To mount a drive from the command line in Ubuntu, you can use the mount command. The basic syntax is:
mount [OPTIONS] DEVICE MOUNTPOINT
Where DEVICE is the name of the device you want to mount, and MOUNTPOINT is the location where you want to mount the device.
For example, to mount a device located at /dev/sdb1 to the /mnt directory, you would run the following command:
sudo mount /dev/sdb1 /mnt
Note that you need to run this command as the root user or with sudo in order to have the necessary permissions to mount a device.
If the file system on the device is not recognized by Ubuntu, you may need to specify the file system type using the -t option. For example, to mount a device formatted with the ext4 file system:
sudo mount -t ext4 /dev/sdb1 /mnt
You can also use the df command to see a list of mounted file systems and their corresponding mount points.