010-160 Command Line Navigation 3

Question 1

Which `ls` option shows hidden files (those starting with a dot)?

Accepted Answer

-a

Answer

`ls -a` (all) lists all files including those whose names begin with a dot, which are hidden by default.

Question 2

What is the purpose of the `file` command in Linux?

Accepted Answer

Determines the type of a file

Answer

The `file` command examines a file's contents and reports its type (e.g., ASCII text, ELF binary, JPEG image).

Question 3

Which command lists directory contents in long format showing permissions, owner, and size?

Accepted Answer

ls -l

Answer

`ls -l` displays a detailed long listing including permissions, link count, owner, group, size, and modification time.

Question 4

What does the `.` (single dot) represent in a Linux filesystem path?

Accepted Answer

The current directory

Answer

A single dot `.` refers to the current directory, so `./script.sh` runs a script in the current location.

Question 5

Which command would you use to find out what type of shell you are currently running?

Accepted Answer

echo $SHELL

Answer

`echo $SHELL` prints the path to the current user's default shell (e.g., /bin/bash).

(010-160) LPI Linux Essentials Practice Test