Freaks City

The vmstat command is a powerful, cross-platform utility for monitoring system performance on Linux and Unix systems. It provides a real-time snapshot of key metrics including CPU utilization, memory usage, swap activity, and I/O operations—all in a single, concise output. Unlike top, which focuses on per-process resource consumption, vmstat gi ...

df Displays disk space usage across all mounted filesystems. df -h The -h flag presents sizes in a human-readable format (KB, MB, GB). free Shows total, used, and free memory (RAM) along with swap usage. free -m The -m option displays values in megabytes. Swap space acts as virtual memory—when physical RAM is exhausted, the system borrows dis ...

Understanding the /proc Virtual File System The /proc directory serves as a virtual file system in Linux that provides access to kernel and process information through file-like interfaces. This system acts as a window into the kernel's data structures, allowing users and applications to retrieve system information without making direct system ...

CPU Utilization Threshold Alert Monitor processor load and trigger a notification when usage exceeds a defined limit. This implementation calculates active CPU time by subtracting the idle percentage reported by top. #!/usr/bin/env bash ALERT_LIMIT=75 CURRENT_LOAD=$(top -bn1 | awk '/^%Cpu/ {print 100 - $8}') if awk "BEGIN {exit !($CURR ...