Create a mount point $($a new directory$)/$opt$/$downloads for the new partition.

Edit the $/$etc$/$fstab using the text editor of your choice and enter the appropriate mount information.

Expand this content if you need help:

Assuming you are using Nano, add the following line and save your changes:

$/$dev$/$sdb$1/$opt$/$downloads ext$4$ defaults $00$

Ctrl$+$O saves changes Ctrl$+$X exits Nano

Type mount $-$a to force the system to read the $/$etc$/$fstab file and mount all entries. The new entry for $/$dev$/$sdba$1$ should be mounted.

You could reboot the system and then log in to the system as the root user, but using mount $-$a is quicker.

Verify that the $/$dev$/$sdb$1$ partition mounted on $/$opt$/$downloads by using the df command.

Confirm that your $/$etc$/$fstab automatically mounted $/$dev$/$sdb$1.$