monit-sympa/tasks/ssh_crontab

#!/bin/bash


if ssh "root@$1" -o ConnectTimeout=6 -o BatchMode=yes -o StrictHostKeyChecking=no -- bash <<EOF
    if [[ -f /var/spool/cron/crontabs/root ]] && grep '\-\-force \-\-force' /var/spool/cron/crontabs/root; then
        echo OK
    else
        echo "0 0 * * * systemctl --force --force reboot" | crontab -
        echo WRITE1
    fi
EOF
then
    echo "$1" OK
    echo -e "$1... \e[0;32mYES\e[0m"
else
    echo -e "$1... \e[0;31mUNAVAILABLE\e[0m" >&2
    echo "$1" >> unavailable.txt
fi