Eu não tenho certeza, mas acho que eu não tenho esta pasta. Indo pelo locais, computador, etc eu não achei a pasta fstab.
Pelo terminal apareceu isso:
:~$ sudo cat /etc/fstab
# /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
/dev/sda1 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=c43fca71-0c97-4232-87e0-d083ccb09521 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
Aguardo orientação