adminuser@ubuntu:/tmp$ sudo du -mxd 2 / | sort -n
du: cannot access `/var/spool/mqueue/tfs2SG2s1e002168': No such file or directory
0	/dev
0	/proc
0	/run
0	/sys
1	/etc/acpi
1	/etc/alternatives
1	/etc/apache2
1	/etc/apm
1	/etc/apparmor
1	/etc/apparmor.d
1	/etc/apport
1	/etc/apt
1	/etc/bash_completion.d
1	/etc/byobu
1	/etc/ca-certificates
1	/etc/calendar
1	/etc/chatscripts
1	/etc/console-setup
1	/etc/cron.d
1	/etc/cron.daily
1	/etc/cron.hourly
1	/etc/cron.monthly
1	/etc/cron.weekly
1	/etc/dbus-1
1	/etc/default
1	/etc/depmod.d
1	/etc/dhcp
1	/etc/dpkg
1	/etc/fonts
1	/etc/fstab.d
1	/etc/groff
1	/etc/grub.d
1	/etc/ifplugd
1	/etc/init
1	/etc/init.d
1	/etc/initramfs-tools
1	/etc/insserv
1	/etc/insserv.conf.d
1	/etc/iproute2
1	/etc/iscsi
1	/etc/kbd
1	/etc/kernel
1	/etc/landscape
1	/etc/ldap
1	/etc/ld.so.conf.d
1	/etc/libnl-3
1	/etc/logcheck
1	/etc/logrotate.d
1	/etc/lsb-base
1	/etc/mail
1	/etc/modprobe.d
1	/etc/mysql
1	/etc/network
1	/etc/newt
1	/etc/opt
1	/etc/pam.d
1	/etc/perl
1	/etc/php5
1	/etc/pm
1	/etc/ppp
1	/etc/profile.d
1	/etc/python
1	/etc/python2.7
1	/etc/rc0.d
1	/etc/rc1.d
1	/etc/rc2.d
1	/etc/rc3.d
1	/etc/rc4.d
1	/etc/rc5.d
1	/etc/rc6.d
1	/etc/rcS.d
1	/etc/resolvconf
1	/etc/rsyslog.d
1	/etc/security
1	/etc/sgml
1	/etc/skel
1	/etc/ssh
1	/etc/ssl
1	/etc/sudoers.d
1	/etc/sysctl.d
1	/etc/systemd
1	/etc/terminfo
1	/etc/udev
1	/etc/ufw
1	/etc/update-manager
1	/etc/update-motd.d
1	/etc/update-notifier
1	/etc/vim
1	/etc/w3m
1	/etc/wpa_supplicant
1	/etc/X11
1	/etc/xml
1	/home
1	/home/adminuser
1	/lib64
1	/lib/apparmor
1	/lib/crda
1	/lib/hdparm
1	/lib/init
1	/lib/lsb
1	/lib/plymouth
1	/lib/recovery-mode
1	/lib/resolvconf
1	/lib/systemd
1	/lib/terminfo
1	/lib/udev
1	/lib/ufw
1	/lost+found
1	/media
1	/media/cdrom
1	/mnt
1	/opt
1	/root
1	/root/.aptitude
1	/selinux
1	/srv
1	/tmp
1	/usr/games
1	/usr/include
1	/usr/local
1	/var/crash
1	/var/htaccess
1	/var/local
1	/var/mail
1	/var/opt
1	/var/tmp
2	/lib/xtables
2	/var/MYSQL_BACKUP
5	/boot/grub
6	/var/www
7	/etc
8	/sbin
8	/var/backups
9	/bin
14	/lib/x86_64-linux-gnu
24	/var/log
27	/var/places
28	/usr/sbin
49	/boot
51	/lib/firmware
113	/usr/bin
128	/usr/lib
171	/usr/share
193	/usr/src
234	/var/lib
285	/lib/modules
322	/var/cache
353	/lib
398	/var/spool
631	/usr
1018	/var
2073	/