Unable to get example JAR applications in my VM

Sir, I at hadoop admin video

When I run the below command, I am getting the output on my VM
[root@hdpdn1 ~]# find / -name “hadoopexamples.jar”

But I am NOT getting any jar’s under “/usr/lib/hadoop-0.20-mapreduce/hadoop-examples.jar” to test a wordcount program
[root@hdpdn1 ~]# hadoop jar /usr/lib/hadoop-0.20-mapreduce/hadoop-examples.jar
Not a valid JAR: /root//usr/lib/hadoop-0.20-mapreduce/hadoop-examples.jar

I am unable to find jars for sample applications here like wordcount etc.

Kindly help…

What is the command you were used to execute mapred job