mkdir -p /root/system/script
touch /root/system/script/ntpmonitor.sh

vi /root/system/script/ntpmonitor.sh


chmod +x root /root/system/script/ntpmonitor.sh

(crontab -l 2>/dev/null; echo "#####NTP monitoring#####") | crontab -
(crontab -l 2>/dev/null; echo "30 11 * * * /root/system/script/ntpmonitor.sh") | crontab -



systemctl restart crond

crontab -l


/root/system/script/ntpmonitor.sh







rm /root/system/script/ntpmonitor.sh



touch /root/system/script/ntpmonitor.sh
chmod +x /root/system/script/ntpmonitor.sh

vi /root/system/script/ntpmonitor.sh