Installer Logs
Debian and Ubuntu style installers write detailed session logs under /var/log/installer during OS setup and major installation workflows, including syslog traces, hardware detection output, package install transcripts, and debconf or partman logs used for troubleshooting. These files are not active runtime caches for everyday use after installation; they are leftover diagnostic records from the installer environment that can persist indefinitely and consume space in the system log area. Kudu removes old installer log files from /var/log/installer without touching installed packages, user accounts, passwords, or current system settings.
Why clean Installer Logs?
- Repeated OS installs, upgrades, or recovery sessions leave multiple installer transcripts behind, and the visible symptom is /var or / becoming unexpectedly full even though personal files have not grown
- Verbose package and hardware detection logs under /var/log/installer can accumulate on small root partitions, leading to low disk space warnings during apt operations and failed updates that report insufficient space on /
- Old debconf, partman, and syslog installer records are no longer used for booting or daily operation, but they continue occupying log storage and make disk usage audits show large space consumed under /var/log
- Installer logs often preserve full hardware probing and partitioning output from previous setups, so cleaning removes stale diagnostic history that can confuse troubleshooting when you are trying to inspect only current logs
- On systems with tight /var allocations, leftover installer logs contribute to log directory growth and you may notice logrotate or package maintenance tasks struggling because the filesystem is near capacity
- These files are historical text logs rather than live databases, so deleting them clears disk space immediately without affecting installed applications, while keeping them can leave obsolete installation errors visible long after the problem was resolved
Cache paths Kudu targets
Linux
/var/log/installer |
Common questions about Installer Logs
Download Kudu and reclaim your disk space.
Available on Windows, macOS, and Linux. No account required, no feature gates, no telemetry without consent. All cleaning targets are open source and community-auditable.