MAC – Easy to Use?

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• Ubuntu: Ctrl-R
• Mac: ?

Create a new text file.

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• Ubuntu: Right click
• Mac: ?

How to access Wamp Server running on Windows 2008 from other computer?

The firewall rules on Windows 7 or Windows 2008 or later version may not allow you access to your web site running by WampServer from other computer. To fix this problem:

Step 1: Update httpd.conf to add this line
Allow from 192.168.1.0/255.255.255.0 # for LAN
#or
Allow from all # for any computer in the world
Remember to restart Apache server after change the httpd.conf

Step 2: Check Windows Firewall.

• Is the port 80 open?
• Is the Apache Web Server (\wamp\bin\apache\Apache2.4.4\bin\httpd.exe allow to receive the request from other?

Apple iPad 2 vs. Toshiba Thrive vs. Acer Iconia Tab vs. Samsung Galaxy Tab vs. Motorola Xoom

There is no question that Apple iPad 2 is a leading table. Let compare it with other 16GB Wi-Fi tablets.

Tablet	Apple iPad 2	Toshiba Thrive	Acer Iconia Tab A500	Samsung Galaxy Tab	Motorola Xoom Family Edition
Operating System (OS)	Apple iOS 4, 5	Google Android 3.1, 3.2	Google Android 3.1	Google Android 3.1	Google Android 3.1
Screen Size	9.7-inch	10.1-inch	10.1-inch	10.1-inch	10.1-inch
Screen Resolution	1024x768	1280x800	1280x800	1280x800	1280x800
Processor	1GHz dual-core Apple A5	1GHz Dual-core	1GHz Dual-core NVIDIA® Tegra™ 2	1GHz Dual-core NVIDIA® Tegra™ 2	1GHz Dual core
Memory (RAM)	512MB	1GB DDR2	1GB DDR2	1GB	1GB
Storage (ROM)	16/32/64 GB	8/16/32 GB	8/16/32 GB	16 or 32 GB	16GB
Expandable memory	None	Full-size SD Card slot. Up to 128GB SDXC	microSD, microSDHC	None	Up to 32 GB microSD card
Back Camera	1MP. Video recording, HD (720p)	5MP with auto-focus, 720p video capture	5MP with auto focus and single LED flash	3MP auto-focus camera with LED flash. HD(720p) Video recording	5MP auto-focus camera with LED flash. 720p video capture
Front Camera	0.3MP VGA	2MP	2MP	2MP	1.3MP
Microphone	Yes	Yes	Yes		Yes
HDMI	No	Yes	Yes	No	Yes
USB	No	Mini USB 2.0 port, Full-size USB 2.0 port	1 USB 2.0	No	Micro USB
Wi-Fi	802.11a/b/g/n	802.11b/g/n	802.11b/g/n	802.11 a/b/g/n Dual-band (2.4GHz, 5GHz)	802.11b/g/n
Battery	10 hrs	11 hrs	8 hrs	9 hrs	10 hrs
Weight	1.33 lbs	1.60 lbs	1.69 lbs	1.25 lbs	1.43 lbs
Flash support		Yes		Yes	Yes
Price	$500/$600/$700	$380/$400/$480	$350/$450/$500	$500/$600	$400

Steve Jobs

Steve Jobs, the mastermind behind Apple's iPhone, iPad, iPod, iMac and iTunes, passed away on Wednesday, Oct. 5, 2011. Jobs was 56.

Apple said in a statement on its website: "Apple has lost a visionary and creative genius, and the world has lost an amazing human being. Those of us who have been fortunate enough to know and work with Steve have lost a dear friend and an inspiring mentor. Steve leaves behind a company that only he could have built, and his spirit will forever be the foundation of Apple."

Well said, I have nothing to add. But I would like to share "one more thing". One of the things I learn from Steve Jobs in WWDC 1997: “And you know the hardest thing is, when you think about focusing right, you think well focusing is about saying yes. No. Focusing is about saying no. Focusing is about saying no. And you got to say no no no. And when you say no, you piss off people… and the result of that focus, is going to be really great products, where the total is much greater than the sum of the parts.”

Rest In Peace, Steve.

How long 2011 Developer Conferences Sold Out?

Microsoft BUILD conference occurred in Anaheim, California from Sept. 13 to Sept 16, 2011. In this developer conference, Microsoft introduced Windows 8. How long did it take Microsoft to sell out? Two months. (http://www.electronista.com/articles/11/08/02/windows.8.focused.build.conference.now.sold.out/ and http://blogs.msdn.com/b/msdnmagazine/archive/2011/08/04/10192770.aspx)

Three months ago, Apple Worldwide Developers Conference (WWDC) 2011 ran from June 6 to June 10, 2011 in San Francisco.  Steve Jobs introduced IOS 5 at this event. How long did it take to sell out? 10 hours. (http://blogs.computerworld.com/18047/apple_wwdc_2011_tickets_registration_sell_out)

Earlier this year, Google I/O 2011 from May 10 to May 11 also took place in San Francisco, California. The ticket to this developer event sold out in record time, not days, not hours but in minutes : 59 minutes. (http://techcrunch.com/2011/02/07/google-io-tickets-sell-out-in-59-minutes/)

Thus, we know which technology is most attractive to developer.

