I had install new openjdk 1.8 and there is the old 1.6 version on the same version I use /usr/sbin/alternatives --config java changed the java version, and then use java -version,it shows me the openjdk version is 1.8 but I found /usr/lib/jvm/ linked to /etc/alternatives/java_sdk and still linked to /usr/lib/jvm/java-1.6.0-openjdk.x86_64 So I think nothing changed. I just set JAVA_HOME to /usr/lib/jvm/java ，and want not to change the java home path after each jdk upgrade. So I don't know why the /etc/alternatives/java_sdk link not change. ... View more