Inodes concept in Linux CLI - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What does the command ls -i show?

You run ls -i in a directory. What is the output showing before each filename?

Linux CLI

ls -i

A The inode number of each file

B The file size in bytes

C The file permissions

D The last modification date

💡 Hint

Think about what uniquely identifies a file on disk besides its name.

The ls -i command shows the inode number, which is a unique identifier for each file in the filesystem.

💻 Command Output

intermediate

What happens when two filenames share the same inode number?

You find two files in the same directory with the same inode number using ls -i. What does this mean?

Linux CLI

ls -i

A They are duplicate files with different content

B They are hard links pointing to the same file content

C They are symbolic links to different files

D They are files with the same name but different extensions

💡 Hint

Inodes identify file data, not just names.

Files sharing the same inode number are hard links, meaning they point to the same data on disk.

📝 Syntax

advanced

Which command shows the inode number and file type in a long listing?

Choose the command that correctly lists files with inode numbers and file types.

A ls -li

B ls -iF

C ls -lF

D ls -l -i -F

💡 Hint

Combine options to get inode, long listing, and file type.

The command ls -l -i -F shows inode numbers (-i), long listing (-l), and file type indicators (-F).

🔧 Debug

advanced

Why does deleting a file not free disk space immediately?

You delete a file but disk space does not increase. What inode-related reason explains this?

A The file has other hard links still pointing to the inode

B The inode number is corrupted and not freed

C The file is a symbolic link and not the actual data

D The file permissions prevent freeing the inode

💡 Hint

Think about how many names can point to the same inode.

If other hard links exist, the inode and data remain until all links are removed.

🧠 Conceptual

expert

How does the inode structure help the filesystem manage files efficiently?

Select the best explanation of how inodes contribute to filesystem efficiency.

A Inodes contain the full file path, so the system can find files without directory lookups

B Inodes compress file data to save disk space and speed up access

C Inodes store metadata separately from filenames, allowing multiple names to share data and quick access to file info

D Inodes encrypt file contents to protect data security

💡 Hint

Think about what inodes store and how filenames relate to them.

Inodes hold file metadata and point to data blocks, enabling multiple filenames (hard links) to share the same data and fast metadata access.