Open Port 25 to All

[root@server mail]# netstat -vatn

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN 

After looking through several files I discovered how to fix it:
First you need to edit /etc/mail/sendmail.mc, find the following section:
dnl This changes sendmail to only listen on the loopback device 127.0.0.1 dnl and not on any other network devices. Comment this out if you want dnl to accept email over the network. DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')

You will need to comment out the like with DAEMON_OPTIONS, using "dnl" at the begining of the line:
dnl This changes sendmail to only listen on the loopback device 127.0.0.1 dnl and not on any other network devices. Comment this out if you want dnl to accept email over the network. dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')

You will then need to restart sendmail

/etc/init.d/sendmail restart

Once you have done this sendmail will listen on all IP address on the system:

[root@server mail]# netstat -vatn
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN 

And you can recieve mail from others, and send mail from your clients.

Installing FFMpeg

yum install ffmpeg ffmpeg-devel

If you get package not found, then you will need to add few lines in the yum repository for dag packages installation. Create a file named  /etc/yum.repos.d/dag.repo with the following contents on it

[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=1
enabled=1

then

yum install ffmpeg ffmpeg-devel

Linux Change Default User Home Directory While Adding A New User

By default base directory for the system user is set to /home directory. I'd like to add user to /iscsi/home/${user} directory instead of the default /home. How do I force useradd command to add user to /iscsi/home under CentOS / RHEL / Fedora Linux server?

Default values for account creation defined in /etc/default/useradd file under CentOS / RHEL / Fedora / Debian / Ubuntu and other Linux distros. Simply open this file using a text editor, type:
# vi /etc/default/useradd

The default home directory defined by HOME variable, find line that read as follows:
HOME=/home

Replace with:
HOME=/iscsi/user

Save and close the file. Now you can add user using regular useradd command:
# useradd vivek
# passwd vivek

Verify user information:
# finger vivek

Output:

Login: vivek                            Name: Vivek Gite
Directory: /iscsi/user/vivek                Shell: /bin/bash
Last login Thu Sep 13 07:58 2007 (IST) on pts/1 from 10.16.15.2
No mail.
No Plan.

How Do I Change Existing User's Home Directory?

You need to use the usermod command to set the user's new login directory. The syntax is as follows:

 
usermod -m -d /path/to/new/home/dir userNameHere
 

Where,

1. -d dirnanme : Path to new login (home) directory.
2. -m : The contents of the current home directory will be moved to the new home directory, which is created if it does not already exist.

In this example set the user's new login directory to /users/v/vivek from /home/vivek, enter:
# usermod -m -d /users/v/vivek vivek

 Source : http://www.cyberciti.biz/faq/howto-change-default-home-directory/

Firefox browser tool to test Responsive Web design

Modern web browsers are more developer friendly, by providing Developer Tools to make web development easy. Thanks to Mozilla for integrating a feature, which allows to test the Responsive Web design with out using various physical devices.
How to use Responsive Web Design feature in Firefox?

1. Launch Mozilla Firefox(Latest Version).
2. Browse the website which you wish to test. For example – i will take – http://tickletheweb.com website, which is developed to have consistent view across the devices.

3.   Click on Firefox button on the left top corner of the browser, and select Web Developer –> Responsive Design View.

4.  It loads the Responsive Design View chrome -

5.  Select different resolutions from the dropdown control on the left corner of the chrome to test the website in different resolutions, which is simple and great.

6.  It also allows to test  Portrait or Landscape orientations. Click on rotate button, which toggles between the orientations.

Happy Web programming!!!

Source : https://roopeshreddy.wordpress.com/2013/05/26/firefox-browser-tool-to-test-responsive-web-design/

Getting Started - Installing Git

Installing Git

Before you start using Git, you have to make it available on your computer. Even if it’s already installed, it’s probably a good idea to update to the latest version. You can either install it as a package or via another installer, or download the source code and compile it yourself.

This book was written using Git version 2.0.0. Though most of the commands we use should work even in ancient versions of Git, some of them might not or might act slightly differently if you’re using an older version. Since Git is quite excellent at preserving backwards compatibility, any version after 2.0 should work just fine.

Installing on Linux

If you want to install Git on Linux via a binary installer, you can generally do so through the basic package-management tool that comes with your distribution. If you’re on Fedora for example, you can use yum:

$ yum install git

If you’re on a Debian-based distribution like Ubuntu, try apt-get:

$ apt-get install git

For more options, there are instructions for installing on several different Unix flavors on the Git website, at http://git-scm.com/download/linux.

Installing on Mac

There are several ways to install Git on a Mac. The easiest is probably to install the Xcode Command Line Tools. On Mavericks (10.9) or above you can do this simply by trying to run git from the Terminal the very first time. If you don’t have it installed already, it will prompt you to install it.
If you want a more up to date version, you can also install it via a binary installer. An OSX Git installer is maintained and available for download at the Git website, at http://git-scm.com/download/mac.

Git OS X Installer.

You can also install it as part of the GitHub for Mac install. Their GUI Git tool has an option to install command line tools as well. You can download that tool from the GitHub for Mac website, at http://mac.github.com.

Installing on Windows

There are also a few ways to install Git on Windows. The most official build is available for download on the Git website. Just go to http://git-scm.com/download/win and the download will start automatically. Note that this is a project called Git for Windows (also called msysGit), which is separate from Git itself; for more information on it, go to http://msysgit.github.io/.
Another easy way to get Git installed is by installing GitHub for Windows. The installer includes a command line version of Git as well as the GUI. It also works well with Powershell, and sets up solid credential caching and sane CRLF settings. We’ll learn more about those things a little later, but suffice it to say they’re things you want. You can download this from the GitHub for Windows website, at http://windows.github.com.

Installing from Source

Some people may instead find it useful to install Git from source, because you’ll get the most recent version. The binary installers tend to be a bit behind, though as Git has matured in recent years, this has made less of a difference.
If you do want to install Git from source, you need to have the following libraries that Git depends on: curl, zlib, openssl, expat, and libiconv. For example, if you’re on a system that has yum (such as Fedora) or apt-get (such as a Debian based system), you can use one of these commands to install all of the dependencies:

$ yum install curl-devel expat-devel gettext-devel \
  openssl-devel zlib-devel

$ apt-get install libcurl4-gnutls-dev libexpat1-dev gettext \
  libz-dev libssl-dev

When you have all the necessary dependencies, you can go ahead and grab the latest tagged release tarball from several places. You can get it via the Kernel.org site, at https://www.kernel.org/pub/software/scm/git, or the mirror on the GitHub web site, at https://github.com/git/git/releases. It’s generally a little clearer what the latest version is on the GitHub page, but the kernel.org page also has release signatures if you want to verify your download.
Then, compile and install:

$ tar -zxf git-1.9.1.tar.gz
$ cd git-1.9.1
$ make configure
$ ./configure --prefix=/usr
$ make all doc info
$ sudo make install install-doc install-html install-info

After this is done, you can also get Git via Git itself for updates:

$ git clone git://git.kernel.org/pub/scm/git/git.git

Source : http://git-scm.com/book/en/v2/Getting-Started-Installing-Git 

Server KMS

source : http://www.dbuggr.com/smallwei/resolve-windows-error-0xc004d307-maximum-rearms/

login root wd sharespace ssh

username is 'root'
password is 'welc0me'