tar -xzvf /root/jdk-7u21-linux-i586.tar.gz
mv jdk1.7.0_21 /opt
cd /opt/jdk1.7.0_21
update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_21/bin/javac 1
update-alternatives...
Type: Posts; User: newkaliuser
tar -xzvf /root/jdk-7u21-linux-i586.tar.gz
mv jdk1.7.0_21 /opt
cd /opt/jdk1.7.0_21
update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_21/bin/javac 1
update-alternatives...