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Using Linux Systems

Guides to configuring and administering servers running Linux.

Improving Website Performance: Moving MySQL to tmpfs

Other Possible Issues

Checking File System Integrity

Running Out of Inodes

Processes Terminated by OOM Killer

Monitoring Load and Processes: top, htop, atop

Disk Device Information: df, lsblk, parted, fdisk

Analyzing Disk Space Usage: ncdu, du

Troubleshooting Database Problems

Basic Troubleshooting When Your Website Has Problems

Creating and Deploying a Disk Image with the dd Utility

Preparing an Image for Deploying a Cloud Server

Running a Bot in the Background

Installing an SSL Certificate on a Keitaro Server

Configuring the iRedMail Mail Server

Installing the iRedMail Mail Server

Installing and Configuring PostgreSQL

Setting Up the QEMU Agent

Remote Connection to MySQL

OpenVPN Configuration

Configuring the iptables Firewall

Installing the XFCE Desktop Environment on Ubuntu

Installing and Removing Software: Working with Package Managers

Setting Up and Resizing the Swap Space

Changing the Disk Size

Adding and Removing Disks

Configuring a Static IP Address

Adding an Additional IP Address

Auditing System Events

System Logging with systemd

Managing Services in systemd

Scanning with ClamAV

Optimizing MySQL with MySQLTuner

Setting Up FTP on Ubuntu 20.04

Setting Up Redirects (Nginx)

Configuring Redirect Rules

Configuring PHP on Debian and Ubuntu

Configuring PHP Settings (CentOS)

Installing PHP Modules on Debian and Ubuntu

Installing Additional PHP Modules on CentOS

Installing an SSL Certificate in Nginx

Installing phpMyAdmin on a LAMP Stack on Ubuntu

Setting Up LAMP on Ubuntu

Backing Up and Restoring a Database

Protecting SSH from Password Brute-Force Attacks with Fail2ban

Managing Access and Permissions

Creating New Users

Changing the MySQL Root Password

Changing or Resetting the root Password

Connecting with an SSH Key

Working with a Server via SFTP (SSH File Transfer Protocol)

Connecting to a Server via SSH

Protecting SSH from Password Brute-Force Attacks with Fail2ban

How to Build the Latest Git from Source

Keeping ebtables Rules After a Reboot

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