If you are getting this error while running npm install, then you are not having write permission on .npm directory.
To get the ownership of this directory run following command
|
1 |
sudo chown -R $(whoami) ~/.npm |
Also we need to give write permission to node_modules directory
|
1 |
sudo chown -R $USER /usr/local/lib/node_modules |
ref – http://stackoverflow.com/questions/16151018/npm-throws-error-without-sudo
I was getting this error in my error log, after searching for solutions online I stumbled upon this solution that worked for me. I am writing this post for my personal reference, it would be great if someone gets benefited by this.
To install Mcrypt PHP extension on Ubuntu / Debian run following command ( this step is same for Nginx and apache )
|
1 |
<span class="pln">sudo apt</span><span class="pun">-</span><span class="kwd">get</span><span class="pln"> install php5</span><span class="pun">-</span><span class="pln">mcrypt</span> |
This will create a mcrypt module in /etc/php5/mods-available directory. If it doesnt we need to create symlink for this.
|
1 |
<span class="pln">sudo ln </span><span class="pun">-</span><span class="pln">s </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">php5</span><span class="pun">/</span><span class="pln">conf</span><span class="pun">.</span><span class="pln">d</span><span class="pun">/</span><span class="pln">mcrypt</span><span class="pun">.</span><span class="pln">ini </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">php5</span><span class="pun">/</span><span class="pln">mods</span><span class="pun">-</span><span class="pln">available</span><span class="pun">/</span><span class="pln">mcrypt</span><span class="pun">.</span><span class="pln">ini</span> |
Now enable mcrypt by running
|
1 |
<span class="pln">sudo php5enmod mcrypt</span> |
After this restart php5-fpm service by
|
1 |
<span class="pln">sudo service php5</span><span class="pun">-</span><span class="pln">fpm restart</span> |
There two ways you can upgrade or downgrade your VM instances.
a. Stop – configure – start
b. Minimum downtime ( by swapping the disk )
a. This is a very easy method to do this. The main disadvantage of this is, it requires downtime. If you are okay with a 5 – 10 minute of downtime then you can go with this method.
b. If you this to happen almost real time then follow these steps
If you have a Google cloud compute engine VM Instance and wants to upgrade or downgrade Continue reading
To connect your PHP 5.4 application to SQL Server 2012 database. I assume you have PHP 5.4 installed through Wamp Server ( 32 bit ) Continue reading
phpMyAdmin is a free and open source tool written in PHP intended to handle the administration of MySQL or MariaDBwith the use of a web browser. It can perform various tasks such as creating, modifying or deleting databases, tables,fields or rows; executing SQL statements; or managing users and permissions. source: wikipedia
To access remote mysql database from your local phpmyadmin, open config.inc.php file by
|
1 |
sudo nano /etc/phpmyadmin/config.inc.php |
Add following line
|
1 2 3 4 5 |
$i++; $cfg['Servers'][$i]['host'] = 'ip-address-of-db-server'; //provide hostname and port if other than default $cfg['Servers'][$i]['user'] = 'my_db_user'; //user name for your remote server $cfg['Servers'][$i]['password'] = 'password'; //password $cfg['Servers'][$i]['auth_type'] = 'config'; // keep it as config |
You can refer this article to install phpmyadmin on Ubuntu: http://devendraverma.com/install-phpmyadmin-on-ubuntu/
To add Splash Screen to you android application
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 |
package co.laterbox.laterbox; /** * Created by deven on 26/8/15. */ import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Handler; public class SplashScreen extends Activity { // Splash screen timer private static int SPLASH_TIME_OUT = 3000; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_splash); new Handler().postDelayed(new Runnable() { /* * Showing splash screen with a timer. This will be useful when you * want to show case your app logo / company */ @Override public void run() { // This method will be executed once the timer is over // Start your app main activity Intent i = new Intent(SplashScreen.this, MainActivity.class); startActivity(i); // close this activity finish(); } }, SPLASH_TIME_OUT); } } |
AndroidManifest.xml
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 |
