# disk info
lsblk
sudo fdisk -l
sudo parted -l
gnome-disks


sudo umount -f /mnt


umount --lazy /mnt/data


## ntfs resize:
sudo ntfsfix /dev/sda2
# Shrink the NTFS Partition:
sudo ntfsresize --size 100G /dev/sda2 (-f)


mkdir 


# folder size:
du -hs 

# find big files
find / -type f -size +100M