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The journald entries have filled a Linux machine's /var volume. Which of the following is the best command for a systems administrator to use to free up the disk space occupied by these entries?
Correct Answer: A
To safely reduce the size of journald logs, journalctl --rotate forces log rotation, and journalctl --vacuum- time=1s removes entries older than the specified time. This approach efficiently manages log files without directly deleting files, which could risk corruption. CompTIA Linux+ advises controlled log management for journald to avoid unintended data loss. Reference: CompTIA Linux+ Study Guide.