When running `free -h` on a Linux system, you may notice the buff/cache entry consuming over a gigabyte, leaving little memory for applications; this article explains that the cache is built from file I/O, shows how to manually drop it via `/proc/sys/vm/drop_caches`, and provides a cron‑based script to automate the cleanup.
This article explains how to package a Spring Boot application using Maven profiles, generate a zip bundle with the assembly plugin, and deploy it on Linux with a reusable shell script that can start, stop, restart, or unzip the service, eliminating manual configuration for each environment.
This article provides a complete Bash script that gathers Linux system metrics—including IP address, CPU core count, utilization percentages, load averages, memory and swap usage, and disk I/O statistics—while explaining each command (ifconfig, grep, awk, top, vmstat, free, iostat, uptime) and how the script assembles the results.
A Linux crontab job that should run a monitoring script only when a process is absent repeatedly launches the process because the cron environment lacks the proper PATH, causing pidof to fail silently and always return zero.
An investigation reveals that a cron‑scheduled script repeatedly launches a process because the limited PATH in cron’s environment prevents the pidof command from running, causing the script to misinterpret the process count as zero, and the fix is to set the correct PATH.
This guide walks you through creating a blockip.conf file, integrating it into Nginx, using AWK to detect IPs with over 60 requests per minute, writing a shell script to generate deny rules, and scheduling the process with cron for automatic IP blocking.
Learn quick Bash commands and scripts to extract a server's IP address—using awk, grep, sed, or a custom shell script—to retrieve a single interface IP or list all network interfaces, complete with example outputs for typical Linux environments.
This article provides a complete Bash script that performs daily health checks on a Linux host, gathering information on disk usage, memory, CPU, processes, services, network configuration, user accounts, password policies, firewall, SELinux, NTP, SNMP, JDK, and more, then formats the results into a report and emails it.
This guide shows how to check existing swap space, then use two lightweight shell scripts to automatically create, mount, and later remove a swap file on Linux, including code examples, permission steps, and verification commands.
