พิมพ์ตามนี้แหละ
root@lluu:~# ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2010-01-10 00:15 /usr/bin/java -> /etc/alternatives/java
root@lluu:~# ls -l /etc/alternatives/java
lrwxrwxrwx 1 root root 36 2010-01-10 00:15 /etc/alternatives/java -> /usr/lib/jvm/java-6-sun/jre/bin/java