ssh-keygen' is not recognized as an internal or external command

Are you running msysgit, or some other form of Windows git installation? msysgit is only one possible way to run git on Windows but it's probably also the simplest one. It's also the way recommended by the git website at http://git-scm.org/ .

If you are using msysgit, then you need to run the command in Git Bash, not in a standard Windows command line prompt. Git Bash is a prompt that is installed for you by msysgit, and is basically the most common Linux command line shell (bash) packaged for Windows to facilitate command line usage of git. msysgit should also install the ssh-keygen program in a place where it is accessible from Git Bash, but not necessarily from your usual Windows command line prompt.

STEP 1 Install Git.

STEP 2 Add the path of your git to the environment variables like this C:\Program Files (x86)\Git\bin.

STEP 3 Open new terminal session and try ssh-keygen. It will work.

NOTE New Terminal Window is must!

Search your git directory if you already install git

Use git bash should be on your C:\Program Files\Git\bin depend on your installation location

If you already add the path just run sh on your cmd or open sh.exe

type ssh-keygen

Then just insert name and passphrase (You can just type empty string).

If you previously installed Git, open a git-bash and try the command from there.