When I try and execute commands in bash, I get an error like:

bash: cannot create temp file for here-document: No space left on device

I can't even install some tools to scan the filesystem to find what's consuming all the space. When I try to install anything, it first complains that:

You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 linux-headers-generic : Depends: linux-headers-3.13.0-95-generic but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

but then when I run sudo apt-get -f install, that fails with:

No apport report written because the error message indicates a disk full error
                                                                              dpkg: error processing archive /var/cache/apt/archives/linux-headers-3.13.0-95-generic_3.13.0-95.142_amd64.deb (--unpack):
 error creating symbolic link `./usr/src/linux-headers-3.13.0-95-generic/include/linux/ecryptfs.h': No space left on device
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

However, if I run df -H, it shows that my / partition is only 82% full and still has 1.5G of space left.

Why is no free space being reported? How do I confirm it's referring to root, and if so, why?

closed as unclear what you're asking by derobert, Julie Pelletier, Anthon, GAD3R, PersianGulf Sep 9 '16 at 19:58

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 6
    Check df -i to see if you've run out of inodes. Also, is /tmp on the same partition or not? – derobert Sep 8 '16 at 18:35
  • 1
    It might be beneficial to boot a live OS to debug this. fdisk -l should list all the partitions on the system and how full they are. – Centimane Sep 8 '16 at 18:37
  • 5
    fdisk doesn't have a clue about the filesystems in the partitions... – ilkkachu Sep 8 '16 at 19:04
  • The output of df -h /tmp would be very useful in your Question please – roaima Sep 9 '16 at 16:55

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