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="co.laterbox.laterbox" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17"/> <!-- GCM Permissions - Start here --> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <uses-permission android:name="android.permission.WAKE_LOCK" /> <permission android:name="co.laterbox.pushnotification.permission.C2D_MESSAGE" android:protectionLevel="signature" /> <uses-permission android:name="co.laterbox.pushnotification.permission.C2D_MESSAGE" /> <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.VIBRATE" /> <!-- GCM Permissions - End here --> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> <!-- Splash screen --> <activity android:name=".SplashScreen" android:label="@string/app_name" android:screenOrientation="portrait" android:theme="@android:style/Theme.Black.NoTitleBar" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="co.laterbox.laterbox.MAINACTIVITY" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> <!--<activity--> <!--android:name=".MainActivity"--> <!--android:label="@string/app_name" >--> <!--<intent-filter>--> <!--<action android:name="android.intent.action.MAIN" />--> <!--<category android:name="android.intent.category.LAUNCHER" />--> <!--</intent-filter>--> <!--</activity>--> <receiver android:name=".GcmBroadcastReceiver" android:permission="com.google.android.c2dm.permission.SEND" > <intent-filter> <action android:name="com.google.android.c2dm.intent.RECEIVE" /> <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> <category android:name="co.laterbox.pushnotification" /> </intent-filter> </receiver> <!-- Register Service --> <service android:name=".GCMNotificationIntentService" /> </application> </manifest> |
activity_splash.xml
|
1 2 3 4 5 6 7 8 |
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/splash_image" android:orientation="vertical" android:weightSum="1"> </RelativeLayout> |
Output
In order to use Click to Deploy with Google Compute Engine you need to make sure “Google Cloud Deployment Manager API” is enabled on your project. You can enable this API from Developer console->APIs page.
Moreover, if you have multiple accounts added in your browser try using Chrome Incognito tab to login in order to make sure your email has the right permissions.
To remove # from Angular JS application built with Laravel , add following line in your config.
|
1 |
$locationProvider.html5Mode(true); |
Add this in your head tag
|
1 |
<base href="/"> |
Now it will work fine till you do not refresh the page. If you refresh your page at this point, you will see page not found error, it is because now browser sends request to server and server doesn’t have the route.
To do this we will add this route at the end of routes.php
|
1 2 3 4 |
Route::any('{path?}', function() { return File::get(public_path().'/index.html'); })->where("path", ".+"); |
To serve all request on https in Google App Engine, add following entry to your app.yaml file
|
1 2 3 |
- url: .* script: main.app secure: always |
For application developed in Laravel use following lines instead.
|
1 2 3 |
- url: /.* script: public/index.php secure: always |
To enable Password Authentication
Open file etc/ssh/sshd_config by
|
1 |
sudo nano etc/ssh/sshd_config |
Search for PasswordAuthentication no, just change this to
|
1 |
PasswordAuthentication yes |
To set root password
|
1 |
sudo passwd root |
it will ask for new root password and confirm root password. To test this logout from current session and try to login using root as user and password that you have just assigned.
After fresh installation of Laravel 5.1, it was not showing up the welcome page. Further investigating into this issue revealed that “storage” directory is not writable.
To make storage directory writable run following commands
|
1 2 |
find storage -type d -exec chmod 777 {} \; |
Then run:
|
1 |
find storage -type f -exec chmod 777 {} \; |
Geary is an IMAP mail client for GNOME 3.
Geary recently released their new version 0.10, with various improvements. To update geary to new updated version add Yorba ppa.
|
1 2 |
sudo add-apt-repository ppa:yorba/ppa sudo apt-get update && sudo apt-get install geary |
Restart geary and you will see an updated version of geary.
I installed node js and gulp, but once i tried to run gulp from terminal I am getting
“/usr/bin/env: node: No such file or directory”
Run the following command to resolve this issue
sudo apt-get install nodejs-legacy
When I was installing Android Studio on Ubuntu this error occurred which halted the installation
|
1 |
Unable to run mksdcard SDK tool |
It happened twice and I thought sharing this might help others. It got resolved by running following command.
|
1 |
sudo apt-get install lib32stdc++6 |
I was installing android studio on ubuntu and come across this error.
|
1 2 |
'tools.jar' is not in the Android Studio classpath. Please ensure JAVA_HOME points to JDK rather than JRE. |
After lots of searching I found this simple soutuion that worked for me.
