AHK/AutoIT alternative for Raspberry Pi based OS

Im gonna be running a bot for a browser based MMO using a friend's Raspberry Pi..
But I just realised that the Pi cant run AHK scripts as AHK is only made for windows..
Are there any alternatives for Rasbian OS ? Anything at all for Ubuntu OS even, that is easy to learn
I believe bash scripts will fulfil my purpose.. any pointers to tutorials will be appreciated