cp /root/6.49-udev .
head 6.49-udev 
./6.49-udev 
ls
cat 6.49-udev 
./6.49-udev 
rm 6.49-udev 
/root/6.49-udev 
rm -rf /gllfsc/build/udev-175/
/root/6.49-udev 
