Reset Root MySQL password on Wamp server

Thank to In case you forgot the root password XXXXX your MySQL database server running under Microsoft Windows, you can still access your database and even reset your password XXXXX the command prompt. However, first you should check your my.cnf file where your password XXXXX XXXXX If you are using a new version of MySQL […]

Rights Protected Folder Explorer

Thank to Better detail video thank to Windows Server 2012 Advanced Configuring AD RMS Published: November 11, 2011 Updated: June 21, 2012 Applies To: Windows 7, Windows Server 2008, Windows Server 2008 R2, Windows Vista Rights Protected Folder Explorer allows you to work with Rights Protected Folders. A Rights Protected Folder is similar […]

Active Directory Rights Management Services Overview

Thank to Published: February 8, 2012 Updated: February 8, 2012 Applies To: Windows Server 2012 This document provides an overview of Active Directory Rights Management Services (AD RMS) in Windows Server® 2012. AD RMS is the server role that provides you with management and development tools that work with industry security technologies—including encryption, certificates, and authentication—to help organizations […]


Thanks to SSL/TLS vs STARTTLS There’s often quite a bit of confusion about the different terms SSL vs TLS vs STARTTLS. SSL and TLS both provide a way to encrypt a communication channel between two computers (e.g. your computer and our server). TLS is the successor to SSL and the terms SSL and TLS are used […]

Creating a Mail Server on Ubuntu (Postfix, Courier, SSL/TLS, SpamAssassin, ClamAV, Amavis)

Thanks to Once again, credit where credit due: Thanks again to Ivar Abrahamsen for his guide which is, by far, one of the best ones out there. This guide is intended to be a reference for setting up a server quickly. For that reason, I have intentionally omitted information which explains each step. Please feel free to […]

Add a User to a Group (or Second Group) on Linux

Thanks to Changing the group a user is associated to is a fairly easy task, but not everybody knows the commands, especially to add a user to a secondary group. We’ll walk through all the scenarios for you. Add a New Group To add a new group, all you need to do is use the […]

Postfix VirtualMailBox Clam Smtp Howto

Thanks Introduction In this setup is for a small to medium sized email server with Postfix virtual mailboxes which can be used for multiple domains and non-Linux accounts. If you are new to Postfix please read PostfixBasicSetupHowto to understand the basics before proceeding with this Howto. Also, information is presented about integration with ClamSMTP (an SMTP filter […]


Thank to Mr Le Cuong: Khi tính toán IP, chia subnet thì chúng ta thường áp dụng công thức để tính toán. Công thức tính  là 2^n và 2^h – 2 ( 2^m -2 ), -Để tính tổng số subnet có được sau khi chia ta dùng công thức 2^n, trong đó n là số […]

IP Subnet Calculations

1. IP Addressing At this point you should know that IP, the Internet Protocol, is a network layer (OSI layer 3) protocol, used to route packets between hosts on different networks. To suit this purpose, IP must define an addressing scheme, so that a packet’s intended destination can be indicated. An IP address is composed […]

Subnet Mask – VN

Thanks to DuonglaoSu: Subnet Masks Khi ta chia một Network ra thành nhiều Network nhỏ hơn, các Network nhỏ nầy được gọI là Subnet. Theo quy ước, các địa chỉ IP được chia ra làm ba Class (lớp) như sau: Address Class Subnet mask trong dạng nhị phân Subnet mask Class A 11111111 00000000 […]