Which syslog severity level must be set to capture informational messages?

The 'debug' severity level (level 7) captures the most detailed messages, including informational messages, and is used for troubleshooting. The syslog severity levels are numbered 0-7, with 0 being the most critical (emergencies) and 7 being the least critical (debugging). 'Alert' (level 1) indicates conditions that require immediate action. 'Critical' (level 2) signifies critical conditions. 'Notice' (level 5) indicates normal but significant conditions, which are less detailed than informational or debug messages. To ensure all informational messages are captured, including those that might be considered less severe than a 'notice,' 'debug' is the appropriate setting.