I had a real Linux server system that I need to convert into virtual server, because I wanted to sell my old hardware, but I needed the system as backup. This backup is able to run as virtual server. This is a very useful backup method. This tutorial show you how you can convert your whole system into virtualbox system. Virtualbox is a free opensource virtual computer solution from Oracle.
1. Backup your system disk
If you can, put your system disk to another computer. But if you can't do it you can do it the original system.
Check active scsi devices:
[1:0:1:0] disk ATA SAMSUNG HD103SJ 1AJ1 /dev/sda
[2:0:0:0] disk ATA SAMSUNG HD103SJ 1AJ1 /dev/sdb
[3:0:0:0] cd/dvd HL-DT-ST DVDRAM GH22NS90 HN00 /dev/sr0
[5:0:0:0] disk Generic STORAGE DEVICE 9451 /dev/sdd
[6:0:0:0] disk GT-I5700 - Card /dev/sdc
Now refresh SCSI devices. Use this command to refresh host0 (or host1, host2, host3):
ubuntu@ubuntu:~$ echo "- - -" | sudo tee -a /sys/class/scsi_host/host0/scan
Check the result:
I want to see the intranet website from home with my linux laptop. I can connect over SSH to the intranet web server. But I want to see the webpage in a browser of my laptop.
The solution is SSH port forwarding. From my Linux laptop. Here is the syntax:
ssh -L <myPortNumber>:<RemoteIP>:<RemotePort> <host> [other ssh options like port and user]
I used this:
ssh -L 8088:127.0.0.1:80 intranetserver.example.com
Now I can click to http://localhost:8088/ on my favorite browser and I can browse the intranet.
This small tutorial work on Ubuntu Hardy (8.04), Lucid 10.04 and Maverick (10.10)
Install Imagemagick and GraphicsMagick
apt-get install imagemagick graphicsmagick
Install Image Magick development files
apt-get install libmagickcore-dev libmagickwand-dev
gem install rmagick
Install imagemagick from source and after it install development files:
There are some easy steps to install Phusion Passenger for ruby 1.9.2 and apache2 on Ubuntu Linux.
1. Install rvm system wide
sudo bash < <( curl -L http://bit.ly/rvm-install-system-wide )
2. Install ruby 1.9.2
rvm install 1.9.2
3. add new line in /etc/bash.bashrc
[[ -s /usr/local/lib/rvm ]] && . /usr/local/lib/rvm
4. install passenger
sudo -i # you need root shell
rvm use 1.9.2-p0@global # or your version, use: rvm list
My spam traffic has decreased to minimum after I've inserted following lines in /etc/postfix/main.cf file (Postfix main configuration file). These settings made my SMTP server to spam resist. This method use DNS queries, what mean very fast UDP communication and use less memory and CPU then any spamfilter. If your hardware is weak or an all-in-one server than use this really fast and effective method.
Before: I received 200-300 spam a day.
Now: I receive only 1-2 unsolicited email a day.
Google dont't like indexing a duplicated content. Have you got more domains that point to the same content? Is your site available at www and non-www version of the domain? (example: www.bitprison.net and bitprison.net point to same content) More domain point to my blog: bitprison.com, bitprison.net, bitprison.org and bitprison.hu. I need a solution for avoid duplicated content. I've chosen 301 redirection that google recommends for webmaters in case of duplicated content. It may help Google to determine PageRank for your site more accurately.
Now I'm sharing with you two ways of redirection.