Which of the following will execute the command?

A systems administrator is checking the system logs. The administrator wants to look at the last 20 lines of a log.

Which of the following will execute the command?
A . tail -v 20
B . tail -n 20
C . tail -c 20
D . tail -l 20

View Answer

Answer: B

Explanation:

The command tail -n 20 will display the last 20 lines of a file. The -n option specifies the number of lines to show. This is the correct command to execute the task. The other options are incorrect because they either use the wrong options (-v, -c, or -l) or have the wrong arguments (20 instead of 20 filename).

Reference: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 11: Managing Files and Directories, page 352.