JAVA JRE 1.7.0_21 installation on CentOS-55

# cd /usr/java

# mv jre-7u21-linux-i586.tar.gz .

# tar xzvf jre-7u21-linux-i586.tar.gz (path: /usr/java/jre1.7.0_21)

# cd /usr/local/bin

# mv java java_old (or remove previous JRE version)

# ln -s /usr/java/jre1.7.0_21/bin/java

# cd /usr/bin

# ln -s /usr/java/jre1.7.0_21/bin/java

FINISH