When We Start Pseudo Distributed Service We Face 'unregognized service' Error Message?

We may come across the below issue when we start HDFS service in cloudera:

$ for x in `cd /etc/init.d ; ls hadoop-hdfs-*` ; do sudo service $x start ; done error unrecognized service 




I was able to overcome this issue by running below commands:

• $ sudo service hadoop-hdfs-namenode start 
• $ sudo service hadoop-hdfs-datenode start 
• $ sudo service hadoop-hdfs-secondarynamenode start