linux file permission simplest rule of thumb

Chmod 777 –R /var/www/html/webdir

Permission level

1.       r (read)       =  4

2.       w (write)     =  2

3.       x (execute)  =  1

For example : 

chmod 753 abc.txt thus means
assign (4+2+1)(4+1)(2+1) to abc.txt
=>
assign (rwx)(rx)(wx) to abc.txt
assign (owner)(group)(other) to abc.txt

Another example

chmod 572 dump.txt thus means
assign (4+1)(4+2+1)(2) to  dump .txt
=>
assign (rw)(rwx)(w) to  dump .txt

Sending Email With Attachments From Unix / Linux Command

If you need to send an email with a text file (or binary file) as attachment using shell script or command prompt in Unix or Linux; try mutt - a terminal-based e-mail client for Unix-like systems.

mutt -s "Test mail" -a /tmp/shahzeb.tar.gz shahzeb143@gmail.com < /tmp/mailmessage.txt

Where,

• shahzeb143@gmail.com   - is the recipient.
• /tmp/mailmessage.txt - is the main body of the e-mail (read message from the file "mailmessage.txt").
• -a /tmp/shahzeb.tar.gz - is an attachment.
• -s "Test mail" - is a subject line of email Message.

If MUTT is not available???

If mutt is not installed, use the apt-get or yum or up2date commands as follows (you must login as a root user). Debian / Ubuntu Linux user type the following command to install mutt client:

# apt-get install mutt

OR

# yum install mutt 

Some useful resources 

• http://www.serveridol.com/2011/08/01/mutt-sending-attachments-commandline/
• http://tech.isaaclw.com/2009/11/mutt-scripting-mail.html
• http://www.ucolick.org/~lharden/learnmutt.html

php soap client Uncaught SoapFault exception

I was receiving the following error while running a php soap client on my live server
googled but of no use

[Tue May 22 12:09:33 2012] [error] [client 39.47.135.86] PHP Fatal error:  Uncaught SoapFault exception: [HTTP] Error Fetching http headers in /var/www/html/abc/xyz.php:7\nStack trace:\n
#0 [internal function]: SoapClient->__doRequest('
#1 /var/www/html/abc/xyz.php(7): SoapClient->__soapCall('auth_method', Array)\n
#2 /var/www/html/abc/def.php(12): soapclient('user', 'pass')\n
#3 {main}\n  thrown in /var/www/html/abc/xyz.php on line 7, referer: http://192.168....../abc/xyz.php?msgs=%3Cdiv%20class=%27eRR%27%3EPlease%20log%20in%20to%20visit%20this%20page%3C/div%3E

Solution: There was a little bug missing ";" in my soap server - I think some one changed the file.
check the remote file /Server there may b some error in Soap Server

nginx

some helpful URLs for a starter to install and configure nginx with php and phpmyadmin on ubuntu

1. http://www.howtoforge.com/installing-nginx-with-php5-and-mysql-support-on-debian-squeeze
2. http://www.howtoforge.com/installing-nginx-with-php5-and-mysql-support-on-debian-squeeze
3. http://www.howtoforge.com/installing-nginx-with-php5-and-php-fpm-and-mysql-support-on-ubuntu-11.10
4.http://www.howtoforge.com/running-phpmyadmin-on-nginx-lemp-on-debian-squeeze-ubuntu-11.04
5. http://rubyist-journal.com/2010/02/28/howto-nginx-php5-mysql-phpmyadmin-ubuntu-shortest-setup/

detailed step by step process can be found at

http://eaziweb.blogspot.com/2012/05/installing-nginx-with-php5-and-mysql.html

Install phpMyAdmin on CentOs

while installing phpmyadmin on my local machine using vmware at Centos 5.5.

i faced some problems so thought to share the steps for other to overcome these problems.

1. Update the packages

# yum update -y

2. Install MySQL packages

# yum install mysql-server mysql mysql-devel

3. Make MySQL boot up automatically

# chkconfig mysqld on

4. Start MySQL service

# service mysqld start
# /etc/init.d/mysqld restart

5. Set the password for the root user

# /usr/bin/mysql_secure_installation (Recommended)
OR
# mysqladmin -u root password eaziweb

6. Install php and common packages

# yum install php php-gd php-imap php-mysql php-pear php-xml phpxmlrpc curl libxml2 php-mbstring php-mcrypt

7. Install phpMyAdmin

Because the version of php on CentOS 5.5 is 5.1.6, we only can install phpMyAdmin 2.x, I choose 2.11.11.3.

