How to let ubuntu mount at startup?

1 sudo fdisk -l

2 sudo vi /etc/fstab

add the following:

/dev/sda4 /media/diskA ext4 defaults 0 0

/dev/sda5 /media/diskB ntfs defaults 0 0

3 sudo mkdir /media/diskA

sudo mkdir /media/diskB

to test the effect, run

sudo mount -a

Have fun!