Which command contains a typo when referring to RSYNC?

The command that contains a typo when referring to RSYNC is "rysnc." This is because RSYNC is a specific command used for synchronizing files and directories between two locations, and it is always spelled as "rsync."

The other options, "rsync," "copy," and "tar," are legitimate commands in Linux. "rsync" is used for syncing files efficiently, "copy" is a command generally associated with copying files (although it is more common in Windows than Linux), and "tar" is a command for compressing and archiving files. Since the focus is on accurately referencing the rsync command, it is clear that "rysnc" deviates from the correct spelling, making it the choice that contains the typo.