Reboot Checker#

Detect unexpected reboots and track boot history. Useful for security monitoring — flags when a system restarts unexpectedly.

Quick Start#

bash

# Check for unexpected reboot (run at startup or on first heartbeat)
bash {baseDir}/scripts/check-reboot.sh

# View boot history
bash {baseDir}/scripts/check-reboot.sh --history

# Reset state (mark current boot as known)
bash {baseDir}/scripts/check-reboot.sh --reset

How It Works#

1. On first run, records current boot time to state file
2. On subsequent runs, compares current boot time with last known
3. If boot time changed unexpectedly → alerts
4. State file: ~/.reboot-check-state (customizable with --state)

Output#

text

STATUS: CLEAN       — No reboot since last check
STATUS: REBOOTED    — System rebooted since last check
STATUS: FIRST_RUN   — First time running, recording boot time

Integration#

Use with cron or heartbeat systems:

bash

# Cron: check every hour
0 * * * * /path/to/check-reboot.sh >> /var/log/reboot-check.log

# Or in a heartbeat script
RESULT=$(bash check-reboot.sh)
[[ "$RESULT" == *"REBOOTED"* ]] && echo "ALERT: Unexpected reboot!"

Options#

• --state FILE — State file path (default: ~/.reboot-check-state)
• --history — Show recorded boot history
• --reset — Reset state to current boot
• --json — Output as JSON