Originally Posted by lookup
Is there any alternative to mount command to access usb on linux?
No, there isn't. If you want to read the files on a USB drive, you mount it first. That's just the way it works.
The only real alternative is to write your own program to directly access the USB device. Basically, you'd be reinventing the filesystem driver. I don't know why you'd want to do that, though. It's a lot more work than just mounting the drive and, to be honest, I can't really think of anything it would gain you.
Perhaps if you tell us what you're trying to accomplish by not mounting the drive, somebody could suggest a work-around.