I have followed the steps for the installation from www.instalrails.com . After installing Xcode they say to check the Preferences -> Location and have ensure you have the command line tools - Xcode 5.0.2 ( 5A3005 ) http://installrails.com/steps/install_xcode
But in my command line tools Xcode 7.1.1 (7B1005) appears and I cannot modify it.
I left it as it is and then tried to write this simple command in Terminal and it does not work :
$ jot - 1 25
It says command not found.
Can you please give some directions.