This is caused by having JAVA JRE installed as opposed to JAVA JDK. Installing JDK resolve the problem.
|
1 |
sudo apt-get install openjdk-7-jdk |
Simply:
|
1 2 |
git reset --hard origin/master |
Assuming that “origin/master” is your remote branch you want to reset to. This updates your local HEAD branch to be the same revision as origin/master, and --hard will sync this change into the index and workspace as well.
ref – http://stackoverflow.com/questions/9210446/replace-local-branch-with-remote-branch-entirely
To install composer on Ubuntu
|
1 2 |
curl -s http://getcomposer.org/installer | php sudo mv composer.phar /usr/local/bin/ |
Create an alias to call it by typing ‘composer’
|
1 |
alias composer='/usr/local/bin/composer.phar' |
If you are getting this error while running
|
1 |
sudo apt-get update |
To resolve this problem, run following commands
|
1 2 |
sudo rm /var/lib/apt/lists/* -vf sudo apt-get update |
|
1 2 3 |
git branch -m old_branch_name new_branch_name # This will rename branch locally git push origin :old_branch_name # This will delete the old branch from remote repository git push --set-upstream origin new_branch_name # Push the new branch, set local branch to track the new remote |
To get query string value in an url, for example to get ‘user_id’ value from an url
http://getquerystringparams.com?user_id=123456&msg_id=56
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
function GetQueryStringParams(sParam) { var queryStringValue; $.each(document.location.search.substr(1).split('&'), function(c,q){ var i = q.split('='); if(i[0].toString() == sParam) { queryStringValue = i[1].toString(); } }); return queryStringValue; } var gcm_id = GetQueryStringParams('user_id'); |
If you encounter this error, it indicates that your environment variables are not properly set. We will add these environment variables by editing “.profile” file present in your home directory.
If you have installed android sdk through Android Studio, it is likely to be present in /home/your_user_name/Android/sdk, otherwise in /home/your_user_name/android-sdk-linux.
If you have installed it through android studio then add following line in your “.profile” file
export ANDROID_HOME=$HOME/your_user_name/Android/sdk
else add this
$ export ANDROID_HOME=~/android-sdk-linux
Then add the paths to the platform-tools and tools sub-directories
export PATH=$ANDROID_HOME/tools:$PATH
export PATH=$ANDROID_HOME/platform-tools:$PATH
You should now be able to run android from the shell. Note that you might need to reopen the terminal to make it work
Node JS can be installed using various methods, but in this post I am going to show you how to install it using NVM (Node Version Manager)
To install NVM through curl
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.25.1/install.sh | bash
or Wget:
wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.25.1/install.sh | bash
The script clones the nvm repository to ~/.nvm and adds the source line to your profile (~/.bash_profile, ~/.zshrc or ~/.profile).
After this restart PC / VPS to make command NVM available. You will get list of options when you type NVM in your terminal.
Now you can run
nvm install version_name
at the time of writing, latest version of nodejs is 0.12.3. So this can be
nvm install 0.12.3
dev@devenubuntu:~$ nvm install 0.12.3
######################################################################## 100.0%
Now using node v0.12.3 (npm v2.9.1)
You can verify the installation by running
dev@devenubuntu:~$ node -v
v0.12.3
(this post is just for a personal reference)
If it locks up completely, you can REISUB it, which is a safer alternative to just cold rebooting the computer.
REISUB by:
While holding Alt and the SysReq (Print Screen) keys, type REISUB.
R: Switch to XLATE mode
E: Send Terminate signal to all processes except for init
I: Send Kill signal to all processes except for init
S: Sync all mounted file-systems
U: Remount file-systems as read-only
B: Reboot
REISUB is BUSIER backwards, as in “The System is busier than it should be”, if you need to remember it. Or mnemonically – R eboot; E ven; I f; S ystem; U tterly; B roken.
