要使用Ubuntu前，我們一般都要先做好工具！特別是對於安裝這一塊~~~~
1、配置前，先做個配置文件的備份：
$sudo cp /etc/apt/sources.list /etc/apt/sources.list_bak
2、然后就可以添加新的源了
$sudo vim /etc/apt/sources.list
加入源地址【下面列出163的源，主要是速度與更新得快！！！推薦使用】
deb http://mirrors.163.com/ubuntu/ maverick main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ maverick-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ maverick-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ maverick-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ maverick-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ maverick main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ maverick-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ maverick-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ maverick-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/maverick-backports main restricted universe multiverse
PS：注釋掉其他行(行首加上#)，也可不操作
3、最后，更新你的軟件列表
$ sudo apt-get update – 列舉本地更新
再附幾個常用命令：
$ sudo apt-get upgrade – 安裝可用更新
$ sudo apt-get install 軟件包名 – 安裝指定軟件包
$ sudo apt-get remove 軟件包名 – 刪除指定軟件包