OwnCloud add-on thread

Though I didn't realize this before, the problem starts at the first command: #!/bin/bash
which returns: "-bash: !/bin/bash: event not found"
I originally thought the # indicated a remark line and ignored this.

The next issue happens at: "tar -xjf owncloud*.bz2" (which I tried as provided but also replaced with "tar -xjf owncloud-4.5.6.tar.bz2" to see if I got different results)
It returns -
"tar: bzip2: Cannot exec: No such file or directory"
"tar: Error is not recoverable: exiting now"
"tar: Child returned status 2/"
"tar: Error exit delayed from previous errors"

Finally: "mv owncloud /usr/share/"
gives me "cannot stat `owncloud': No such file or directory"

I don't go beyond this as there doesn't seem to be any point to it after being told the files don't exist.

I am connecting via PuTTY as root and entering the commands one at a time, not as a script. I don't feel this changes anything for the errors I'm receiving, but it is possible this is where my error lies. If that is the case, is there a particular folder or share where the script needs to be?

Thanks very much for any and all help.