[Solved] If you run tail -n 5 /var/log/cron | grep alice and get no output, what does it mean? — Ans: No cron jobs run by user alice in last 5 log lines | Linux CLI

Linux CLI - Cron and Scheduling

If you run tail -n 5 /var/log/cron | grep alice and get no output, what does it mean?

AThe grep command is incorrect

BThe cron log file is empty

CNo cron jobs run by user alice in last 5 log lines

DThe tail command is showing the first 5 lines

Step-by-Step Solution

Solution:

Step 1: Understand command sequence
tail -n 5 shows last 5 lines of the cron log. grep alice filters lines containing 'alice'.
Step 2: Interpret no output
No output means none of the last 5 lines mention 'alice'. The file is not necessarily empty.
Final Answer:
No cron jobs run by user alice in last 5 log lines -> Option C
Quick Check:
No grep output means no matching lines found [OK]

Quick Trick: No grep output means no matching lines found [OK]

Common Mistakes:

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If you run tail -n 5 /var/log/cron | grep alice and get no output, what does it mean?