Preparing to unpack .../base-files_9.4ubuntu4.6_amd64.deb ...
Unpacking base-files (9.4ubuntu4.6) over (9.4ubuntu4.5) ...
Processing triggers for plymouth-theme-ubuntu-text (0.9.2-3ubuntu13.2) ...
update-initramfs: deferring update (trigger activated)
Processing triggers for cracklib-runtime (2.9.2-1ubuntu1) ...
Processing triggers for install-info (6.1.0.dfsg.1-5) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for initramfs-tools (0.122ubuntu8.10) ...
update-initramfs: Generating /boot/initrd.img-4.13.0-32-generic
xz: (stdout): Write error: No space left on device
E: mkinitramfs failure cpio 141 xz --check=crc32 1
update-initramfs: failed for /boot/initrd.img-4.13.0-32-generic with 1.
dpkg: error processing package initramfs-tools (--unpack):
 subprocess installed post-installation script returned error exit status 1