[Solved] After running tail -f /var/log/app.log, you add a new log entry to app.log. What will tail display? — Ans: It will immediately show the new log entry appended to the file. | Linux CLI

Linux CLI - Viewing and Editing Files

After running tail -f /var/log/app.log, you add a new log entry to app.log. What will tail display?

AIt will restart and show the entire file from the beginning.

BIt will immediately show the new log entry appended to the file.

CIt will stop displaying output until restarted.

DIt will show an error indicating the file changed.

Step-by-Step Solution

Solution:

Step 1: Understand tail -f behavior
The -f option keeps the file open and watches for new lines.
Step 2: Adding new lines
When a new line is appended, tail -f immediately outputs it to the terminal.
Final Answer:
It will immediately show the new log entry appended to the file. -> Option B
Quick Check:
Does tail -f show appended lines live? Yes [OK]

Quick Trick: tail -f outputs new appended lines live [OK]

Common Mistakes:

MISTAKES

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