this is just a small tweak - some of the scripts in bin/ directory were 0644 and running bin/start-all.sh or bin/stop-all.sh resulted in "Permission denied" error, though the scripts bin/start-(hmon|raidnode)-remote.sh fail with a nice error message if the config(?) files - conf/hmon and conf/raidnode - are missing.
I was just trying to play with this version of Hadoop and thought I would contribute this tweak. Feel free to close without merging if you see it as unneccessary. :-)
P.S.S. I have signed the Facebook Contributor Agreement.
Updated file permisions in bin/ directory.