Server Monitor

Collectd
- Configure Collectd as a Central Monitoring Server for Clients
- How to Install and Configure ‘Collectd’ and ‘Collectd-Web’ to Monitor Server Resources in Linux
Checkmk
- Using Checkmk for Monitoring Your Linux Server Infrastructure
Healthchecks - Healthchecks is a cron job monitoring service. It listens for HTTP requests and email messages ("pings") from your cron jobs and scheduled tasks ("checks"). When a ping does not arrive on time, Healthchecks sends out alerts. 可監控 Cron job，排程時間到若沒有正常執行，也可以收到告警。可以整合任何程式碼或 script 以 HTTP API 方式觸發告警。可以監控某個程式的執行時間是否過長。
Netdata - Monitor your servers, containers, and applications, in high-resolution and in real-time.
- How to Monitor Performance Of CentOS 8/7 Server Using Netdata (tecmint.com)
Beszel 是一個輕量級的伺服器監控平台，包含 Docker 統計資訊、歷史數據和告警功能。
- This free and open-source lightweight server monitor changed how I keep an eye on my home lab

Uptime Kuma
- How I use Uptime Kuma to monitor my self-hosted services (and get notifications if they go down)
NEMS Linux: NEMS is the Nagios Enterprise Monitoring Server for Single Board Computers
- [Video] NEMS Linux 1.4.1 - The FREE Nagios Enterprise Monitoring Server
Gatus: Gatus is a developer-oriented health dashboard that gives you the ability to monitor your services using HTTP, ICMP, TCP, and even DNS queries as well as evaluate the result of said queries by using a list of conditions on values like the status code, the response time, the certificate expiration, the body and many others. The icing on top is that each of these health checks can be paired with alerting via Slack, Teams, PagerDuty, Discord, Twilio and many more. 支援 Line 告警
BlueWave Uptime
OneUptime: OneUptime helps you handle incidents, set up on-call rotations, run tests, secure your services, analyze logs, track performance, and debug errors.
- GitHub: https://github.com/OneUptime/oneuptime
CoolMonitor
CheckCle: Open-source monitoring platform offering real-time insights into server and service health, incident management, and operational transparency.
- GitHub: https://github.com/operacle/checkcle