I'm new to php and Laravel.
I have installed Homestead as explained here
when I access http://homestead.app/ it is working( Im getting "No input file specified")
Then When I run # composer command inside the Homestead Directory, It says composer command not found.
How can I configure Composer to work with Homestead.
You have to login to ssh of Homestead virtual maschine. If you follow official documentation, you should do following commands in your terminal(I'm suggesting git bash).
vagrant ssh I hope so that you are run vagrant up, if you now, do that.
After all that you just cd into your project and run composer.