ls options (-l, -a, -h, -R) in Linux CLI - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What does ls -l display?

You run the command ls -l in a directory. What kind of information will you see in the output?

A A detailed list showing file permissions, number of links, owner, group, size, and modification date for each file.

B A list of all files including hidden ones, but without details.

C A recursive list of all files in the directory and its subdirectories.

D A list showing file sizes in human-readable format without other details.

💡 Hint

Think about what the long format option means for file details.

The -l option shows a long listing format with detailed file information like permissions, owner, size, and modification date.

💻 Command Output

intermediate

What is the effect of ls -a?

You run ls -a in a directory. What will the output include?

A Only visible files and directories, excluding hidden ones.

B A recursive list of files in the current directory and all subdirectories.

C A detailed list of files with sizes in human-readable format.

D All files including hidden files that start with a dot (.), but without detailed info.

💡 Hint

Hidden files in Linux start with a dot.

The -a option shows all files including hidden ones (those starting with a dot), but does not add details.

💻 Command Output

advanced

What does ls -h do when combined with -l?

You run ls -lh. What difference does the -h option make in the output?

A It hides hidden files from the list.

B It shows file sizes in a human-readable format like KB, MB, or GB.

C It shows file sizes in bytes only.

D It lists files recursively in all subdirectories.

💡 Hint

Think about how humans prefer to read file sizes.

The -h option makes file sizes easier to read by converting bytes into KB, MB, or GB.

💻 Command Output

advanced

What is the output of ls -R?

You run ls -R in a directory. What will the output show?

A A detailed list of files with sizes in human-readable format.

B All files including hidden ones in the current directory.

C A recursive listing of all files in the current directory and all its subdirectories.

D Only files in the current directory without details.

💡 Hint

The -R option means recursive.

The -R option lists all files in the current directory and all subdirectories recursively.

🧠 Conceptual

expert

Which ls command combination shows all files recursively with human-readable sizes and detailed info?

You want to see every file including hidden ones, in all subdirectories, with detailed info and sizes easy to read. Which command should you use?

A ls -Ralh

B ls -hRal

C ls -lRa

D ls -laRh

💡 Hint

Order of options usually does not matter, but some combinations may cause errors or unexpected output.

The correct combination is ls -Ralh which means recursive (-R), all files including hidden (-a), long listing (-l), and human-readable sizes (-h).