010-160 Linux Command Line & Shell Scripting 4

Question 1

What does the command tail -f /var/log/syslog do?

Accepted Answer

Continuously displays new lines appended to syslog

Answer

tail -f follows a file and prints new lines as they are written, useful for live log monitoring.

Question 2

In a bash for loop, which syntax correctly iterates over the values 1 2 3?

Accepted Answer

for i in 1 2 3; do echo $i; done

Answer

Bash for loops use the syntax: for variable in list; do commands; done.

Question 3

Which command prints the current working directory?

Accepted Answer

pwd

Answer

pwd (print working directory) outputs the absolute path of the current directory.

Question 4

How do you redirect standard error (stderr) to a file named errors.txt?

Accepted Answer

command 2> errors.txt

Answer

File descriptor 2 refers to stderr, so 2> redirects error output to the specified file.

Question 5

What character begins a comment in a bash script?

Accepted Answer

#

Answer

In bash, everything after # on a line is treated as a comment and ignored by the shell.

(010-160) LPI Linux Essentials Practice Test