Some useful Java Keytool commands
Below are some commands you might find useful in determining Keystore issues.
Deleting a certificate
sudo keytool -delete -keystore /usr/lib/jvm/java-6-sun-1.6.0.06/jre/lib/security/jssecacerts
-alias aliasname
List all of the keystore certificates
keytool -list -v -keystore keystorelocation | more
List all cacerts certificates
keytool -list -keystore /etc/java-6-sun/security/cacerts | more
List or display a certificate
keytool -printcert -v -file anycert.cer | more
Hope they come in handy
-Matt