In case you like mnemonics: Raising Elephants Is So Utterly Boring, or Reboot Event If System Utterly Broken. I’ve also seen it as RSEIUB (Raising Skinny Elephants is Utterly Boring)
Reference: http://askubuntu.com/questions/4408/what-should-i-do-when-ubuntu-freezes?page=1&tab=votes#tab-top
Ubuntu has an error reporting system called apport which tries to catch all program crashes in the background and report them to help the developers.
It seems that after a dist-upgrade there are stuck some reports that are tried to be resubmitted somehow, but disabling apport is not a desirable solution.
Open a terminal and remove all old crash-reports that might exist in the crash-report directory:
|
1 2 |
sudo rm /var/crash/* |
After a reboot the popups are gone.
If you don’t want to reboot, you can close all open popups with:
|
1 2 |
killall system-crash-notification |
(Any further new pop-ups still should be investigated. If you want to see the details,
look in /var/crash/ for any new reports)
Ref : http://askubuntu.com/a/369297
Ionic is a beautiful, open source front-end SDK for developing hybrid mobile apps with HTML5. ( from ionic website)
AngularJS is a JavaScript framework. It can be added to an HTML page with a <script> tag. AngularJS extends HTML attributes with Directives, and binds data to HTML with Expressions. ( From w3schools )
The IMDB movie search application
In this application we will accept movie name from user and send it to movie api. We will use The Open Movie Database (which is unofficial imdb api) to fetch movie details.
In this tutorial we will be using Ionic Card Showcase to show movie poster and other details like year of release, genre, actors etc. To fetch the movie information we will user Angular JS Factory.
Following is the codepen for this application
See the Pen Imdb Movie Search by Devendra Verma (@devendraverma) on CodePen.
To re size image in laravel we will use a library called Intervention.
Intervention Image is an open source PHP image handling and manipulation library. It provides an easier and expressive way to create, edit, and compose images and supports currently the two most common image processing libraries GD Library and Imagick. ( from their website)
So lets start with installation, the easiest way to install intervention is through composer. So run the following command in your terminal inside your application folder
composer require intervention/image
If it asks for specify version to be installed, add current stable version for this I will enter 2.1.2 (which is latest version at the time of writing this post) .
After you have installed Intervention Image, open your Laravel config file config/app.php and add the following lines.
In the $providers array add the service providers for this package.
‘Intervention\Image\ImageServiceProvider’
Add the facade of this package to the $aliases array.
‘Image’ => ‘Intervention\Image\Facades\Image’
Now the Image Class will be auto-loaded by Laravel.
Now we are done with the installation part, lets create a route to test our image re sizing.
// usage inside a laravel route
Route::get(‘/’, function() {
$img = Image::make(‘foo.jpg’)->resize(300, 200);
return $img->response(‘jpg’);
});
This will resize the provided image into 300 * 200 jpeg image. There some other options also, lets see them.
// To resize only the width of the image
$img->resize(300, null);
// To resize only the height of the image
$img->resize(null, 200);
// To resize the image to a width of 300 and constrain aspect ratio (auto height)
$img->resize(300, null, function ($constraint) {
$constraint->aspectRatio();
});
// To resize the image to a height of 200 and constrain aspect ratio (auto width)
$img->resize(null, 200, function ($constraint) {
$constraint->aspectRatio();
});
Besides image resize, intervention provides whole lot of functions to perform image manipulation. No matter if you want to create image thumbnails, watermarks or format large image files Intervention Image helps you to manage every task in an easy way with as little lines of code as possible.
