Where it says:
Code:
/dev/root on / type yaffs (rw)
this means that the root directory "/" also known as SLASH is the mount point. Therefore if you do:
you will find yourself at the point where /dev/root was mounted.
The USB is NOT mounted, the rest of those are run time only file systems necessary for your kernel to operate, what you would see is something like:
Code:
/dev/sda1 on /udisk type ext4
or something similar. NOT to say that this USB stick has ext4 file system, you may have to determine how it is formatted. If it's just a general USB stick purchased from retail, then likely it is vfat file system. And next you have to mount it. In order to do this you'll need to create a mount point, which is a directory. You'll also have to do this as root. Since sudo is not available, then you'll have to log in as root.
When you plug in the USB stick, look at your system log and determine what device letter it gets assigned, such as /dev/sda, /dev/sdb, or /dev/sdf something like that.
Next try to determine how many partitions and of what type are on that disk by using fdisk, such as fdisk /dev/sda and then get a print of the partition table. This will show you how many logical partitions and of what type are on that disk. Then you can try to mount them using the mount command. You can use the mount command without the -t option and see if it can determine the file system type on it's own.