$ ls -hal /usr/lib/jvm/
total 12K
drwxr-xr-x  3 root root 4.0K Dec 12 04:52 .
dr-xr-xr-x 23 root root 4.0K Dec 12 07:47 ..
lrwxrwxrwx  1 root root   26 Dec 12 04:52 java -> /etc/alternatives/java_sdk
lrwxrwxrwx  1 root root   32 Dec 12 04:52 java-1.7.0 -> /etc/alternatives/java_sdk_1.7.0
drwxr-xr-x  7 root root 4.0K Dec 12 04:52 java-1.7.0-openjdk-1.7.0.91.x86_64
lrwxrwxrwx  1 root root   34 Dec 12 04:52 java-1.7.0-openjdk.x86_64 -> java-1.7.0-openjdk-1.7.0.91.x86_64
lrwxrwxrwx  1 root root   34 Dec 12 04:52 java-openjdk -> /etc/alternatives/java_sdk_openjdk
lrwxrwxrwx  1 root root   21 Oct 29 17:24 jre -> /etc/alternatives/jre
lrwxrwxrwx  1 root root   27 Oct 29 17:24 jre-1.7.0 -> /etc/alternatives/jre_1.7.0
lrwxrwxrwx  1 root root   38 Oct 29 17:24 jre-1.7.0-openjdk.x86_64 -> java-1.7.0-openjdk-1.7.0.91.x86_64/jre
lrwxrwxrwx  1 root root   29 Oct 29 17:24 jre-openjdk -> /etc/alternatives/jre_openjdk