🛠️ Ubuntu System Maintenance Guide

A practical guide for checking and maintaining your Ubuntu system.
Includes disk health checks, file system verification, cache/RAM cleaning, and performance optimization.

🔎 1. Check Hard Disk (SMART Test)

Install smartmontools and check disk health:

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sudo apt update && sudo apt install smartmontools -y
sudo smartctl -a /dev/sda
sudo smartctl -t long /dev/sda

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🔧 2. Check File System

Run fsck on the root partition (replace sda1 with your actual partition):

sudo fsck -f /dev/sda1

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🧹 3. Clean the System

Remove unnecessary packages and clean cache:

sudo apt autoremove -y
sudo apt autoclean
sudo apt clean

Clean system logs older than 7 days:

sudo journalctl --vacuum-time=7d

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🧠 4. Free RAM

Clear memory cache without removing files:

sudo sync; sudo sysctl -w vm.drop_caches=3

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🚀 5. Improve Performance

Update the system:

sudo apt update && sudo apt upgrade -y

Monitor resource usage:

htop

Disable an unnecessary service:

sudo systemctl disable service_name

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