after yoy type "cd /usr/bin", you don't have to type "./" you just need to type "/" , without the period, or else it won't find the file.

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iPhone 1.1.2 OTB with GeoHot's Gunlock!!!
Operator: Porta (Ecuador) and ICE (Costa Rica)
Call In/Out: Yes/Yes
SMS In/Out: Yes/Yes
GPRS/EDGE:Yes/Yes
MMS In/Out: No/Yes
YouTube: Yes
Makes me look hotter: Yes / I'm hot without it: No
Everything: Yes
SCREW **SIMS