Setting java on linux env

0. download jdk-6u20-linux-i586.bin under /ust/local and then do

1.chmod a+x jdk-6***-linux-i586.bin

2. sh ./jdk-6u20-linux-i586.bin

3. Make a link to jdk
ln -s /usr/local/jdk1.6***/ /usr/local/jdk

4. echo 'export JAVA_HOME=/usr/local/jdk'>/etc/profile.d/jdk.sh

5. echo 'export PATH=$JAVA_HOME/bin:$PATH'>>/etc/profile.d/jdk.sh

6. source /etc/profile.d/jdk.sh

7. java -version
java version "1.6.***"