手动卸载Ambari后，如果安装新程序时报以下错误：
E: Malformed entry 1 in list file /etc/apt/sources.list.d/ambari-hdp-51.list (URI parse)
E: The list of sources could not be read.
* 其中的51也可能是其它数值。
解决方法：
rm /etc/apt/sources.list.d/ambari-hdp-51.list
E: Malformed entry 1 in list file /etc/apt/sources.list.d/ambari-hdp-51.list (URI parse)E: The list of sources could not be read.