0.更新源

加源方法：

sudo gedit /etc/apt/sources.list

更新源：

sudo apt-get update

更新软件：

sudo apt-get upgrade

阿里云源：

deb //mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiverse

deb //mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiverse

deb //mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiverse

deb //mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiverse

deb //mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse

deb-src //mirrors.aliyun.com/ubuntu/ vivid main restricted universe multiverse

deb-src //mirrors.aliyun.com/ubuntu/ vivid-security main restricted universe multiverse

deb-src //mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universe multiverse

deb-src //mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universe multiverse

deb-src //mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universe multiverse

ubuntu kylin源：

deb //archive.ubuntukylin.com:10006/ubuntukylin trusty main

注：如果提示公钥错误，可以按以下方式解决：

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6AF0E1940624A220 #此处6AF0E1940624A220需要是错误提示的key

添加PPA源（PPA：Personal Package Archives，个人软件仓库）

如果提示hash 校验和不符，有可能是网络不好引起的

#为了安装SysPeek

sudo add-apt-repository ppa:nilarimogard/webupd8

#为了安装apt-fast

sudo add-apt-repository ppa:tldm217/tahutek.net