While I was doing snort -c /usr/local/snort/etc/snort.conf --dump-dynamic-rules=/usr/local/snort/so_rules CentOS6.2 received an error like this:
error while loading shared libraries:
libsfbpf.so.0: cannot open shared object file: No such file or directory
The same error occurs when doing snort -c /usr/local/snort/etc/snort.conf -T
The way to solve this is to type ldconfig, after that try the snort -c command as mentioned above.
cyruslab 
made my day..thanks..:)
thank you very much, very helpfull
Thanks dear..!! it worked…!!
Thanks again for saving time.. in fixing it…!!
Perfect, thanks
Great post , worked for me too =D
Thank you very muh!
as of snort 2.9.7, with latest libdnet and daq etc… this still works
Awesome!
I had same problem, but your solution worked like a charm, Thanks
Worked for me.
Thank you! I had this issue