BackBox是基于Ubuntu的Linux发行版，因此，我们可以使用Ubuntu的更新源作为BackBox的更新源。
1.查看系统版本信息：
输入：
uname -a
显示计算机及操作系统的有关信息，在回显里我们可以看到：
Linux master 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10 16:30:51 UTC 2017 i686 i686 i686 GNU/Linux
这表明我们现在使用的Linux内核是Ubuntu
另外我们还可以通过输入命令：
cat /proc/version
查看内核版本，运行回显如下：
Linux version 4.10.0-38-generic (buildd@lgw01-amd64-020) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) ) #42~16.04.1-Ubuntu SMP Tue Oct 10 16:30:51 UTC 2017
输入：
cat /etc/issue
可以查看当前使用的发行版的信息，回显如下：
BackBox Linux 5 \n \l
因此，本文的操作环境为：
BackBox 5（基于Ubuntu16.04.1）
当然，在添加更新源时对版本的要求也不是这么绝对，一般情况下，只要更新源本身还在更新并能通过互联网访问，那么更新源就是可以使用的。
2.BackBox 5自带的更新源
BackBox 5自带的更新源均指向Ubuntu的官网地址，自带的更新源如下：
#deb cdrom:[BackBox Linux 5 - Release i386]/ xenial main multiverse restricted universe # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted ## Major bug fix updates produced after the final release of the ## distribution. deb http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-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/ xenial universe # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial universe deb http://cn.archive.ubuntu.com/ubuntu/ xenial-updates universe # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-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/ xenial multiverse # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial multiverse deb http://cn.archive.ubuntu.com/ubuntu/ xenial-updates multiverse # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-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/ xenial-backports main restricted universe multiverse # deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe 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 xenial partner # deb-src http://archive.canonical.com/ubuntu xenial partner deb http://security.ubuntu.com/ubuntu xenial-security main restricted # deb-src http://security.ubuntu.com/ubuntu xenial-security main restricted deb http://security.ubuntu.com/ubuntu xenial-security universe # deb-src http://security.ubuntu.com/ubuntu xenial-security universe deb http://security.ubuntu.com/ubuntu xenial-security multiverse # deb-src http://security.ubuntu.com/ubuntu xenial-security multiverse
3.补充BackBox国内更新源：
输入：
sudo leafpad /etc/apt/sources.list
使用leadpad打开更新源配置文件。
也可以输入：
sudo vi /etc/apt/sources.list
使用vi编辑器打开更新源配置文件
注：不要忘记加上sudo
将以下更新源复制到原更新源的前面保存即可：
#阿里云源 # deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted deb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-properties deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties deb http://mirrors.aliyun.com/ubuntu/ xenial universe deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties deb http://archive.canonical.com/ubuntu xenial partner deb-src http://archive.canonical.com/ubuntu xenial partner deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse #网易源 deb http://mirrors.163.com/ubuntu/ precise main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ precise-security main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ precise-updates main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe multiverse deb http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ precise main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ precise-security main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ precise-updates main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse #中科大源： deb http://debian.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universe deb http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ trusty main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-backports main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-proposed main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-security main multiverse restricted universe deb-src http://debian.ustc.edu.cn/ubuntu/ trusty-updates main multiverse restricted universe #东北大学源 deb-src http://mirror.neu.edu.cn/ubuntu/ xenial main restricted #Added by software-properties deb http://mirror.neu.edu.cn/ubuntu/ xenial main restricted deb-src http://mirror.neu.edu.cn/ubuntu/ xenial restricted multiverse universe #Added by software-properties deb http://mirror.neu.edu.cn/ubuntu/ xenial-updates main restricted deb-src http://mirror.neu.edu.cn/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties deb http://mirror.neu.edu.cn/ubuntu/ xenial universe deb http://mirror.neu.edu.cn/ubuntu/ xenial-updates universe deb http://mirror.neu.edu.cn/ubuntu/ xenial multiverse deb http://mirror.neu.edu.cn/ubuntu/ xenial-updates multiverse deb http://mirror.neu.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse deb-src http://mirror.neu.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties deb http://archive.canonical.com/ubuntu xenial partner deb-src http://archive.canonical.com/ubuntu xenial partner deb http://mirror.neu.edu.cn/ubuntu/ xenial-security main restricted deb-src http://mirror.neu.edu.cn/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties deb http://mirror.neu.edu.cn/ubuntu/ xenial-security universe deb http://mirror.neu.edu.cn/ubuntu/ xenial-security multiverse #清华大学源 # deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricted deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial main restricted deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates main restricted deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial universe deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates universe deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial multiverse deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-updates multiverse deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-backports main restricted universe multiverse deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security main restricted deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security universe deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ xenial-security multiverse
注：更改更新源之前最好先对原有的更新源做一个备份，备份命令：
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup