receiving broadcast message on ec2

Hi,

To prevent the immediate shutdown, you can try canceling the shutdown command (if it's scheduled with a shutdown command) by executing shutdown -c as root. However, this is a temporary fix and might not work if the shutdown is triggered by another method. To figure out why this is happening, please check below:

Since you have created this instance from a snapshot, the original instance (from which the snapshot was taken) might have had custom scripts that trigger a shutdown under certain conditions. These scripts could still be active in the new instance created from the AMI.

Check for any cron jobs that might be scheduled to shut down the system. Inspect the cron jobs for the root user and other users by checking /var/spool/cron/crontabs/ and /etc/cron.* directories.

• Use crontab -l for the root user and other suspicious users to list cron jobs.
• Check system-wide cron directories: /etc/cron.d/, /etc/cron.daily/, /etc/cron.hourly/, etc

Review Logs:

• Check /var/log/syslog (or /var/log/messages on some Linux distributions) for any messages related to the shutdown.
• Look into the logs mentioned above for cloud-init

Hope this helps.