I found following commands on stackoverflow, which i used to install image magic on ubuntu 14.04 (this post is just for personal reference)
sudo apt-get update
sudo apt-get install imagemagick php5-imagick
To update express.js globally run this command in terminal
$ npm update express -g
Now to verify, run the following command
$ npm list -g –depth=0
/usr/local/lib
├── cordova@4.2.0
├── express@4.12.2
├── express-generator@4.12.1
├── ionic@1.3.11
├── n@1.2.13
└── npm@2.5.1
Sometimes Ubuntu stops showing time in Unity Panel, after some search, following command worked for me (This post is kind of a future reference)
sudo killall unity-panel-service
ref: stackoverflow.com
Do install Teamviewer 9 on your Ubuntu 14.04 box, following these steps
1. Download it
|
1 |
wget http://www.teamviewer.com/download/teamviewer_linux.deb |
2. Install gdebi (GDebi can install local .deb packages with automatic dependency resolution (it automatically downloads and installs the required packages)
|
1 |
sudo apt-get install gdebi |
3. In the same directory you download the .deb file just run
|
1 |
sudo gdebi teamviewer_linux.deb |
ref: http://iqbalnaved.wordpress.com/2014/01/04/installing-teamviewer-9-on-64-bit-ubuntu-13-10/
I was working with Mandrill api to send emails, to track the emails I needed to add smtp header. Here is how you can add smtp header to emails.
|
1 2 3 4 5 |
Mail::send('emails.welcome', $data, function($message) { $message->getHeaders()->addTextHeader('X-MC-Tags', 'welcome email'); $message->to('foo@example.com', 'John Smith')->subject('Welcome!'); }); |
To delete files which are visible in git status can be deleted by using this simple command
|
1 |
git add -u |
You can use these commands also
|
1 |
git rm $(git ls-files --deleted) |
This will ONLY remove the deleted files from the git.
It could be also be used for adding ONLY modified files also.
|
1 |
git add $(git ls-files --modified) |
These commands also works on gitbash for windows.
ref: stackoverflow.com
To find a listener on a port, do this:
|
1 |
etstat -tln |
You should see a line that looks like this if mysql is indeed listening on that port.
|
1 |
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN |
reference: stackoverflow.com
Open your terminal and run following command
|
1 |
sudo apt-get install curl libcurl3 libcurl3-dev php5-curl |
and then restart apache
|
1 |
sudo service apache2 restart |
% kill %3
to kill job number 3, which will cause it to exit prematurely.
If you get stuck or are in a hurry you can use the logout command twice in a row and you’ll be able to log out in spite of your stopped jobs. The jobs will be killed automatically by the shell. You really should clean them up yourself though.
If you have background jobs running (as opposed to stopped jobs) they will continue to run after you log out.
source: http://www.math.udel.edu/teaching/manual/node36.html
Jquery autocomplete adds the ui-autocomplete-loading class (for the duration of the loading) that can be used show a loading icon. just add this
|
1 |
.ui-autocomplete-loading { background:url('img/indicator.gif') no-repeat right center } |
Meteor comes with an authentication system , which supports login with external services like
Meteor also provides forms for login, signup, password change, and password reset. To add the accounts and login controls in your application you need to add ‘account-ui’ package in your application
|
1 |
meteor add accounts-ui |
Now to add login support from one of the above listed external services, you just need to run this command
|
1 |
meteor add accounts-github |
Now you will see, it will guide you through the required configuration. Similarly you can add other services also. To show the login buttons on our webpage we need to add
|
1 |
{{loginButtons align="right"}} |
in our html file.
You’re also not allowed to call remove({}) from any client side code. If your app accumulates a bunch of crufty data while you’re prototyping, you might be sad about this. Client side code and the console fall under the concept “Untrusted Code” introduced by Meteor in 0.5.8.
