zfs:tldr:0255c

This command creates a snapshot of a ZFS file system within a ZFS storage pool.

Here is the breakdown of the command:

• zfs snapshot: This is the command itself, used to create a ZFS snapshot.
• ${pool_name-filesystem_name}: This is a placeholder that should be replaced with the name of the ZFS storage pool and the specific file system within the pool that you want to create a snapshot of. For example, if your ZFS storage pool is named "my_pool" and you want to snapshot the file system called "my_files", you would replace this placeholder with my_pool-my_files.
• @: This is a separator used to indicate that what follows is the name of the snapshot.
• ${snapshot_name}: This is a placeholder that should be replaced with the desired name for the snapshot. Choose a name that helps you identify the snapshot easily, such as a timestamp or a meaningful description.

So, when you execute this command with the appropriate values, it will create a snapshot of the specified ZFS file system within the given ZFS storage pool, using the provided snapshot name.