I think that would be something you'll have to write for yourself if you really want it like that. In my opinion it will be a huge security risk.
First of all for obvious reasons you'll need to have it run on HTTPS and not HTTP. Next, most if not all of the commands you list require root privileges, not save to run over HTTP or HTTPS.
I think you'd better go with an SSH tunnel to execute your commands and report the output in a textfile/xmlfile on your server. Then you could show the output on a webpage.
If you want to set this up with SSH on multiple servers it might be interesting to look into DSSH
Needless to say that you will need SSH enabled on the remote servers and be able to execute the commands.