A system administrator is troubleshooting a service that writes logs to /var/log/app.log. The administrator wants to monitor the log in real-time as new entries are added, but only wants to see lines containing the word 'ERROR'. Which command should be used?

grep ERROR /var/log/app.log | tail -f

tail -f /var/log/app.log | grep ERROR

less +F /var/log/app.log | grep ERROR

tail /var/log/app.log | grep ERROR

LPI LPIC-1:Linux Administrator (101-500)

Domain 3Objective 3

103.3 Perform Basic File Management LPIC-1 Practice Questions (Page 5)

Part of the Topic 103: GNU and Unix Commands domain, which makes up ~19% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–11 in this domain), expect 1–1 from this objective — we provide 25 practice questions to prepare you well beyond it. (estimate)

25questions here

5free pages

10concepts

Questions 21–25

21foundation · easy
Which command searches a pre-built database of filenames and is typically faster than a live filesystem search?
Select an answer first
22foundation · easy
Which ln option creates a symbolic link instead of a hard link?
Select an answer first
23application · medium
A system administrator is troubleshooting a service that writes logs to /var/log/app.log. The administrator wants to monitor the log in real-time as new entries are added, but only wants to see lines containing the word 'ERROR'. Which command should be used?
Select an answer first
24foundation · easy
Which command is specifically designed to remove empty directories?
Select an answer first
25foundation · easy
Which command is used to continuously display new lines appended to a file, such as a log file?
Select an answer first

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103.3 Perform Basic File Management LPIC-1 Practice Questions (Page 5)

Questions 21–25

Which command searches a pre-built database of filenames and is typically faster than a live filesystem search?

Which ln option creates a symbolic link instead of a hard link?

A system administrator is troubleshooting a service that writes logs to /var/log/app.log. The administrator wants to monitor the log in real-time as new entries are added, but only wants to see lines containing the word 'ERROR'. Which command should be used?

Which command is specifically designed to remove empty directories?

Which command is used to continuously display new lines appended to a file, such as a log file?

Keep studying — Topic 103: GNU and Unix Commands