EZDevOps_ThinkCentre – Linux HealthCheck Dash Board

Monitor CPU, Memory, Disk, Network, and System Load with visual dashboards, alerts, and detailed reports.

Introduction to Linux HealthCheck

Linux HealthCheck is the backbone of reliable DevOps operations. By continuously monitoring CPU, memory, disk, network, and system load, administrators can proactively prevent outages, optimize performance, and maintain service reliability. A well-structured health check also ensures compliance, security, and long-term stability of DevOps platforms.

The report attached below is a sample Linux HealthCheck dashboard report for Linux hosting the EZDevOps DevOps platform. It demonstrates real-world monitoring practices including alerts, automated checks, historical trends, and optimization tips.

Linux HealthCheck

Monitor CPU, Memory, Disk usage, and system logs efficiently.

Check CPU with top or htop
Monitor disk space with df -h
Review logs using journalctl

CPU Monitoring & Analysis

CPU utilization is critical for server performance. Monitor per-core usage to identify bottlenecks and optimize scheduling.

top or htop to view live CPU usage.
mpstat -P ALL 5 to see per-core utilization every 5 seconds.
Watch for consistently high load averages exceeding CPU core count.
Identify CPU-intensive processes: ps aux --sort=-%cpu

Memory & Swap Monitoring

Check memory usage: free -h, vmstat 5
Detect memory leaks by monitoring top or smem over time
Monitor swap usage and avoid excessive swapping which degrades performance
Optimize caching and buffer usage for better memory efficiency

Disk Space & I/O Monitoring

Check disk usage: df -h, du -sh /path
Monitor read/write operations: iostat -x 5, iotop
Watch for inode exhaustion and ensure sufficient free space
Optimize logs and temp files to reduce disk usage

Network Monitoring & Troubleshooting

Monitor interfaces: ifconfig or ip addr
Check active connections: netstat -tulnp, ss -tulnp
Measure latency: ping, mtr
Monitor bandwidth: iftop, nload
Log suspicious traffic or unexpected connections

Service & Process HealthCheck

List processes by resource usage: ps aux --sort=-%cpu, ps aux --sort=-%mem
Check service status: systemctl status nginx, systemctl is-active sshd
Restart failing services automatically using scripts or cron
Monitor background jobs and CI/CD tasks for performance issues

Log Monitoring & Auditing

Check system logs: /var/log/syslog, /var/log/messages
Monitor authentication: /var/log/auth.log
Use journalctl for centralized log review
Automate parsing logs for errors and alerts using scripts

Security Checks & Compliance

Verify firewall status: sudo ufw status or iptables -L
Check SELinux/AppArmor modes and alerts
Scan for vulnerable packages: apt list --upgradable or yum check-update
Ensure correct file permissions and ownership on critical directories
Monitor failed login attempts and SSH brute-force attempts

Automation & Scheduled HealthChecks

Create cron jobs for automated health checks
Example: */5 * * * * /usr/local/bin/linux_healthcheck.sh
Generate daily HTML reports for review
Send alerts via email, Slack, or webhooks when thresholds are exceeded

Performance Optimization Tips

Limit resource-hogging processes using nice and renice
Enable caching for frequently used services
Use swap efficiently and avoid overcommit
Regularly archive logs and clean temp directories
Monitor trends and scale resources proactively

Sample HealthCheck Dashboard Report

Below is a sample Linux HealthCheck dashboard report for Linux servers hosting the EZDevOps DevOps platform. It demonstrates real-time monitoring of CPU, memory, disk, network, services, and automated alerts for proactive management.