my system warned me that I only have a gig of space left. But when I open
the disk usage analyzer and scan the filesystem / is 96% full but none of
the folders it contains show they are full at all (except home which is on
it's own partition. The directory of / shows that it is only 7600 full :

bmike1@c521 / $ ls -l
total 104
drwxr-xr-x   2 root root  4096 Sep 24 08:39 bin
drwxr-xr-x   3 root root  4096 Aug  9 06:33 boot
drwxr-xr-x   2 root root  4096 Oct 25  2014 cdrom
drwxr-xr-x  17 root root  4560 Sep 25 10:19 dev
drwxr-xr-x   2 root root  4096 Oct 25  2014 entertainment
drwxr-xr-x 164 root root 12288 Sep 25 10:19 etc
drwxr-xr-x   4 root root  4096 Jun  6 17:35 home
lrwxrwxrwx   1 root root    33 Dec 22  2014 initrd.img ->
boot/initrd.img-3.13.0-37-generic
lrwxrwxrwx   1 root root    33 Oct 25  2014 initrd.img.old ->
boot/initrd.img-3.13.0-24-generic
drwxr-xr-x  26 root root  4096 Mar 16  2015 lib
drwxr-xr-x   2 root root  4096 Feb 26  2015 lib32
drwxr-xr-x   2 root root  4096 Feb 26  2015 lib64
drwx------   2 root root 16384 Oct 25  2014 lost+found
drwxr-xr-x   3 root root  4096 Oct 26  2014 media
drwxr-xr-x   2 root root  4096 Jan  2  2015 mnt
drwxr-xr-x   5 root root  4096 Feb 23  2015 opt
dr-xr-xr-x 214 root root     0 Sep 25 09:36 proc
drwx------  14 root root  4096 Mar  6  2015 root
drwxr-xr-x  28 root root   940 Sep 25 09:43 run
drwxr-xr-x   2 root root 12288 Sep 24 08:39 sbin
drwxr-xr-x   2 root root  4096 May 29  2014 srv
dr-xr-xr-x  13 root root     0 Sep 25 09:37 sys
drwxrwxrwt  14 root root  4096 Sep 25 17:44 tmp
drwxr-xr-x  11 root root  4096 Nov 11  2014 usr
drwxr-xr-x  12 root root  4096 Nov  3  2014 var
lrwxrwxrwx   1 root root    30 Dec 22  2014 vmlinuz ->
boot/vmlinuz-3.13.0-37-generic
lrwxrwxrwx   1 root root    30 Oct 25  2014 vmlinuz.old ->
boot/vmlinuz-3.13.0-24-generic

 $ df /
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sdb1       23642608 21332532   1086256  96% /

Where did all of my space go?
Is my understanding wrong?
-- 
:-)~MIKE~(-: