This page describes a few of the other options that you can perform with keytool.
To list the contents of a keystore, invoke keytool as follows (not all of the possible parameters are shown here):
keytool -list -keystore johnkeystore -alias johnkey02 -storepass johnstorepass -v
To change a keystore password, invoke keytool as follows (not all of the possible parameters are shown here):
keytool -storepasswd -keystore johnkeystore -storepass johnstorepass -new newstorepass -v
To change a key password, invoke keytool as follows (not all of the possible parameters are shown here):
keytool -keypasswd -keystore johnkeystore -storepass johnstorepass -alias johnkey02 -keypass johnstorepass -new newkeypass -v