sudo du -h --max-depth 1 /
14M /etc
du: cannot access ‘/run/user/1000/gvfs’: Permission denied
1.7M /run
du: cannot access ‘/proc/3777/task/3777/fd/4’: No such file or directory
du: cannot access ‘/proc/3777/task/3777/fdinfo/4’: No such file or directory
du: cannot access ‘/proc/3777/fd/4’: No such file or directory
du: cannot access ‘/proc/3777/fdinfo/4’: No such file or directory
0 /proc
152M /opt
8.0K /media
125M /boot
12M /sbin
40K /root
148K /tmp
9.7M /bin
8.0K /dev
4.1G /usr
3.5M /lib32
16K /lost+found
4.0K /cdrom
4.0K /mnt
4.0K /lib64
4.0K /srv
968M /lib
660M /var
13G /home
0 /sys
19G /