Bala-Krishna

Cloud Hosting Technology is advanced new technology adapted by few web hosting providers. The technology works over the fleet of computers called hosting cloud that built to meet certain goals set by the hosting provider. In the cloud hosting, deployed application automatically inherit clustered processing, load-balancing, and redundant storage depend on the application requirement you are going to deploy. for example, if you are going to load .Net based application then the application will be set to processed on windows cluster. The process is completely automatic without user intervention. In the same way, Linux based application will be processed on Linux cluster.

This technology has several new features that certainly make the process of web development easier and faster:

• Cloud Hosting manged over set of computer clubbed together to meet certain requirement. So there is No Server, OS or device virtually to setup or manage. User simply need to load your application and rest of the things handled automatically.
• This technology is extremely flexible because provider are open to load lot of technology that beneficial for users to use. You can switch to different framework easily if you want to move from old technology framework you use.
• Upgrades are very easy to achieve in Cloud Hosting Environment. The technology upgrade that is obsolesce allow user to adapt new technology quickly.

Finally Fedora 9 has been released. Fedora is a community supported operating system sponsored by Red Hat. It is maintained by fedora community members accross the world. Beside RHEL, Fedora is free, open to use and modify it to best suit your need. You are always open to distribute it.

New Features

• GNOME 2.22 used in this release that includes webcam photo and video creation utility called Cheese.
• Improved network filesystem support.
• New improved international clock applet.
• Google Calendar support and custom email labels in Evolution.
• New Remote Desktop Viewer and improved accessibility features.
• KDE 4.0.3 and Xfce 4.4.2 is included in this release.
• NetworkManager 0.7 provides improved mobile broadband support, including GSM and CDMA devices, and now supports multiple devices and ad-hoc networking for sharing connections.
• It is now enabled by default on installations from DVD, CD, the network, and Live images.
• Supports partition resizing for ext2/3, NTFS filesystems.L
• Live USB images support available.
• FreeIPA makes managing auditing, identity and policy processes easier by providing web-based and command line provisioning, and administration tools to ease system administration. FreeIPA combines the power of the Fedora Directory Server with FreeRADIUS, MIT Kerberos, NTP and DNS to provide an easy, out of the box solution.
• Next generation Ext4 support for better performance, higher storage capacity and several other new features.
• Fedora 9 uses Upstart, an event-based replacement for the /sbin/init daemon.
• Firefox 3 support for native look and feel and desktop integration.
• By default now support and installed free and open source Java environment OpenJDK 6
• OpenOffice.org 2.4 included with many new features.
• Fedora 9 includes Perl 5.10.0 features a smaller memory footprint and other improvements.
• Fedora 9 features a 2.6.25 based kernel.
• Automatic report kernel crashes to http://www.kerneloops.org

Download

i386 - Install DVD
x86_64 - Install DVD
ppc - Install DVD
i386 - Install CDs
x86_64 - Install CDs
ppc - Install CDs

Check out more download option here

You may receive “Failed To Find Flength File” error during file upload using uber uploader. The main cause of this problem is due to apache mod_security enabled on your host. Apache mod_security may prevent writing flength file duing file upload. This will cause uploder to determine file length for percentage calculation and uploader produce file length error.

Solution: This problem can be easily solve by turn off mod_security through .htaccess . We need to turn off mod_security for uploader directory. To solve this problem, create .htaccess file with the following line and upload file to the directory where uploader files reside.

<IfModule mod_security.c>
# Turn off mod_security filtering.
SecFilterEngine Off

# The below probably isn’t needed,
# but better safe than sorry.
SecFilterScanPOST Off
</IfModule>

Word Press default widget does not allow you to use php code. You can do this by simply editing template files but this is not overall solution. By doing this you are loosing beauty of widget drag and drop functionality. The Samsarin PHP Widget available as plug-in that allow user to create new widget and add php code inline with text.

Installation & Usage

• Go to the Samsarin PHP Widget website.
• Download and Extract the zip file in wordpress plugins directory.
• Enable the Samsarin PHP Widget from Admin Panel.
• In your admin console, go to Presentation, and then go to Sidebar Widgets
• Create number of PHP Widgets you are required to add.
• Drag one of the available Samsarin PHP Widgets to your sidebar.
• Click on the widget button add title and php code.
• All you have done..

Like the windows, gz is common compression utility in Linux. This guide is to extract content of the .gz file by gunzip utility. Here is the command to see and extract content of the gz file.

View gz file content

gunzip -c mybackup.gz

Extract file file content in another file. you can use different file extension depend on the content of file.

gunzip -c mybackup.gz > mybackup.sql

Compress the mybackup.sql file as mybackup.gz in the current directory.

gunzip -c mybackup.sql > mybackup.gz

Here is the full details of the gzip command.

Read the rest of this entry »

Installing FFMPEG from the source in window platform is easy as you do for other window application. Here is the complete instructios how to build FFMPEG in windows. To install FFMPEG on windows you need to install third party MinGW and MSys library that is compatible with GCC. This library is required to build ffmpeg in windows and support shell to run commands.

