保存hadoop 配置文件报错如下,该怎么解决

[root@localhost conf]# source hdfs-site.xml 

-bash: hdfs-site.xml: line 1: syntax error near unexpected token `newline'

-bash: hdfs-site.xml: line 1: `<?xml version="1.0"?>'

[root@localhost conf]# 

hdfs-site.xml 文件内容如下:

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!-- Put site-specific property overrides in this file. -->

<configuration>

<property>

<name>dfs.data.dir</name>

<value>/hadoop/data</value>

</property>

</configuration>