yum與apt-get的區別以及兩者更新源（阿里/網易【163】）
一般來說著名的linux系統基本上分兩大類：
1.RedHat系列：Redhat、Centos、Fedora等
2.Debian系列：Debian、Ubuntu等
RedHat 系列
1 常見的安裝包格式 rpm包,安裝rpm包的命令是“rpm -引數”
2 包管理工具 yum
3 支援tar包
Debian系列
1 常見的安裝包格式 deb包,安裝deb包的命令是“dpkg -引數”
2 包管理工具 apt-get
3 支援tar包
apt-get更新源
在使用apt-get update的時候，出現如下錯誤時：
E: Some index files failed to download, they havebeen ignored, or old ones used instead.
可以將目錄下/var/lib/apt/lists/partial/所有的檔案清掉，再次執行apt-get update即可！
1、複製原檔案備份
sudo cp /etc/apt/source.list/etc/apt/source.list.bak
2、編輯源列表檔案
sudo vim /etc/apt/source.list
3、將原來的列表刪除，新增如下內容
阿里
deb http://mirrors.aliyun.com/ubuntu/ vivid mainrestricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-security main restricted universemultiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricted universemultiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricted universemultiverse
deb http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricted universemultiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid main restricted universemultiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-security main restricteduniverse multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-updates main restricteduniverse multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-proposed main restricteduniverse multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ vivid-backports main restricteduniverse multiverse
網易
deb
http://mirrors.163.com/ubuntu/lucid main universe restricted multiverse
deb-src http://mirrors.163.com/ubuntu/lucid main universe restricted multiverse
deb http://mirrors.163.com/ubuntu/lucid-security universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/lucid-security universe main multiverse restricted
deb
deb http://mirrors.163.com/ubuntu/lucid-proposed universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/lucid-proposed universe main multiverse restricted
deb http://mirrors.163.com/ubuntu/lucid-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/lucid-backports universe main multiverse restricted
deb-src http://mirrors.163.com/ubuntu/lucid-updates universe main multiverse restricted
4、執行sudo apt-get update
5、執行sudo apt-get upgrade
yum更新源
1、複製原檔案備份
mv /etc/yum.repos.d/CentOS-Base.repo/etc/yum.repos.d/CentOS-Base.repo.backup
2、下載新的CentOS-Base.repo 到/etc/yum.repos.d/
CentOS 5
CentOS 6
CentOS 7
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
3、之後執行yum makecache生成快取