JDK 环境变量配置
cat >> /etc/profile <<EOF
export JAVA_HOME=/usr/local/java
export PATH=\$JAVA_HOME/bin:\$PATH
export CLASSPATH=.:\$JAVA_HOME/lib/dt.jar:\$JAVA_HOME/lib/tools.jar
EOF
on the way
cat >> /etc/profile <<EOF
export JAVA_HOME=/usr/local/java
export PATH=\$JAVA_HOME/bin:\$PATH
export CLASSPATH=.:\$JAVA_HOME/lib/dt.jar:\$JAVA_HOME/lib/tools.jar
EOF