mounting external USB drive in linux with command line

i just bought an external usb 2.0 drive for my server and i need to back up all my data to the pin drive/hard drive and i am not familiar with linux that much to know how to mount a usb device on these type of computers and i was wondering if you guys at www.webune.com could help me. i see alot of tutorials on linux but i didn't find anything that would show me how to be mounting a sub drive.

the instructions say that i should just connect or plug the usb cable to the usb port and the system will recognize it, but i don't think the operating system is not seen it at all and i don't know where linux lists all its drives.

thanks