Linux

Fix DRBD 'Not Defined in Your Config' Error

A quick fix for the DRBD error “not defined in your config (for this host)”, typically caused by a hostname mismatch in your …

drbd linux centos

Install PostgreSQL on CentOS 6

CentOS PostgreSQL Installation tutorial CentOS PostgreSQL centos postgresql : PostgreSQL is a powerful, open source object-relational …

centos postgresql linux

Linux ACL Permissions Guide

Overview A guide to using Access Control Lists (ACL) on Linux to manage fine-grained file and directory permissions beyond the standard …

linux security

Test Firewall Rules with Netcat

Overview How to use netcat (nc) to test firewall rules by setting up a listener on one side and connecting from the other, verifying that …

linux networking

Understanding chmod, SUID, SGID, and Sticky Bit

Overview Linux chmod has a few options that can make your life a lot easier when managing a shared storage. The most needed are chmod suid …

linux security

Install and Configure xrdp on CentOS

Overview xrdp is a free open-source remote desktop server for Linux. Installing xrdp on CentOS might be a little tricky since CentOS …

centos linux remote-desktop

Install LuaJIT on CentOS

centos luajit installation instructions centos luajit centos luajit installation instructions - In the following tutorial I will show you …

centos lua luajit

Set the Date Manually on DD-WRT

dd-wrt set date manually dd-wrt set date manually - In this tutorial I’ll explain how to set the date and time in dd-wrt based …

dd-wrt linux

Install G-WAN Web Server on CentOS

CentOS G-WAN Server How to install and configure the G-WAN web server on CentOS, including service mode setup and support for multiple …

centos g-wan web-server

iptables Examples and Rules for CentOS

Overview Essential iptables configuration examples for CentOS, including setting up default chain policies, stateful rules, and common …

centos firewall linux

Fix SSL Key Usage Violation Error on CentOS

How to fix the “SSL handshake failed: Key usage violation in certificate has been detected” error on CentOS, commonly caused by …

centos ssl svn

tr vs sed: String Manipulation in Linux

Overview tr and sed are very powerful stream and character manipulation commands, Each has its own advantage with string manipulation.

bash linux

Install RPMForge Repository on CentOS 6

CentOS RPMForge Installation Instructions (for Centos 6.x) A quick guide to adding the RPMForge (RepoForge) third-party repository to your …

centos git rpmforge

Linux fg and bg Commands: Usage and Examples

Overview Linux fg bg commands usage and examples using CTRL-Z and jobs command. Move a process between background and foreground modes with …

bash linux

Copy Your SSH Public Key to a Remote Server

A quick guide to copying your SSH public key to a remote server using ssh-copy-id or scp.

linux ssh