# cd /usr/share
# wget http://sourceforge.net/projects/phpmyadmin/files/phpMyAdmin/2.11.11.3/phpMyAdmin-2.11.11.3-english.tar.gz/download
# tar xvfz phpMyAdmin-2.11.11.3-english.tar.gz
# mv phpMyAdmin-2.11.11.3-english phpmyadmin
# rm phpMyAdmin-2.11.11.3-english.tar.gz
# cd phpmyadmin
# cp config.sample.inc.php config.inc.php

8. Edit the config.inc.php file, find the line that contain “blowfish_secret”, and modify like below.

$cfg['blowfish_secret'] = ‘TypeAnything_for_Secure’;

9. Restart the httpd service

# /etc/init.d/httpd restart

10. Enter the URL http://[IP Address]/phpMyAdmin/ on Firefox browser, we’ll can see the login web page.

http://localhost/phpMyAdmin

After inputting the root user and its password(eaziweb), we can use phpMyAdmin to manage the MySQL.

Errors

1. 404 Not Found Error

Please make sure you push your phpMyAdmin directory in your webroot. In my case it’s /var/www/html

cp -r phpMyAdmin/ /var/www/html/

2. 403 Forbidden Error

I spend good amount of time finding why access is forbidden and finally did following setting

2.1 Go to /etc/httpd/conf.d/
2.2 vi phpMyAdmin.conf
2.3 Add following lines

Order allow,deny
Options Indexes
Allow from all

Still not able to access, try disabling the SElinux

SElinux is extra security layer in Linux and sometimes it provide conflicts for apache to work

vi /etc/selinux/config

Modify SELINUX=enforcing  to SELINUX=disabled  //Discuss with your senior. Mine is test server.

Restart your machine

hit http://localhost/phpMyAdmin prompt for username/password for mysql login 

Please note all the steps executed via root credentials . You can use su command to login as root and carry the same steps.

Google Map V3 - Get Langitude and Latitude on mouseover

• First an object representing google map properties is created with zoom level, map center and map type.
• Then a map object is created. It takes two parameters. One is the div where the map should be displayed and the other is the object which contains various properties to initialize the google map.
• With the above to lies the map can be displayed.
• Next are the two event handlers which will display the lattitude and longitude when the move is moved over the google map or when the mouse is clicked on the map.
• The event listener needs three parameters first is the map object, next is the event like onmousemove or onclick and the third parameter is the callback function to which the coordinates are passed as a parameter.
• Each time the event handlers (callback functions) are called i am updating the lattitude and longitude.

Please visit http://ecarobar.com/google-map-v3-get-langitude-and-latitude-on-mouseover/ for code and details

For live demo check here http://www.ecarobar.com/google/

Get Latitude and Longitude with Google Maps V3

I would like to share with you a little piece of code that I find quite useful in my applications. I do create lots of guides that require a small utility to find out the latitude and longitude of a business location from a control panel in order to display the maps appropiately on the Web. Here I will do my best to explain a step procedure on how to do that -once you know the procedure, it is easy to create plugins or whatever you wish to do.

Step 1

 First of all, lets make a reference to the new version of Google Maps. Check that we have to specify a parameter sensor=false. To find out more about this parameter please follow this link.

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">script>




Step 2



Now we are going to write the HTML tags on the BODY of our document that will hold the map and the controls that will hold latitude, longitude and zoom level references. Also, see the CSS that control the size of the map holder.




<style>

div#gmap {

width: 100%;

height: 300px;

}

style>

<body>

<center>

<div id="gmap">div>

lat:<span id="lat">span> lon:<span id="lon">span><br/>

zoom level: <span id="zoom_level">span>

center>

body>




Step 3

Now, we are going to write the function that will display the map when the document loads. The function, that we will call ‘initialize’ has different parts that we will describe now:



Part 1

Setting the map zoom level and its position in the world:


var myLatlng = new google.maps.LatLng(38.971154274048345,1.415863037109375); // IBIZA http://www.ramirezcobos.com/wp-includes/images/smilies/icon_smile.gif" alt=":)" class="wp-smiley">

var myOptions = {

zoom: 16,

center: myLatlng,

mapTypeId: google.maps.MapTypeId.ROADMAP

}

map = new google.maps.Map(document.getElementById("gmap"), myOptions);

Part 2

Placing a marker on the map specifying its center position (please refer to above code for LatLon location).