Download MinGW and MSys

MinGW: MinGW Direct download link
MSys: MSys Direct download link
SF Link: Sourceforge MinGW MSys Package Download Page
FFMPEG: FFMPEG Download fully patched version

Building FFMPEG

It is time to install ffmpeg. Extract downloaded ffmpeg archive in c: folder. If you have not downloaded yet please download now then run MSys.bat file from C:\msys\1.0\ folder. This location will be depend on you MinGW and MSys installation. In the command prompt run the following commands:

$ cd c:/ffmpeg-0.4.7

$ ./configure –extra-cflags=”-mno-cygwin -mms-bitfields” –extra-ldflags=”-Wl,–add-stdcall-alias” –enable-mingw32 –enable-shared –disable-a52 –disable-pp –disable-ffserver –disable-ffplay
$ make

Clip-Share is mature script to run your own video sharing website like YouTube. This script is available variety of features and options at low cost. Unfortunately, they don’t have good knowledge base to short out technical problems related to script installation. The common problem with Clipshare and other video sharing script is in video upload and conversion module. Here is the error i received while i tried to upload video. The script produce error in initialization of progress bar.

Error:Â “returned status code 500 Internal Server Error”

Possible Solution:

• Check cgi-bin directory and files permission. In the script, upload progress monitored by perl script so that cgi-bin directory and files inside directory should have 755 permission. Make the changes if applicable.
• Check temp and video path setting in “cgi-bin/configs/uu_default_config.pm” file. It should point to correct folder. Both these folder should be writable by webserver.
  temp_dir                => ‘/home/domain/public_html/tmp/’,
  upload_dir              => ‘/home/domain/public_html/video/’,
• Check flvideo folder permission in your installation directory. It should be writable by webserver.

WHM is a Web Host Manager tool that allows server administrators to quickly and easily add new web hosting accounts on a WHM enabled Web server. Here is steps to create new hosting account without hassle.

1. Log into WHM account with your username and password.
2. Click the Create a New Account link from the Account Functions menu.
3. Enter the domain name into the Domain field, and the username into the UserName field. The UserName field will initially default to a name based on the domain you enter, but you may change it if you wish.
4. Enter a password into the Password field, and the disk quota into the Quota field. The Quota field, measured in MegaBytes, controls how much hard-disk space the new account is allotted.
5. Decide whether to allow CGI access, Shell access and FrontPage extensions, then check the respective boxes accordingly.
6. Decide on limits for the following boxes and enter values for each in the text field for each: Max FTP Accounts, Max Email Accounts, Max Email Lists, Max SQL Databases and Max Sub Domains.
7. Enter the maximum bandwidth for the account (in MegaBytes) into the Bandwidth Limit field.
8. Click on “Create” button.

Here is the very useful list of commands used to manage users.

1. su (1) - run a shell with substitute user and group IDs
2. useradd (8) - Create a new user or update default new user information
3. userdel (8) - Delete a user account and their files from the system. The command “userdel -r newuser” will remove the user and deletes their home directory.
4. usermod (8) - Modify a user account.
5. adduser(8) - Command used to add user accounts.
6. chage (1) - Used to change the time the user’s password will expire.
7. chfn(1) - Change a user’s finger information
8. chsh(1) - Change a user’s shell.
9. chgrp (1) - Changes the group ownership of files.
10. chown (1) - Change the owner of file(s ) to another user.
11. gpasswd (1) - Used to administer the /etc/group file.
12. groupadd (8) - Create a new group.
13. grpconv (8) - Creates /etc/gshadow from the file /etc/group which converts to shadow passwords.
14. grpunconv (8)- Uses the files /etc/passwd and /etc/shadow to create /etc/passwd, then deletes /etc/shadow which converts from shadow passwords.
15. groupdel (8) - Delete a group
16. groupmod (8) - Modify a group
17. groups (1) - print the groups a user is in
18. grpck (8) - Verify the integrity of group files.
19. id(1) - Print group or user ID numbers for the specified user.
20. newgrp(1) - Allows a user to log in to a new group.
21. newusers (8) - Update and create new users in batch form.
22. nologin (5) - Prevent non-root users from logging onto the system.
23. passwd (1) - Used to update a user’s password. The command “passwd username” will set the password for the given user.
24. pwconv (8) - Used to create the file /etc/shadow from the file /etc/passwd to convert to shadow passwords.
25. pwunconv (8) - Uses the files /etc/passwd and /etc/shadow to create /etc/passwd, then deletes /etc/shadow to convert from shadow passwords.

FFMPEG is a most popular command line tool to convert media files such as audio, video and images from one format to another. We are going to learn ffmpeg command usage to convert other media format to current most popular streaming FLV format. FFMPEG is cross platform tool and does not require any Gui, support several command line options to control your conversion. The other video format can not be played directly in web browser. A right way to publish your videos for viewing in a browser is using FLV wide acceptable format.

How to convert / FFMPEG usage command

Convert other video format to FLV

ffmpeg -i video.avi -ar 22050 -ab 32 -f flv -s 320×240 video.flv

-i input file name
-ar audio sampling rate in Hz
-ab audio bit rate in kbit/s
-f output format
-s output dimension

Convert other video to FLV with metadata

This require flvtool2 tool to be installed on your box.

ffmpeg -i video.avi -ar 22050 -ab 32 -f flv -s 320×240 - | flvtool2 -U stdin video.flv

Convert FLV vidoe to jpg image sequence

This command used to extract frame image sequence.

ffmpeg -i video.flv -an -r 1 -y -s 320×240 video%d.jpg

-i Input file name
-an disable audio
-r fps
-y overwrite file
-s output dimension

Convert particular frame to jpg

Return one particular jpeg image of the frame based on start and end time.

ffmpeg -i video.flv -an -ss 00:00:03 -t 00:00:01 -r 1 -y -s 320×240 video%d.jpg

-ss record start time
-t record end time last for

Return first frame of video as jpeg image.

ffmpeg -i video.flv -vcodec png -vframes 1 -an -f rawvideo -s 320×240 video%d.jpg