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
Ubuntu: Mount The Drive From Command Line
原文：https://www.cnblogs.com/wkwzn2019/p/13167298.html