Relay SMTP usually used by mail server with dynamic IP address. In this guide, I will show how to setup relay SMTP on Postfix. Requirement: Postfix installed on Ubuntu SMTP server (you can use ISP’s SMTP) email address and password to login to SMTP server How to: Create password map file $ sudo nano /etc/postfix/sasl_passwd…
WD My Book Live is network storage installed with Debian Linux operating system. We can setup this device to be our web server at home. Here are the steps how I did it. SECTION 1 Follow this Section 1 if you haven’t upgrade the firmware and you don’t want to use Debian Squeeze. If you…
I received email from cronjob saying that there was PHP module already loaded: PHP Warning: Module ‘mysql’ already loaded in Unknown on line 0 This warning happens when there is PHP extension loaded more than once. To fix this problem, check /etc/php5/apache2/php.ini file and the corresponding module configuration file in /etc/php5/conf.d/. For mysql module, I…
EHCP is a free and open source web hosting control panel. This guide will show you how to install it on Ubuntu server. Check /etc/apt/sources.list. It should have the following line (replace oneiric with your version). deb http://archive.ubuntu.com/ubuntu/ oneiric main restricted deb-src http://archive.ubuntu.com/ubuntu/ oneiric main restricted deb http://archive.ubuntu.com/ubuntu/ oneiric-updates main…
Nowadays some Internet Service Provider block port 25 which is used by SMTP. We can change this in Postfix to point to another port, for example port 587. Edit /etc/postfix/master.cf $ sudo nano /etc/postfix/master.cf Add # in front of this line: smtp inet n – – – – smtpd and add new line: 587 inet…
It is important to disable root login in your SSH service. To do this, edit /etc/ssh/sshd_config: # pico /etc/ssh/sshd_config And add in the following line: PermitRootLogin no Restart SSH service: # /etc/init.d/sshd restart
There are two approaches to change Grub boot order: command line and GUI. For command line method: Run this command to edit /etc/default/grub: $ sudo nano /etc/default/grub Change the number in GRUB_DEFAULT line. First boot menu is numbered 0. If it is 6th boot menu, type in GRUB_DEFAULT=5. Press CTRL-X, press Y, press Enter (save…
There is a problem in Virtualbox for Linux in which it can not download Virtualbox Guest Additions automatically. It shows error message with download link, but the link doesn’t work. You have to download it manually from http://download.virtualbox.org/virtualbox/. Go to desired folder and download the .iso file. After that, mount the .iso file and install…
VNC is a protocol that allows a desktop to be viewed and controlled remotely over the Internet. This is how to create VNC tunnel via SSH. Requirements: Ubuntu system (as VNC Server) Windows system (as VNC Viewer) PuTTY for Windows TightVNC Viewer or RealVNC for Windows In Ubuntu PC, install x11vnc and openssh-server: $ sudo…
What is DNS tunnel? Technique to tunnel IPv4 data through DNS server. Why do we use DNS tunnel? We use DNS tunnel when in situation where our internet access is blocked by firewall, but DNS queries is allowed (e.g: in office, hotspot internet). Requirements: Ubuntu PC Iodine package Windows PC to test the tunnel…