No, hard links cannot span file systems. Hard links must reside within the same file system as the original file. This is because hard links reference the same inode, which is specific to a particular file system.
If you need to link files across different file systems, you would use symbolic links (symlinks) instead. Symlinks can point to files or directories on different file systems and are more flexible in that regard.
If you have any more questions or need further clarification, feel free to ask!
