RHCSA RHCSA Essential Command-Line Tools 3

Question 1

What does the pipe symbol '|' do in a shell command?

Accepted Answer

Sends stdout of the left command to stdin of the right command

Answer

The pipe operator connects the standard output of one command to the standard input of the next.

Question 2

Which command would you use to count the number of unique lines in a sorted file?

Accepted Answer

uniq -c

Answer

uniq -c prefixes each unique line with its count of occurrences after the file has been sorted.

Question 3

Which find command locates all regular files larger than 100MB under /home?

Accepted Answer

find /home -type f -size +100M

Answer

find uses -type f for regular files and -size +100M for files strictly larger than 100 megabytes.

Question 4

What does 'ls -lh' add over 'ls -l'?

Accepted Answer

Displays file sizes in human-readable format (KB, MB, GB)

Answer

The -h flag makes sizes human-readable by using units like K, M, and G instead of raw bytes.

Question 5

Which command displays the full path of the currently active shell executable?

Accepted Answer

which bash

Answer

which searches PATH directories and prints the full path of the named executable.

RHCSA Exam Practice Test