hadoop配置之后，使其生效提示错误

 source /bin/profile时提示错误信息：

-bash: /usr/java/jdk1.8.0_181/bin:/usr/java/jdk1.8.0_181/jre/bin:/opt/hadoop-1.2.1/bin: No such file or directory
然后其他所有命令都提示:command not found...