Public bug reported: In my case I ran out of diskspace in /usr which required a temporary 4 GB of more data during upgrade. Things just start to fail, and I can tell you - then you are screwed. I find this unacceptable for a wide- spread official LTS upgrader.
ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: ubuntu-release-upgrader-core 1:18.04.22 ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18 Uname: Linux 4.15.0-30-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: KDE Date: Fri Aug 10 15:14:33 2018 InstallationDate: Installed on 2016-01-11 (941 days ago) InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: release-upgrade UpgradeStatus: Upgraded to bionic on 2018-08-09 (0 days ago) mtime.conffile..etc.update-manager.release-upgrades: 2018-08-06T15:08:30.181962 ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug bionic dist-upgrade -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1786484 Title: Updater doesn't check size of partitions. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1786484/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs