Running Linux updates

SUU uses the DUP to update the various system components. During a Linux update, the DUP creates the .spsetup file using the Linux lockfile utility at /var/lock. This file is created when one of the following situations occur:

• A kernel panic
• A system restart command during a DUP procedure, preventing a TERM signal from interrupting or stopping a running process

If one of these conditions occur, a /var/lock/.spsetup file is created, causing SUU to report a successful update and prompt the user to restart the system. When you run SUU again and run the Comparison Report, the comparison procedure reports no change in device status. If this situation occurs and if you are not running an update, delete the /var/lock/.spsetup file.