The differences between symbolic links (symlinks) and hard links are as follows:
1. Inode Association:
- Hard Link: Shares the same inode as the original file, meaning both the original file and the hard link point to the same data on the disk.
- Symbolic Link: Has its own inode and points to the pathname of the original file, not the data itself.
2. Linking to Directories:
- Hard Link: Cannot link to directories (with some exceptions in certain filesystems) to prevent circular references.
- Symbolic Link: Can link to directories, allowing for more flexible navigation.
3. Cross Filesystem Linking:
- Hard Link: Cannot cross filesystem boundaries; both the original file and the hard link must reside on the same filesystem.
- Symbolic Link: Can link to files or directories across different filesystems.
4. Behavior on Deletion:
- Hard Link: Remains functional even if the original file is deleted or moved, as the data still exists on disk.
- Symbolic Link: Becomes broken if the target file is deleted or moved, as it points to a non-existent path.
5. Usage:
- Hard Link: Typically used for creating multiple names for the same file.
- Symbolic Link: Often used for shortcuts or references to files and directories, making it easier to access them.
Summary:
- Hard links are direct references to the same data and are more permanent, while symbolic links are pointers to a pathname and can become invalid if the target is moved or deleted.
