Have you tried it without the sudo su step?

What command is it barking about?

Also, if you're already sudo su, why are you sudo'ing the final command?

If i can rename it del it and make it executable through terminal it means i have enough perms and my path is correct im not new on linux

Try this (if you haven't already):

http://www.johanpaul.com/blog/2012/02/sudo-script-sh-command-not-found-on-ubuntu/

Edit -

The actual 'fix' from that post:

"Update: Seem Björn's blog is down, so I'll post the solution here. Put the following line to your $HOME/.bashrc file:

alias sudo='sudo env PATH=$PATH $@'
And the run source $HOME/.bashrc (this will not be necessary on subsequent boots or starts of the terminal). You should again be able to run your scripts with sudo.

This will enable the fix only for me, as I put the alias in my .bashrc file, so it's not even a terrible security risk. And that's fine."

hayabusa the problem was so stupid!
When i used chmod +x it won't make executable. I just used chmod 777 and msf is installing now!!!

I just noticed in your first post that you had a capital X which won't change it, but your last post has a lowercase x. Just interested to know, do you still get that problem if use a lowercase x?

Andrew man your not bothering me i just wanted to mention my situation. please don't be sad of my reply.