Cannot upgrade Plesk: dpkg: error processing archive /var/cache/apt/archives/linux-headers (–unpack)

Symptoms

• Cannot update Plesk. The following error appears during the process:

  Preparing to unpack .../linux-headers-4.4.0-116_4.4.0-116.140_all.deb ...
  Unpacking linux-headers-4.4.0-116 (4.4.0-116.140) ...
  dpkg: error processing archive /var/cache/apt/archives/linux-headers-4.4.0-116_4.4.0-116.140_all.deb (--unpack):
  unable to create '/usr/src/linux-headers-4.4.0-116/drivers/net/arcnet/Makefile.dpkg-new' (while processing './usr/src/linux-headers-4.4.0-116/drivers/net/arcnet/Makefile'): No space left on device
  dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
  Preparing to unpack .../linux-headers-4.4.0-116-generic_4.4.0-116.140_amd64.deb ...
  Unpacking linux-headers-4.4.0-116-generic (4.4.0-116.140) ...
  dpkg: error processing archive /var/cache/apt/archives/linux-headers-4.4.0-116-generic_4.4.0-116.140_amd64.deb (--unpack):
  unable to create '/usr/src/linux-headers-4.4.0-116-generic/include/config/ncpfs/ioctl/locking.h.dpkg-new' (while processing './usr/src/linux-headers-4.4.0-116-generic/include/config/ncpfs/ioctl/locking.h'): No space left on device
  dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
  Errors were encountered while processing:
  /var/cache/apt/archives/linux-headers-4.4.0-116_4.4.0-116.140_all.deb
  /var/cache/apt/archives/linux-headers-4.4.0-116-generic_4.4.0-116.140_amd64.deb

Cause

Inodes are used on the partition where /usr is mounted.

Resolution

1. Connect to the server via SSH;

2. Check if all kernels are installed correctly:

   # dpkg -l | tail -n +6 | grep -E ‘linux-image-[0-9]+’ | grep -Fv $(uname -r)

   ii linux-image-4.4.0-92-generic
   <..>
   ii linux-image-4.4.0-96-generic
   <..>
   ii linux-image-4.4.0-108-generic
   iU linux-image-4.4.0-112-generic
   ii linux-image-4.4.0-114-generic
   iU linux-image-4.4.0-116-generic

3. If iU is shown more than once, it means that, for example, kernel 4.4.0-112 is not installed properly. Remove it. It is safe, as the command above does not show currently used kernel:

   # dpkg –remove linux-headers-4.4.0-112 linux-image-4.4.0-112-generic linux-image-extra-4.4.0-112-generic

   Note: Replace the version to one that is actually shown on the server

4. Move files of the oldest kernel installed on the server, for example:

   # mv /usr/src/linux-headers-4.4.0-92* /root/

5. Fix the rest:

   # apt-get install -f -y

6. Remove unnecessary packages, including the old kernels:

   # apt autoremove -y

7. Install Plesk updates:

   # plesk installer –select-release-current –reinstall-patch –upgrade-installed-components

8. Upgrade the system packages (not required but recommended):

   # apt-get upgrade -y