unable to install updates, system reports unavailable disk space while disk is almos empty

[Tarik]

Trying to update software but unable, error messages saying disk is full while it's not!

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: linux-image-3.19.0-33-generic 3.19.0-33.38~14.04.1
ProcVersionSignature: Ubuntu 3.19.0-31.36~14.04.1-generic 3.19.8-ckt7
Uname: Linux 3.19.0-31-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
Date: Wed Nov 18 06:15:58 2015
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2015-08-22 (87 days ago)
InstallationMedia: Ubuntu-Server 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.4
 apt 1.0.1ubuntu2.10
SourcePackage: linux-lts-vivid
Title: package linux-image-3.19.0-33-generic 3.19.0-33.38~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)