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在文章的开头，首先要声明，各个版本的Ubuntu的更新源是不同的，请大家使用自己相对应的源进行更新，不然会发生很多依赖问题！出现这个问题，一般都是因为自己更改了错误的源，诸如版本不对，自己是12.04版本的源改成了12.10 13.04的源，导致在使用apt-get的时候报依赖错误，以下是针对12.04 版本的源
昨天在装edb，发现总是报错误，具体错误的信息不大记得，但是 Depends: g++-4.6(>= 4.6.3-1)but it is not going 这种类型的错误，搜索了网上的解决方案，有这么两种解决方案（这边已安装g++为例说明）：
方案一：apt-get -finstall把欠缺的包安装完毕。再次重试：apt-getinstall g++ （我是没成功。。。）
方案二：降低安装包 参考 http://blog.csdn.net/delphinew/article/details/5871425
第二种方案可行性比较小，因为你会发现要自己手动更新 N 多的包！！！ 一个接一个，摇摇无期，最后我是放弃了。。。（最后还好没有这么做，要更新的包的数量用系统自动更新也长达了十来分钟。。。）
我的解决方案是：我们从更新源来入手解决！建议使用系统最初给我们的源（本人最初使用的是科大的源）
步骤一： sudo gedit /etc/apt/sources.list
步骤二：将下面的代码覆盖 /etc/apt/sources.list 的内容（我使用的是12.10，版本无影响，放心使用）
#deb cdrom:[Ubuntu 12.10 _Quantal Quetzal_ - Release i386 (20121017.2)]/ quantal main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://cn.archive.ubuntu.com/ubuntu/ quantal main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://cn.archive.ubuntu.com/ubuntu/ quantal-updates main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also,please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://cn.archive.ubuntu.com/ubuntu/ quantal universe
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal universe
deb http://cn.archive.ubuntu.com/ubuntu/ quantal-updates universe
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team,and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also,please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://cn.archive.ubuntu.com/ubuntu/ quantal multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ quantal-updates multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release,although it includes
## newer versions of some applications which may provide useful features.
## Also,please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://cn.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu quantal-security main restricted
deb-src http://security.ubuntu.com/ubuntu quantal-security main restricted
deb http://security.ubuntu.com/ubuntu quantal-security universe
deb-src http://security.ubuntu.com/ubuntu quantal-security universe
deb http://security.ubuntu.com/ubuntu quantal-security multiverse
deb-src http://security.ubuntu.com/ubuntu quantal-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu,but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu quantal partner
# deb-src http://archive.canonical.com/ubuntu quantal partner
## This software is not part of Ubuntu,but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu quantal main
deb-src http://extras.ubuntu.com/ubuntu quantal main
步骤三： 保存 上面文件后，在终端输入
sudoapt-get update && sudo apt-get upgrade 更新下，时间会比较久！
分析：在更新的代码段中，我看到了那些包包的替换，很多很多。。。当然中间也有g++的替换
然后在安装g++ 就没有问题了 （编辑：李大同）
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