What is the purpose of the 'ln' command in Linux?

• A. Create a symbol link or hard link to a file
• B. Display the user's groups
• C. Remove duplicate lines
• D. Change a user's password

Answer: (A)

The 'ln' command in Linux is primarily used to create links between files, which can be either hard links or symbolic (or soft) links. Hard links allow multiple directory entries to refer to the same file on disk, effectively giving multiple names to the same data. Symbolic links are special files that point to another file or directory, allowing users to create shortcuts that can reference files located in different directories or storage locations.

Creating links is essential for file management in Linux, as it allows better organization, efficient storage, and easier access to files without duplicating them on disk. For instance, when a symbolic link is created, changes to the target file are reflected in the link without needing to manage multiple copies of the same file.

The other choices do not pertain to the functionality of the 'ln' command. While displaying user groups, removing duplicate lines, and changing passwords are all tasks managed by different commands in Linux, they are not related to the purpose of 'ln'.