Você precisar editar o /etc/fstab, pega como exemplo uma linha que já está no arquivo.
Caso tenha dúvida, coloca aqui a saída do comando:
sudo fdisk -l
Assim podemos ajudar você.
o arquivo contém essas informações:
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda5 during installation
UUID=34f400e5-ccd8-45e2-988a-7addc54d87ee / ext4 errors=remount-ro 0 1
# swap was on /dev/sda6 during installation
UUID=7162fefb-b44a-4454-955e-49451e2678cd none swap sw 0 0