Server Monitoring Guides & Tutorials — page 8

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

Check Disk Quota Usage on Linux: quota and repquota

Check system resource quota usage on Linux servers. Monitor quota limits, track quota usage, detect quota exhaustion, and set up automated quota monitoring with Zuzia.app.

Check Available Security Updates: apt and yum

Step-by-step guide to verify if system updates are available on your Linux server. Ensure your system is up to date with security patches and bug fixes.

Find Top CPU-Consuming Processes: ps, top & htop

Check top CPU-consuming processes on Linux servers. Quickly identify processes causing performance bottlenecks during incidents.

Find UID 0 (Root-Equivalent) Users on Linux

Quick guide to verify that only the root account has UID 0 on your Linux server. Audit user privileges to detect unauthorized root-level access.

Check Memory Usage per User on Linux with ps

Step-by-step guide to check memory usage grouped by users on your Linux server to identify which users are consuming the most resources.

Find Which User Runs the Most Processes on Linux

Set up continuous monitoring to identify which user is running the most processes on your Linux server to monitor resource usage and detect potential issues.

Check VM Performance on Linux: virsh, iostat, mpstat

Check virtual machine performance on Linux servers. Monitor VM CPU, memory, disk I/O, network performance. Setup monitoring with Zuzia.app.

How to Check Vulnerability Scan Results on Linux

Check vulnerability scan results on Linux servers. Monitor vulnerability findings, track severity, detect new vulnerabilities. Setup monitoring with Zuzia.app.

Web Server 4xx and 5xx Error Rate: Measure from Logs

Step-by-step guide to check web server error rates for 4xx and 5xx HTTP status codes. Monitor error rates, detect issues, and ensure reliable web service delivery.

How to Check Zombie Processes in Linux with ps and top

Quick guide to identify zombie processes on your Linux server to detect process management issues and maintain system stability.

Cloud Resource Exhaustion and Cost Spikes: Troubleshooting

Cloud resources exhausted, costs spiraling? Quick steps to identify resource hogs, stop cost bleeding, and optimize cloud spending within minutes.

Configuration Drift Causing Outages: Detect and Fix

Configuration drift causing service problems? Quick steps to identify configuration changes, restore correct configuration, and fix service issues.

Container Image Audit: What to Check and How to Automate

Audit container images: base image age, known vulnerabilities, secrets and user settings - and how to automate the audit in CI.

Cron Heartbeat Monitoring: The Reliable Way to Verify Jobs

Learn how cron heartbeat monitoring detects missed jobs, reduces false alerts, and verifies scheduled work with practical production settings and checks.

Cron Jobs Not Executing: Causes and Fixes

Cron jobs not executing? Quick steps to identify execution issues, fix cron configuration, and restore scheduled task functionality.

Data Retention Policy Violations: Find and Fix Them

Data retention policy violated right now? Quick steps to assess violations, ensure compliance, clean up data, and prevent policy breaches within minutes.

Database Connection Timeout Errors: MySQL & PostgreSQL Fixes

Database connections timing out? Quick steps to identify the cause, fix connection pool issues, and restore database connectivity within minutes.

Disk I/O Optimization: Find and Fix Slow Storage

Find what makes storage slow and fix it: I/O schedulers, filesystem options, caching and the metrics that prove the change helped.

Disk Performance Monitoring: Latency, IOPS & Bottlenecks

Monitor disk performance that matters: latency, IOPS, queue depth and utilization - with thresholds that catch real bottlenecks.

Disk Full on Linux Server: Free Up Space Fast

Server at 100% disk? Quick commands to free space immediately. Clear logs, find large files, remove old packages, and restore functionality fast.

Disk Space Slowly Running Out: Long-Term Fixes

Disk filling up over weeks? Implement automated cleanup, log rotation, retention policies, and capacity planning to prevent future disk emergencies.

DNS Resolution Failures & Timeouts: Troubleshooting with dig

Troubleshooting guide for DNS resolution failures and timeout errors. Learn how to diagnose DNS issues, identify root causes, and fix DNS resolution problems.

Docker Container Keeps Restarting? Find the Cause and Fix It

Container stuck in Restarting? Read the exit code and the last logs, check for OOM kills, pause the restart policy to debug, fix the cause and get alerted the next time it loops.

Docker Container Status Explained: Up, Exited, Restarting

Learn how to interpret docker container status, reduce false alerts, choose the right checks, and build reliable uptime monitoring.