How do hard links differ from soft links?

Hard links and soft links (symbolic links) are both ways to reference files in Unix/Linux systems, but they have key differences:

Hard Links:

1. Same Inode:

   • Hard links point directly to the same inode as the original file. They share the same data on disk.

2. File System Limitations:

   • Hard links cannot span different file systems. You can only create hard links within the same partition.

3. Deletion:

   • Deleting one hard link does not remove the data until all links to that inode are deleted. The data remains accessible through other hard links.

4. No Special Indicators:

   • Hard links appear as regular files and do not have any special indicators in their names.

Soft Links (Symbolic Links):

1. Different Inode:

   • Soft links have their own inode and point to the pathname of the original file, not directly to the data.

2. Cross File System:

   • Soft links can span different file systems. You can create a symbolic link to a file located on another partition or disk.

3. Broken Links:

   • If the original file is deleted, the soft link becomes a "broken link" (or dangling link) and will not work.

4. Special Indicators:

   • Soft links are indicated by an l at the beginning of the output when using ls -l, and they show the path to the target file.

Summary:

• Hard Links: Same inode, cannot cross file systems, data remains until all links are deleted.
• Soft Links: Different inode, can cross file systems, become broken if the target is deleted.

If you have more questions or need further clarification, feel free to ask!