Convert .p12 file to .pem using Terminal app in Mac "No such file or directory" error?

I have export the "Apple Development IOS Push Service" certificate from Keychain Access and save the "apns-dev-cert.p12" in my desktop. I want to enable `Apple Push Notification` I have followed these blogs to convert `apns-dev-cert.p12 to apns-dev-cert.pem` from Terminal app, ``` http://bhaveshkumbhani.blogspot.in/2011/12/convert-p12-to-pem-for-apns.html http://www.raywenderlich.com/3443/apple-push-notification-services-tutorial-part-12 Apple Document RemoteNotificationPG.pdf ``` I have used these commands in Terminal, ``` 1.V******-Ms-iMac-2:~ c*****$ openssl pkcs12 -in apns-dev-cert.p12 -out apns-dev-cert.pem -nodes -clcerts Response : Error opening input file apns-dev-cert.p12 Certificates.p12: No such file or directory 2.V******-Ms-iMac-2:~ c*****$ openssl pkcs12 -clcerts -nokeys -out apns-dev-cert.pem -in apns-dev-cert.p12 Response : Error opening input file apns-dev-cert.p12 Certificates.p12: No such file or directory 3.V******-Ms-iMac-2:~ c*****$ ls All_iOS_Applications_Document.doc Pictures AppStoreSubmissionSteps.doc Public Desktop Sites Documents Softwares Downloads Untitled.txt Dropbox pic Library pic.zip Movies pricelist.txt Music sms.txt Nana_User_Case_Documents.odt 4. V******-Ms-iMac-2:~ c*****$ cd 5.V******-Ms-iMac-2:~ c*****$ cd/Users/c*****/Desktop/A -bash: cd/Users/c*****/Desktop/A: No such file or directory ``` I can't understand why the terminal always saying "No such file or directory"?. Where i need to save the .p12 file in my Mac? Am using `Terminal app Version 2.1.2 (273.1). Mac OS X version 10.6.8`. Can you please what i need to do? I need to enable the APNS by using the .pem file. Please help me. Thanks in advance. EDIT: I have added tried Raywenderlich.com termial code in my mac Terminal app ``` 1. V******-Ms-iMac-2:~ c*****$ pwd /Users/creagx 2. V******-Ms-iMac-2:~ c*****$ cd/ Users/creagx/Desktop/A -bash: cd/: No such file or directory ```