my configurations are
hduser@worker1:/usr/local/hadoop/conf$ jps The program \'jps\' can be found in the following packages: * openjdk-6-jdk * openjdk-7-jd
Open syneptics package manager and install openjdk-7-jdk and openjdk-6-jdk package. AFter that jps will work
openjdk-7-jdk
openjdk-6-jdk