This error seems to imply the system did not have a /var/tmp at the time of the package install:
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.13.0-49-generic /boot/vmlinuz-3.13.0-49-generic update-initramfs: Generating /boot/initrd.img-3.13.0-49-generic mktemp: failed to create file via template ‘/var/tmp/mkinitramfs-FW_XXXXXX’: No such file or directory update-initramfs: failed for /boot/initrd.img-3.13.0-49-generic with 1. run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1 ** Changed in: initramfs-tools (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1473835 Title: package linux-image-extra-3.13.0-49-generic 3.13.0-49.83 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1473835/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs