdeb/ stable all

* Slovakia

deb http://mirrors.mojhosting.sk/dotdeb/ stable all
deb-src http://mirrors.mojhosting.sk/dotdeb/ stable all

* Switzerland

deb http://mirror.yux.ch/dotdeb/ stable all
deb-src http://mirror.yux.ch/dotdeb/ stable all

* United Kingdom

deb http://dotdeb.mirror.somersettechsolutions.co.uk/ stable all
deb-src http://dotdeb.mirror.somersettechsolutions.co.uk/ stable all

* USA (US/Canada/Mexico only)

deb http://dotdeb.mirror.borgnet.us/ stable all
deb-src http://dotdeb.mirror.borgnet.us/ stable all

backports更新源：http://www.ha97.com/923.html