I need to use keytool and I want to use possible newest version. I have on my Ubuntu oracle jdk, and OpenJDK.

~$ java -version

java version "1.7.0_25"

Java(TM) SE Runtime Environment (build 1.7.0_25-b15)

Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)

keytool command is located in two places:

~$ type -a keytool

keytool is /usr/bin/keytool

keytool is /usr/local/java/jdk1.7.0_25/bin/keytool

~$ file /usr/bin/keytool

/usr/bin/keytool: symbolic link to /etc/alternatives/keytool

~$ file /etc/alternatives/keytool

/etc/alternatives/keytool: symbolic link to /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/keytool

How do I know if I use /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/keytool or /usr/local/java/jdk1.7.0_25/bin/keytool ?