Soft vs Hard Links

Definition

Methods of creating shortcuts to files in Linux. A Soft Link (symlink) points to a file's name. A Hard Link points directly to the file's underlying inode.

Explain Like I'm New

Soft Link: A desktop shortcut. If you delete the original file, the shortcut breaks. Hard Link: Giving a file two different names. If you delete the first name, the data is perfectly safe under the second name.

Real World Example

You use `ln -s /var/www/html /home/bob/website` to create a Soft Link. Bob can now easily edit the website from his home folder. If someone deletes the `/var/www/html` folder, Bob's link turns red and says 'Broken'.

Common Use Cases

•Organizing configurations
•Managing multiple version installations (e.g., python -> python3.9)

Interview Questions

basic

Which type of link can point to a directory (folder): Soft Links or Hard Links?

intermediate

If you create a Hard Link to a 1GB file, does it consume 2GB of hard drive space total?

Flash Cards

Question

Point to directory?

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Answer

Only Soft Links (symlinks) can point to directories. Hard linking directories is forbidden by the OS to prevent infinite recursive loops.

Question

Does it double the space?

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Answer

No. It still only takes 1GB. A Hard Link simply creates a second 'name' that points to the exact same physical data (inode) on the disk. It doesn't duplicate the data.