ARM架构上lubuntu更换源地址

 文件/etc/apt/sources.list是一个普通可编辑的文本文件，保存了ubuntu软件更新的源服务器的地址。和sources.list功能一样的是/etc/apt/sources.list.d/*.list(*代表一个文件名，只能由字母、数字、下划线、英文句号组成)。sources.list.d目录下的*.list文件为在单独文件中写入源的地址提供了一种方式，通常用来安装第三方的软件。

 

deb http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-proposed main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

如上是ubuntu官方sources.list文件内容，具体地含义如下：

 

每一行的开头是deb或者deb-src，分别表示直接通过.deb文件进行安装和通过源文件的方式进行安装。

 

deb或者deb-src字段之后，是一段URL，之后是五个用空格隔开的字符串，分别对应相应的目录结构。在浏览器中输入http://archive.ubuntu.com/ubuntu/，并进入dists目录，可以发现有5个目录和前述sources.list文件中的第三列字段相对应。任选其中一个目录进入，可以看到和sources.list后四列相对应的目录结构。

 

 

遇到 sudo apt-get update出现  错误，说明源不可用了，那么就换一下源就可以了。

 

 

更换方法:

            sudo cp /etc/apt/sources.list  /etc/apt/sources.list.backup  //备份源

            sudo gedit /etc/apt/sources.list    //打开删除其中的内容，加入下面的内容

            #163源

          deb http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse

          deb http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse

          deb http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse

          deb http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse

          deb http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

          deb-src http://mirrors.163.com/ubuntu/ trusty main restricted universe multiverse

          deb-src http://mirrors.163.com/ubuntu/ trusty-security main restricted universe multiverse

          deb-src http://mirrors.163.com/ubuntu/ trusty-updates main restricted universe multiverse

          deb-src http://mirrors.163.com/ubuntu/ trusty-proposed main restricted universe multiverse

          deb-src http://mirrors.163.com/ubuntu/ trusty-backports main restricted universe multiverse

          #sohu源　      

         deb http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiverse

         deb http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiverse

         deb http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiverse

         deb http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiverse

         deb http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse

         deb-src http://mirrors.sohu.com/ubuntu/ trusty main restricted universe multiverse

         deb-src http://mirrors.sohu.com/ubuntu/ trusty-security main restricted universe multiverse

         deb-src http://mirrors.sohu.com/ubuntu/ trusty-updates main restricted universe multiverse

         deb-src http://mirrors.sohu.com/ubuntu/ trusty-proposed main restricted universe multiverse

         deb-src http://mirrors.sohu.com/ubuntu/ trusty-backports main restricted universe multiverse

         #os-china源    

        deb http://mirrors.oschina.net/ubuntu/ trusty main restricted universe multiverse

        deb http://mirrors.oschina.net/ubuntu/ trusty-backports main restricted universe multiverse

        deb http://mirrors.oschina.net/ubuntu/ trusty-proposed main restricted universe multiverse

        deb http://mirrors.oschina.net/ubuntu/ trusty-security main restricted universe multiverse

        deb http://mirrors.oschina.net/ubuntu/ trusty-updates main restricted universe multiverse

        deb-src http://mirrors.oschina.net/ubuntu/ trusty main restricted universe multiverse

        deb-src http://mirrors.oschina.net/ubuntu/ trusty-backports main restricted universe multiverse

        deb-src http://mirrors.oschina.net/ubuntu/ trusty-proposed main restricted universe multiverse

        deb-src http://mirrors.oschina.net/ubuntu/ trusty-security main restricted universe multiverse

        deb-src http://mirrors.oschina.net/ubuntu/ trusty-updates main restricted universe multiverse

       保存之后，用下面的命令使源生效:

        sudo apt-get update