How to use the command `swaplabel` (with examples)

The swaplabel command allows users to print or change the label or UUID of a swap area. It is important to note that path/to/file can point to either a regular file or a swap partition. This command can be useful in managing and identifying specific swap areas.

Use case 1: Display the current label and UUID of a swap area

Code:

swaplabel path/to/file

Motivation: By using this command, users can easily retrieve the label and Universally Unique Identifier (UUID) of a swap area. This can be useful for identifying the specific swap area in scenarios involving multiple swap areas.

Explanation:

• swaplabel: The command itself.
• path/to/file: The path to the swap area file or partition.

Example output:

LABEL=SWAP-sda5
UUID=70929a16-4c24-43d7-a357-a996e6ec222e

Use case 2: Set the label of a swap area

Code:

swaplabel --label new_label path/to/file

Motivation: Modifying the label of a swap area can be beneficial for organizational purposes or to provide more descriptive information about the swap area.

Explanation:

• swaplabel: The command itself.
• --label new_label: The --label flag followed by the desired new label for the swap area.
• path/to/file: The path to the swap area file or partition.

Example output: No output is displayed upon successfully setting the new label.

Use case 3: Set the UUID of a swap area

Code:

swaplabel --uuid new_uuid path/to/file

Motivation: Assigning a specific UUID to a swap area can be advantageous for easily distinguishing it from other swap areas or for maintaining consistency across systems.

Explanation:

• swaplabel: The command itself.
• --uuid new_uuid: The --uuid flag followed by the desired new UUID for the swap area.
• path/to/file: The path to the swap area file or partition.

Example output: No output is displayed upon successfully setting the new UUID.

Conclusion:

The swaplabel command provides a convenient way to manage and identify swap areas. Whether it is displaying the current label and UUID, setting a new label, or assigning a UUID, this command offers flexibility and control for swap area management. By leveraging the different use cases, users can effectively handle their swap areas according to their needs.