root@potato:~# apt-get upgrade -y
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up initramfs-tools (0.103ubuntu4.4) ...
update-initramfs: deferring update (trigger activated)
Setting up linux-image-3.13.0-83-generic (3.13.0-83.127) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
The link /initrd.img is a dangling linkto /boot/initrd.img-3.13.0-83-generic
vmlinuz(/boot/vmlinuz-3.13.0-83-generic
) points to /boot/vmlinuz-3.13.0-83-generic
 (/boot/vmlinuz-3.13.0-83-generic) -- doing nothing at /var/lib/dpkg/info/linux-image-3.13.0-83-generic.postinst line 491.
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.13.0-83-generic /boot/vmlinuz-3.13.0-83-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-83-generic /boot/vmlinuz-3.13.0-83-generic
update-initramfs: Generating /boot/initrd.img-3.13.0-83-generic

gzip: stdout: No space left on device
E: mkinitramfs failure cpio 141 gzip 1
update-initramfs: failed for /boot/initrd.img-3.13.0-83-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-3.13.0-83-generic.postinst line 1025.
dpkg: error processing package linux-image-3.13.0-83-generic (--configure):
 subprocess installed post-installation script returned error exit status 2
Processing triggers for initramfs-tools (0.103ubuntu4.4) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-96-generic

gzip: stdout: No space left on device
E: mkinitramfs failure cpio 141 gzip 1
update-initramfs: failed for /boot/initrd.img-3.13.0-96-generic with 1.
dpkg: error processing package initramfs-tools (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 linux-image-3.13.0-83-generic
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)


root@potato:~# df -h
Filesystem                                     Size  Used Avail Use% Mounted on
udev                                           487M   12K  487M   1% /dev
tmpfs                                          100M  516K   99M   1% /run
/dev/mapper/potato--vg-root                     15G  5.8G  8.0G  42% /
none                                           4.0K     0  4.0K   0% /sys/fs/cgroup
none                                           5.0M     0  5.0M   0% /run/lock
none                                           497M     0  497M   0% /run/shm
none                                           100M     0  100M   0% /run/user
/dev/sda1                                      236M  219M  4.5M  99% /boot