class does not exist: Mapreduce program in terminal

class does not exist: Mapreduce program in terminal

I am a mapreduce program beginner. I am trying to run a mapreduce program
via. ubuntu terminal. while running the program i met with this error.
/home/hduser/myprograms/tables/SmsDriver.java:4: error: package
org.apache.hadoop.conf does not exist import
org.apache.hadoop.conf.Configured;
please help me..