An application may report no space left even when the operator has looked only at the total gigabytes available on another partition. Start with the exact machine, distribution and service at hand. A procedure that works in a tutorial may need adjustment before it belongs on a production system.
Why this deserves attention
Linux distributions offer different release schedules, package sources and support windows. Ubuntu’s security documentation is a useful example of how updates are maintained, but commands and support terms should always be checked for the distribution and version in use. A cautious change includes a backup and a way to verify the result. Filesystems can run short of capacity or inodes, and the relevant mount point may be different from the one shown on a dashboard. The outcome must be checked after the command runs; an exit code alone does not prove the service is healthy.
A practical way forward
Check both space and inode usage on the affected filesystem, then trace the directories that are growing. Capture the current configuration and arrange a recovery path. Make one change, inspect logs or service behaviour, and only then continue to the next step.
Picture it in a real situation
Millions of tiny temporary files can exhaust inodes while a single backup archive is more likely to consume ordinary capacity. A similar symptom on another machine may have a different cause. Keep the relevant log line and configuration change so the result can be verified later.
What to avoid
Avoid deleting database files or active logs blindly; identify ownership and retention requirements first. Verify the command for the installed distribution and release. A setting that fixes one server may weaken or break another if applied without context.
Takeaway
Change one thing, verify the service and retain a recovery path. That is the core of dependable maintenance.
Sources and further reading: Ubuntu security updates; Ubuntu Server documentation.