wget --no-check-certificate https://raw.githubusercontent.com/Huiaini/cloudflare-api-v4-ddns/master/cf-v4-ddns.sh
chmod +x cf-v4-ddns.sh
vim cf-v4-ddns.sh
API key, see https://www.cloudflare.com/a/account/my-account
CFKEY= (Cloudflare 账号KEY)
Username, eg: user@example.com
CFUSER=(Cloudflare 邮箱)
Zone name, eg: example.com
CFZONE_NAME=(Cloudflare 主域名)
Hostname to update, eg: homeserver.example.com
CFRECORD_NAME=(Cloudflare 二级域名)
bash cf-v4-ddns.sh
echo '*/5 * * * * bash /root/cf-v4-ddns.sh' >>/var/spool/cron/root
FORCE=true