cat not recognised as an internal or external command

Learning about big query on google app engine and wanted to try out this library that also required me to know about Converting the service account credential to other formats. I have tried the command

# Convert the key from pkcs12 to pkcs1 (PEM).
$ cat /path/to/xxxx-privatekey.p12 | openssl pkcs12 -nodes -nocerts -passin pass:notasecret | openssl rsa > /path/to/secret.pem

on the command line but I get

'cat' is not recognized as an internal or external command,
operable program or batch file.

How do I resolve this?


Use windows powershell. WIndows 7 afterwards, it comes along with the windows.