// marker refers to a global variable

marker = new google.maps.Marker({

position: myLatlng,

map: map

});

Part 3

Now, the events that will take control of the marker center re-positioning and placing the information on the correspondent document objects (lat, lon, and zoom level).

// if center changed then update lat and lon document objects                          
google.maps.event.addListener(map, 'center_changed', function() {                      
var location = map.getCenter();                                                        
document.getElementById("lat").innerHTML = location.lat();                             
document.getElementById("lon").innerHTML = location.lng();                             
// call function to reposition marker location                                         
placeMarker(location);                                                                 
});                                                                                    
// if zoom changed, then update document object with new info                          
google.maps.event.addListener(map, 'zoom_changed', function() {                        
zoomLevel = map.getZoom();                                                             
document.getElementById("zoom_level").innerHTML = zoomLevel;                           
});                                                                                    
// double click on the marker changes zoom level                                       
google.maps.event.addListener(marker, 'dblclick', function() {                         
zoomLevel = map.getZoom()+1;                                                           
if (zoomLevel == 20) {                                                                 
zoomLevel = 10;                                                                        
}                                                                                      
document.getElementById("zoom_level").innerHTML = zoomLevel;                           
map.setZoom(zoomLevel);                                                                
});                                                                                    




Part 4

Initialize the document objects with default information

document.getElementById("zoom_level").innerHTML = 16;

document.getElementById("lat").innerHTML = 38.971154274048345;

document.getElementById("lon").innerHTML = 1.415863037109375;

Step 4

Finally, we have to write the function that will reposition the marker on ‘zoom_changed’ map event and call the ‘initialize’ function on window load event.



function placeMarker(location) {

var clickedLocation = new google.maps.LatLng(location);

marker.setPosition(location);

}

window.onload = function(){initialize()};

And that’s it, we have a great utility to plug onto our projects in order to find out the latitude and longitude of an address.









Finally! The Live Demo

lat: lon:

zoom level:

All code in single File

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
    "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Get Lat Lon Finder</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">

<style type="text/css">
body {
    margin: 0;
    padding: 0;
    font-family: "Gill sans", sans-serif;
    background-color: #fff;
    color: #000;
}
div#bd {
    position: relative;
}
div#gmap {
    width: 100%;
    height: 500px;
}
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var map;
var marker=false;
function initialize() {
   
  var myLatlng = new google.maps.LatLng(38.909017951243754,1.4319777488708496);
  var myLatlng = new google.maps.LatLng(34.49648586452719,73.35619300603867); //for my home
 
  var myOptions = {
    zoom: 19,
    center: myLatlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }
 
  map = new google.maps.Map(document.getElementById("gmap"), myOptions);
 
  marker = new google.maps.Marker({
          position: myLatlng,
          map: map
      });
   
  google.maps.event.addListener(map, 'center_changed', function() {
      var location = map.getCenter();
    document.getElementById("lat").innerHTML = location.lat();
    document.getElementById("lon").innerHTML = location.lng();
    placeMarker(location);
  });
  google.maps.event.addListener(map, 'zoom_changed', function() {
      zoomLevel = map.getZoom();
    document.getElementById("zoom_level").innerHTML = zoomLevel;
  });
  google.maps.event.addListener(marker, 'dblclick', function() {
    zoomLevel = map.getZoom()+1;
    if (zoomLevel == 20) {
     zoomLevel = 10;
       }  
    document.getElementById("zoom_level").innerHTML = zoomLevel;
    map.setZoom(zoomLevel);
   
  });
 
  document.getElementById("zoom_level").innerHTML = 14;
  document.getElementById("lat").innerHTML = 38.909017951243754;
  document.getElementById("lon").innerHTML = 1.4319777488708496;
}
 
function placeMarker(location) {
  var clickedLocation = new google.maps.LatLng(location);
  marker.setPosition(location);
}
window.onload = function(){initialize();};

</script>
</head>
<body>
<center>
    <div id="bd">
        <div id="gmap"></div>
        lat:<span id="lat"></span> lon:<span id="lon"></span><br/>
        zoom level: <span id="zoom_level"></span>
    </div>
</center>
</body>
</html>

Special Thanx to for code conversion
http://qualitypointtech.net/encode/index.php
http://www.ramirezcobos.com/2010/01/22/get-latitude-and-longitude-with-google-maps-v3/