> If you search the role or the prototype of a function for example, > go to your include directory and if your seek the function foo, type > > grep -r foo * > > to find in which file its prototype resides. Hi: appreciate your detail and kind help. The instruction I mean is some terminal commands, like fdisk, du, df , date, etc, not kernel apis. I know we can use man to find the detail usage of each command. But I want to know where I can find the list for different categories such that once I find I need some network commands but I have no idea which one is suitable for me, I can check every on in the network category. appreciate your kind help, miloody -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