“Trusted Code” includes the server code and method code. The key to the solution is that you can call methods defined on the Meteor server from the client using the Meteor.callmethod. Therefore, this will work in the console
|
1 |
Meteor.call('removeAllPosts') |
Assuming you define removeAllPosts on the server like so
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
if (Meteor.isServer) { Meteor.startup(function() { return Meteor.methods({ removeAllPosts: function() { return Posts.remove({}); } }); }); } |
Source: http://gaslight.co/blog/how-to-remove-all-elements-from-a-meteor-collection
Use Buildpack
https://github.com/winglian/heroku-buildpack-php
Download Heroku client tool
Try by typing heroku in command prompt
Log into Heroku
|
1 |
$heroku login |
enter your account username and password
Now neter
|
1 |
$ heroku create budget--buildpack git://github.com/winglian/heroku-buildpack-php.git#mpm-event-php55-fpm |
This buildpack also supports custom Document Roots in your application. Simply add an environment variable. If your document root is public in the root of your repo, then run
|
1 |
$ heroku config:set WWWROOT=/public |
To list available packages use
|
1 |
meteor list |
To list installed packages use
|
1 |
meteor list --using |
You should add your needed autoload directory to the ClassLoader::addDirectories array under /app/start/global.php. Laravel gives multiple ways to accomplish the same thing depending on your personal needs. (source: stackoverflow, this is just for my personal reference)
While installing Laravel via composer on Wamp server I got this error
You must enable the openssl extension to download files via https
To resolve this issue, go to
c:/wamp/bin/php/{your php version} and open php.ini file. Uncomment the line by removing the semi colon in front of it
extension=php_openssl.dll
restart all service, it should work. Remember do not edit php.ini file from Wamp UI because it edits apache’s php.ini file.
To check if the Jquery is loaded or not and version of the loaded Jquery, use following code snippet( found it on stackoverflow)
|
1 2 3 4 |
if (typeof jQuery != 'undefined') { // jQuery is loaded => print the version alert(jQuery.fn.jquery); } |
To add a new column to an existing table after specific column user ‘after’ using Schema builder in Laravel 4
|
1 2 3 4 |
Schema::table('users', function(Blueprint $table) { $table->string('newColumn', 100)->after('existingColumn'); }); |
In Unix systems the end of a line is represented with a line feed (LF). In windows a line is represented with a carriage return (CR) and a line feed (LF) thus (CRLF). when you get code from git that was uploaded from a unix system they will only have a LF. It’s nothing to worry about.
— (stackoverflow)
To deactivate this use following command
|
1 |
git config core.autocrlf false |
Apache shows this error message when you don’t have mod_rewrite enabled. To enable it follow below steps
1. cd to apache2 (usually in cd /etc/apache2 )
2. enter this command – sudo a2enmod rewrite
3. now restart the apache service – sudo service apache2 restart
That’s it !
I need to manually reset the brightness setting on each restart on my Ubuntu desktop, I found following solution mentioned on stackoverflow.
To see the current settings,
|
1 2 3 |
$ cat /sys/class/backlight/intel_backlight/max_brightness 4882 |
then I modified the code in /etc/rc.local
|
1 2 |
$ gksudo gedit /etc/rc.local |
——- BEGIN FILE —————————–
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
#!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. echo 4882 > /sys/class/backlight/intel_backlight/brightness exit 0 |
——- END FILE —————————–
Ref – http://askubuntu.com/questions/151651/brightness-is-reset-to-maximum-on-every-restart
I have installed Phpmyadmin on my Ubuntu Server, but while accessing it I am getting
The requested URL /phpmyadmin was not found on this server.
Error message, I have found following solution which worked for me.
Include /etc/phpmyadmin/apache.conf
sudo /etc/init.d/apache2 restart(As an alternative to step 2, you can command
|
1 2 |
sudo service apache2 restart |
)
To enable it the rewrite module, run “apache2 enable module rewrite”:
|
1 2 |
sudo a2enmod rewrite |
You need to restart the webserver to apply the changes:
|
1 2 |
sudo service apache2 restart |
If you plan on using mod_rewrite in .htaccess files, you also need to enable the use of .htaccess files by changing AllowOverride None to AllowOverride FileInfo. For the default website, edit/etc/apache2/sites-available/default:
|
1 2 3 4 5 6 7 |
<Directory /var/www/> Options Indexes FollowSymLinks MultiViews # changed from None to FileInfo AllowOverride FileInfo Order allow,deny allow from all </Directory> |
After such a change, you need to restart Apache again.
