vi /etc/systemd/system/backup.service

[Unit]
Description=Backup Files
After=local-fs.target

[Service]
Type=oneshot
User=root
Group=root
ExecStart=/bin/bash -c "/usr/bin/rsync -av /home/mysql233/ /mnt/raid10/mysql/ && /usr/bin/rsync -av /home/yangguang233/ /mnt/raid10/yangguang/"
ExecStartPost=/bin/rm -f /etc/systemd/system/backup.service

[Install]
WantedBy=multi-user.target

systemctl daemon-reload

systemctl enable backup.service