Server Monitoring Guides & Tutorials — page 9
Practical playbooks for sysadmins, freelancers and small agencies running client servers: Linux metrics, uptime and SSL checks, cron and scheduled tasks, Docker, databases, alerting and incident response.
Articles
Domain Expiration Monitoring: Setup and Renewal Alerts
Learn how domain expiration monitoring works, what to configure, how to avoid false alarms, and how it fits with uptime, SSL, DNS, and incident monitoring.
Email Delivery Failures & SMTP Errors: Troubleshooting
Troubleshooting guide for email delivery failures and SMTP errors. Learn how to diagnose email issues, identify root causes, and fix SMTP delivery problems.
Email Notifications in Zuzia: Setup and Best Practices
Configure email notifications in Zuzia.app to receive alerts for server issues and website downtime. Setup email addresses, configure alert rules, and test delivery.
Email and SMS Alerts for Server Monitoring
Expert guide to configuring email sms alerts for uptime monitoring. Learn to reduce MTTR with sms voice call redundancy and proactive notification systems.
Essential Server Health Checks for Production Servers
Master essential server health checks to prevent downtime. Expert guide on CPU, memory, disk, and network monitoring for sysadmins and DevOps teams.
SSL Certificate Expired: Emergency Fix with certbot
Website showing security warnings? Users blocked? Get your SSL certificate renewed and working again with these immediate steps.
Exposed Database Port: Close It with bind-address & Firewall
Fix exposed database port security risks on Linux servers. Detect exposed MySQL and PostgreSQL ports, prevent unauthorized access, secure database connections.
fail2ban-client -t: Test Fail2Ban Configuration Safely
Use fail2ban-client -t to validate Fail2Ban configuration before a restart, read its errors and avoid locking yourself out.
Filesystem Corruption: fsck and xfs_repair Recovery Steps
Filesystem corruption detected right now? Quick steps to assess damage, prevent further data loss, and recover data within minutes.
Find Files Larger Than X on Linux: find -size & du
Commands to find all files larger than a specific size (100MB, 500MB, 1GB). Quickly identify what's consuming disk space across the entire server.
Find the Largest Files in a Directory on Linux
Search for large files within a specific directory like /var/log, /home, or /var/lib. Targeted commands for investigating particular folders.
Firewall Configuration Audit Tools: How to Choose One
What a firewall configuration audit tool should check, how to compare options and how to run audits on a schedule.
Firewall Configuration Audit: Checklist and Common Mistakes
Firewall configuration audit checklist: rule review, default policies, logging, exposed services and the mistakes that leave ports open.
Firewall Blocking Legitimate Traffic: Find the Rule
Firewall rules blocking legitimate traffic? Quick steps to identify blocking rules, verify firewall configuration, and restore network access.
Firewall Security Audit: Scope, Checks and Reporting
Learn how to run a firewall security audit for uptime and monitoring teams, with practical checks, false-positive control, and production-ready settings.
Free RAID Monitoring Tools for Linux: mdadm, smartd & More
Which free tool monitors your RAID: mdadm --monitor for software RAID, storcli/perccli/ssacli for hardware controllers, zed for ZFS, smartd for the disks - and how to get alerts from each.
Free Uptime Monitoring in Europe: EU Probes, GDPR & Limits
What to check before picking a free uptime monitor for European sites: probe locations in the EU, where check data is stored, DPA and sub-processors, interval and alert limits.
Free Windows Server Uptime Monitor: Options and Setup
Monitor Windows Server uptime for free: ping, RDP and service port checks, HTTP endpoints and alerting options.
Frequent Website Checks: How Often Should You Monitor?
Expert guide on frequent website checks for uptime monitoring. Learn to configure intervals, reduce false positives, and ensure 99.9% availability for SaaS.
Health Check Best Practices: Endpoints, Timeouts, Alerts
Practical health check best practices for uptime teams: endpoints, thresholds, retries, multi-location checks, alert tuning, and false-positive control.
High CPU Usage on a Linux Server: Diagnose and Fix
Server at 100% CPU right now? Quick steps to identify the offending process, kill if necessary, and restore performance within minutes.
High Disk I/O on Linux: Find the Cause and Fix It
Are you experiencing slow application performance due to high disk I/O causing timeouts and system responsiveness issues.
High Memory Usage on a Linux Server: Diagnose and Fix
Server swapping heavily, applications slow? Quick steps to identify which process is consuming all memory and restore server responsiveness.
Audit All Users' Cron Jobs for Security
During a security audit or incident response, list every cron job for every user on your Linux server. Find hidden backdoors and unauthorized scheduled tasks.