Ref: http://askubuntu.com/questions/48362/how-to-enable-mod-rewrite-in-apache
While installing New Relic‘s server monitoring on my Ubuntu server. After entering following command given at New Relics installtion instrcutions
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deb http://apt.newrelic.com/debian/ newrelic non-free |
I was getting this this error “deb command no found”, after searching for solution on internet I found following answer
Deb is not a command. You need to edit your /etc/apt/sources.list file and add the line
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deb deb http://apt.newrelic.com/debian/ newrelic non-free |
to the end of the file.
To check if Mysql is running on the server
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sudo netstat -tap | grep mysql |
To remove mysql completely from Ubuntu type in terminal
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sudo apt-get remove --purge mysql-server mysql-client mysql-common sudo apt-get autoremove sudo apt-get autoclean |
While trying to install apache with
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sudo apt-get install apache2 |
It gives
user_name is not in the sudoers file. This incident will be reported.
To add a user in sudoers file
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echo 'user_name ALL=(ALL) ALL' >> /etc/sudoers |
To replace a character or word in Jquery,
suppose we have following string
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var str = "I love PHP"; |
Now we want to change “PHP” to “Programming”
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str = str.replace('PHP', 'Programming'); |
To get the text of selected option of a dropdown in Jquery,
For example following is the dropdown containing cities
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<select name='city' id='city'> <option value='1'>Mumbai</option> <option value='2'>New Delhi</option> </select> |
to get the text of the selected option, in JQuery
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$("#cities option:selected").text(); |
According to Meteor documentation, you can easily install it by using following command in your terminal
$ curl https://install.meteor.com | /bin/sh
To create a Meteor application simply run
$ meteor create myapp
To run your application
$ cd myapp $ meteor Running on: http://localhost:3000/
Now you can view your application at
http://localhost:3000
A quick refrence for Laravel artisan commands for database migration
Create a migration
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php artisan migrate:make create_users_table |
Create a migration with table name
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php artisan migrate:make create_users_table --table=users --create |
To run the migration
|
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php artisan migrate |
To rollback last migration
|
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php artisan migrate:rollback |
To rollback all migrations
|
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php artisan migrate:reset |
Rollback all migrations and run them again
|
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php artisan migrate:refresh |
Database seeding
|
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php artisan db:seed |
To access the variables defined in the applocation/config/config.php in the other places in your application,
|
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$this->config->item('item name'); |
for example I have declared on config item called ‘api_key’ in our config file
|
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$config['api_key'] = '12345678'; |
to access this in your controller or views
|
1 |
echo $this->config->item('api_key'); |
Following code snippet will convert decimal latitude and longitude into degree, min and sec
|
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function DECtoDMS(dd) { var vars = dd.split('.'); var deg = vars[0]; var tempma = "0."+vars[1]; tempma = tempma * 3600; var min = Math.floor(tempma / 60); var sec = tempma - (min * 60); return deg+"-"+min+"-"+sec; } var inDeg = DECtoDMS(72.8479400); |
To convert a latitude and longitude in degree min sec to decimal
|
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function DMStoDEC(deg, min, sec) { return $deg+(((min*60)+(sec))/3600); } var res = DMStoDEC('72', '55', '52'); |
I have been trying to figure out to install Laravel 4 on a shared hosting, but there was not enough information available for this, so I talked with people in Laravel IRC and install the Laravel 4 on a shared hosting by only exposing public content and hiding application files.
Normally on Linux shared hosting we have following directory structure
/home/account-name
|- accesss-logs
|- etc
|- public_ftp
|- public_html
|- www
Whatever we save under public_html folder becomes available for world. In the Laravel documentation it has been mentioned that we should upload application files outside public folder.
Note: Laravel is designed to protect your application code, and local storage by placing only files that are necessarily public in the public folder. It is recommended that you either set the public folder as your site’s documentRoot (also known as a web root) or to place the contents of public into your site’s root directory and place all of Laravel’s other files outside the web root.
