첫번째 실습자료

wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fhttp://www.oracle.com%2F; oraclelicense=accept-securebackup-cookie"

"http://download.oracle.com/otn-pub/java/jdk/8u73-b02/jdk-8u73-linux-x64.tar.gz"

update-alternatives --install "/usr/bin/java" "java" "/usr/local/java/bin/java" 1;

update-alternatives --install "/usr/bin/javac" "javac" "/usr/local/java/bin/javac" 1;

update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/local/java/bin/javaws" 1;

update-alternatives --set java /usr/local/java/bin/java;

update-alternatives --set javac /usr/local/java/bin/javac;

update-alternatives --set javaws /usr/local/java/bin/javaws;