Date: 2019aug8
Q. Linux: Prepare new disk on the command line
A. As root...
Use fdisk to partition it
fdisk /dev/sda Replace with your actual disk
n Use the `n` command an accept defaults
w Ask to have it written
q Quit
Format it as ext4
mkfs.ext4 /dev/sda3 Change to your actual partition
Make a mount point
mkdir /stuff
Find its UUID (Unique ID)
blkid /dev/sda3
The result will be something like
/dev/sda3: UUID="fd26215f-132b-4c5a-a511-123456789012" TYPE="ext4"
Add a line to /etc/fstab with the UUID:
UUID=fd26215f-132b-4c5a-a511-123456789012 /stuff ext4 defaults 1 2
Mount it
mount /stuff
Check it
df -h