Ubuntu apt-get update失败

新安装的ubnutu1404 64位，想装vim 时需要更新软件源，但是在apt-get update出错，错误显示 -

Reading package list Error

Could not get lock /var/apt/lists/lock - open (这里面写的啥忘了)

解决方案1 （亲测通过）：打开softwarecenter 在edit-> softwaresources里选择最合适你计算机的软件源，然后选定。

                                        接着打开终端，输入apt-get update

                                         过一会儿，就好了。

解决方案2 （同事的ubuntu1410测试通过）：将/var/lib/apt/lists中的文件全部删除

                                                                      rm  /var/cache/apt/archives/lock

                                                                      rm /var/lib/dpkg/lock

                                                                     apt-get -f install 修复依赖

                                                                     apt-get update