A script that runs in an interactive shell may depend on a working directory or PATH that cron never receives. 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. Scheduled tasks run in a smaller environment, so success should be measured from their output rather than from the presence of a timetable entry. The outcome must be checked after the command runs; an exit code alone does not prove the service is healthy.
A practical way forward
Use explicit paths, log standard error and test under the same user account that runs the schedule. 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
A backup script invoking node by name might fail at night if that binary exists only in the operator’s interactive PATH. 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 redirecting every error to nowhere; a silent failure can continue for weeks before anyone notices. 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.