Generate .pem file Used to setup Apple PUSH Notification


$ openssl x509 -in aps_development.cer -inform der -out APNS_Development.pem
$ openssl pkcs12 -nocerts -out APNSKeys_Developement.pem -in APNSCertificates.p12
$ cat APNS_Development.pem APNSKeys_Developement.pem > APNS_Development_Cert_N_Key.pem

Above command is used for generate .pem file for push notification.