keytool commands

Import intermediate and root certs into an existing .p12 file 

keytool -import -trustcacerts -alias intermediate -file ./intermediate.cer -keystore myfile.p12 -storetype pkcs12 -storepass  ****

keytool -import -trustcacerts -alias root -file ./root.cer -keystore myfile.p12 -storetype pkcs12 -storepass ****

List the certificate in a keystore file

keytool -list -keystore myfile.p12  -storepass  ****-storetype pkcs12 -v