Ubuntu: Mount The Drive From Command Line

use the mount command.

# Open a command-line terminal (select Applications > Accessories > Terminal), and then type the following command to mount /dev/sdb1 at /media/guo/4T.

 You need to create a mount point using the mkdir command. This will be the location from which you will access the /dev/sdb1 drive.
　　$ sudo mkdir /media/guo/4T

To mount the drive, enter:
　　$ sudo mount /dev/sdb1 /media/guo/4T
　　$ df -H
To view files cd to /media/guo/4T, enter:
　　$ cd /media/guo/4T
　　$ ls -l