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My / folder is reading as full and I can't update software or do anything.

Not sure what I'm doing wrong here.

$ df -h
Results:
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda1             5.7G  5.4G     0 100% /
udev                  1.9G  4.0K  1.9G   1% /dev
tmpfs                 770M  1.1M  769M   1% /run
none                  5.0M     0  5.0M   0% /run/lock
none                  1.9G  808K  1.9G   1% /run/shm
/dev/sda6             961M   18M  895M   2% /tmp
/dev/sda7             9.9G  2.9G  6.6G  31% /home
/dev/sda3             5.7G  140M  5.3G   3% /usr/local
/dev/sda4             2.9G  1.3G  1.4G  49% /var
/dev/sdb1              94G  1.3G   88G   2% /sites
/home/username/.Private  9.9G  2.9G  6.6G  31% /home/username
/dev/sdb5             282G   88G  180G  33% /mnt/multimedia


$ df -h /
Results:
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       5.7G  5.4G     0 100% /

$ du /mnt /media
Results:
4   /mnt/multimedia
8   /mnt
4   /media

This is a new install of Ubuntu 12.04 and I'm not sure how/why the root system is so full.

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huh. I guess it is full, somehow. I adjusted the questions with zwets suggested outputs –  Jesse Mar 12 '13 at 7:10
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1 Answer

up vote 9 down vote accepted

Some likely reasons for an overflowing root partitions are:

1. Core dumps filling up the disk.

Check with:

    find / -xdev -name core -ls -o  -path "/lib*" -prune

2. Unnecessary packages filling up the space.

The following command will remove all automatically installed packages, which aren't required any more. (Because the dependency which force the installation in the past has been removed.)

    apt-get autoremove --purge 

3. Outdated kernel packages

Check how many kernel packages are installed, and remove outdated kernel versions. You may investigate the current situation with:

    dpkg -l "linux*{tools}*" |grep ^.i

Remove any kernel versions you doesn't need any more

4. Hidden storage

Other mounted partitions may hide used storage. To investigate this mount the root file system temporary on a second location:

    mkdir /tmp/2ndRoot
    mount /dev/sda1 /tmp/2ndRoot

Now look on every directory, that is normally hidden by another mount, e.g.:

  • tmp
  • home
  • run
  • var
  • usr/local

    and in your case also:

  • sites

Caveat

Don`t forget to control at the end the consistency of your installation with:

apt-get install -f

Notes

Reserved storage

/dev/sda1       5.7G  5.4G     0 100% /

The output shows that you have still some space, but it seems to be reserved for root. The good point is that your system functionality is currently still be given.

But you should fix the problem soon.

Space consumption of ubuntu 12.04

To have only 5.7 Gb for an ubuntu installation seems to be a little bit to less. You should remove some not essentially needed software packages.

My current installations have 10-14 Gb for the root and binary (aka /usr) partitions.

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Thanks I ended up just bumping up the root partition and I'll keep an eye on it should I have to work in your trick to view all the folders (maybe local/bin?). Odd that the disk space analyzer tool led me to believe it was the mounted drives at /media/ since they were all red and full. –  Jesse Mar 12 '13 at 20:42
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