Is Free Software Open Source?

No. Some software or applications are free to use but they are not open source. For example, Microsoft Security Essentials is free to use on licensed Microsoft Windows operating system but you can not get the source code. LibreOffice is the power-packed free and open source personal productivity suite for Windows, Macintosh and GNU/Linux. You can download LibreOffice's source code to look at, modify, build and run.

The Open Source Definition:
1. Free Redistribution
2. Source Code
3. Derived Works
4. Integrity of The Author's Source Code
5. No Discrimination Against Persons or Groups
6. No Discrimination Against Fields of Endeavor
7. Distribution of License
8. License Must Not Be Specific to a Product
9. License Must Not Restrict Other Software
10. License Must Be Technology-Neutral

Free Fast Public DNS

If you experience a slow internet response, your DNS (Domain Name System) may have outage. You can use the follow free fast public DNS below to improve the speed and more security.

Google Public DNS:
8.8.8.8
8.8.4.4

* OpenDNS:
208.67.222.222
208.67.220.220

Level-Three GTEI Public DNS:
4.2.2.1
4.2.2.2
4.2.2.3
4.2.2.4
4.2.2.5
4.2.2.6

* Norton DNS by Symantec:
198.153.192.1
198.153.194.1

* ScrubIT DNS:
67.138.54.100
207.225.209.66

DNS Advantage:
156.154.70.1
156.154.71.1

* In additon to block the bad sites that are potentially harmful to your computer, OpenDNS, NortonDNS and ScrubIT DNS allow you to set your owm content filtering policy.

Running ASP.net on Ubuntu 11.04 using Apache 2 web server

1.1 Install the mod_mono packages:
sudo apt-get install libapache2-mod-mono mono-apache-server2

1.2 Install the mono development tools packages:
sudo apt-get install mono-devel (optional)

2. Enable the Apache module:
sudo a2enmod mod_mono_auto

3. Restart Apache: sudo /etc/init.d/apache2 restart

To test your setup, you can create a test page with the following content anywhere that Apache can see (i.e. /var/www/test.aspx)

References:
https://help.ubuntu.com/community/ModMono
http://www.mono-project.com/Mod_mono
http://ubuntuexperiment.wordpress.com/2009/01/29/running-aspnet-applications-in-ubuntu-using-modmono/
http://thelinuxexperiment.com/uncategorized/setting-up-an-ubuntu-based-asp-net-server-with-mono/
http://www.hbyconsultancy.com/blog/install-asp-net-3-5-environment-for-ubuntu-maverick-10-10.html

Compare 3G, 4G,Wi-Fi, WiMAX, and Ethernet (Wired)

Summary from Wikipedia and other places in internet:

3G is a generation of standards for mobile phones and mobile telecommunications services fulfilling specifications by the International Telecommunication Union. Application services include wide-area wireless voice telephone, mobile Internet access, video calls and mobile TV, all in a mobile environment.

4G is the fourth generation of cellular wireless standards. It is a successor to 3G and 2G families of standards. A 4G system is expected to provide a comprehensive and secure all-IP based solution where facilities such as ultra-broadband (giga-bit speed such as 1000+ MiB/s) Internet access, IP telephony, gaming services, and streamed multimedia may be provided to users.

Wi-Fi is a trademark of the Wi-Fi Alliance. It is not a technical term. However, the Alliance has generally enforced its use to describe only a narrow range of connectivity technologies including wireless local area network (WLAN) based on the IEEE 802.11 standards, device to device connectivity.

WiMAX (Worldwide Interoperability for Microwave Access) is a telecommunications protocol that provides fixed and fully mobile Internet access. The current WiMAX revision provides up to 40 Mbit/s with the IEEE 802.16m update expected to offer up to 1 Gbit/s fixed speeds.

Ethernet is a family of frame-based computer networking technologies for local area networks (LANs).  Ethernet is standardized as IEEE 802.3. The combination of the twisted pair versions of Ethernet for connecting end systems to the network, along with the fiber optic versions for site backbones, is the most widespread wired LAN technology. It has been used from around 1980 to the present.

Data transfer rates in order from low to high speed:

• 3G:  128Kbps to 384Kbps
• 10BASE-T Ethernet (Wired) 802.3: 10Mbps
• Wi-Fi 802.11b: 11MBps (Max)
• Wi-Fi 802.11g: 54MBps (Max)
• 100BASE-T Fast Ethernet (Wired) 802.3u: 100 Mbps
• Wi-Fi 802.11n: 300MBps  (Max)
• 4G: 100Mbps (mobile) to 1GBps (fixed)
• WiMax 802.16m: 40Mbps to 1Gbps
• 1000BASE-T Fast Ethernet (Wired) 802.3: 1GBps

4G and Wi-Fi have almost the same bandwidth. The difference between them is in range. Wi-Fi is targeted to cover low range networks, while 4G was designed to replace high range mobile networks.