1,现在jdk
wget http://download.oracle.com/otn-pub/java/jdk/7u79-b15/server-jre-7u79-linux-x64.tar.gz?AuthParam=1435138945_684050fe7e0eaec25775b102e80e290d
2,修改下载的包名
mv server-jre-7u79-linux-x64.tar.gz\?AuthParam\=1435138945_684050fe7e0eaec25775b102e80e290d server-jre-7u79-linux-x64.tar.gz
3,解压
tar -xzvf server-jre-7u79-linux-x64.tar.gz
4,设置变量
export JAVA_HOME=/home/joeyon/test/jdk
export PATH=$PATH:$JAVA_HOME/bin
5,验证是否正确安装
java -version
cd /home/cassandra/apache-cassandra-2.1.7/bin/