Reboot server on connectivity loss

auto_reboot.sh

#!/bin/bash

[ "$UID" -eq 0 ] || exec sudo bash "$0" "$@"

((count = 10))                           # Maximum number to try.

autoreboot_log="/var/log/autoreboot.log"

echo $(date -u) "Current time: $(date)" >> "$autoreboot_log"

while [[ $count -ne 0 ]] ; do
    /usr/bin/ping -c 1 1.1.1.1 >> "$autoreboot_log" 2>&1
    rc=$?

    if [[ $rc -eq 0 ]] ; then
        echo $(date -u) "Connectivity present, exiting" >> "$autoreboot_log"
        ((count = 1))                    # If okay, flag loop exit.
    else
        echo $(date -u) "Retrying $count" >> "$autoreboot_log"
        sleep 10                          # Minimise network storm.
    fi
    ((count = count - 1))                # So we don't go forever.
done

if [[ $rc -eq 1 ]] ; then
	echo $(date -u) "No connectivity, rebooting" >> "$autoreboot_log"
	echo $(date -u) "-------------------------------------------" >> "$autoreboot_log"
	/usr/bin/systemctl start reboot.target
else
	echo $(date -u) "-------------------------------------------" >> "$autoreboot_log"
fi
exit $rc