What to do if you get rails: command not found

From DevchixWiki

Under some circumstances, when creating the Rails test app, you may get the following error:

sh.exe": rails: command not found

The solution is (you guessed it) reboot the machine.

Technical details: git bash is a child process of Windows explorer. The Ruby installer adds C:/Ruby/bin (where rails is located) to your Windows PATH environment variable, but currently running Windows explorer processes may not pick up the change until a reboot.