Thanks a lot, this is the thing i m exactly looking for ,
and one more thing is for a certain commands like reboot, we can find two paths, can we put any one of them, both of them behaves the same thing only
for example, for reboot im finding two command path ,
and the next thing is /sbin contains commands for the superuser
/bin comtains commands for the user
then what does /usr/bin or /usr/sbin contains???