So, now cut paste all the contents of public folder in the root of your application, If you are working on Xampp your path will be
|
1 |
c:\\xampp\htdocs\your-application-name |
Now we need to upload all these files on server, for this create a folder
|
1 |
/home/your-count-name |
say your folder name is “your-application”, after this upload app, bootstrap, packages, vendor in this directory. Now upload all remaining files in
|
1 |
/home/your-account-name/public_html |
So far so good, the only remaining task is to change the paths, open index.php files under
public_html/index.php
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/* |-------------------------------------------------------------------------- | Register The Auto Loader |-------------------------------------------------------------------------- | | Composer provides a convenient, automatically generated class loader | for our application. We just need to utilize it! We'll require it | into the script here so that we do not have to worry about the | loading of any our classes "manually". Feels great to relax. | */ require __DIR__.'/../your-application-name/bootstrap/autoload.php'; /* |-------------------------------------------------------------------------- | Turn On The Lights |-------------------------------------------------------------------------- | | We need to illuminate PHP development, so let's turn on the lights. | This bootstraps the framework and gets it ready for use, then it | will load up this application so that we can run it and send | the responses back to the browser and delight these users. | */ $app = require_once __DIR__.'/../your-application-name/bootstrap/start.php'; |
We need to change the path in one more file to configure public folder path. Now open a file in
/home/account-name/your-application-name/bootstrap/paths.php
|
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/* |-------------------------------------------------------------------------- | Public Path |-------------------------------------------------------------------------- | | The public path contains the assets for your web application, such as | your JavaScript and CSS files, and also contains the primary entry | point for web requests into these applications from the outside. | */ 'public' => __DIR__.'/../../public_html', |
Since, we have pasted all our files in public folder in this directory, we are mentioning this path to locate public files of our application.
that’s it, now open this in your browser and you will see the default welcome page.
To remove “index.php” from codeigniter url
Open application/config/config.php file and look for following section in the file
|
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/* |-------------------------------------------------------------------------- | Index File |-------------------------------------------------------------------------- | | Typically this will be your index.php file, unless you've renamed it to | something else. If you are using mod_rewrite to remove the page set this | variable so that it is blank. | */ $config['index_page'] = 'index.php'; |
Remove the index.php and save the file
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$config['index_page'] = ''; |
Now create an .htaccess file and paste following lines
|
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RewriteEngine On RewriteCond %{REQUEST_URI} ^/system.* RewriteRule ^(.*)$ index.php?/$1 [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.+)$ index.php?/$1 [L] |
Save this file into root directory of your project, after creating this file restart your web server.
Recently in one of my project, I happened to use Cookie in Jquery. So, I though it would helpful for future references and to others also.
To set, read and delete cookie in Jquery I found this plugin very useful, you can download this from here,
http://plugins.jquery.com/cookie/
First include this plugin on your page by
|
1 |
<script src="js/jquery.cookie.js"></script> |
To set a cookie
|
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$.cookie("cookie_name", "123"); |
first parameter is the name of the cookie, which we will use further to read / delete, second parameter is the value for this cookie.
If we want a cookie to get expire after a time interval, we do this by setting time limit
|
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$.cookie("cookie_name", "123", { expires : 5 }); |
Now this cookie will get expired after 5 days.
To read a cookie’s value, just pass the cookie name
|
1 |
var cookie_value = $.cookie("cookie_name"); |
To delete a cookie
|
1 |
$.removeCookie("cookie_name"); |
If you want to redirect using htaccess, add following lines in the htacess files
|
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RewriteEngine on RewriteCond %{HTTP_HOST} ^yourwebsite\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.yourwebsite\.com$ RewriteRule ^(.*)$ "https\:\/\/yourwebsite\.com\/$1" [R=301,L] |
We can also redirect using php code in out header file
|
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if($_SERVER["HTTPS"] != "on") { header("Location: https://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"]); exit(); } |
To redirect from cPanel,
Log into your websites control panel, then go to “Domains” section. Click on “Redirects” option
– Select type “Permanent (301)” from dropdown menu
– Select domain name which you want to redirect
– And finally enter the url to which you want the above select domain redirect to
To open a link in new tab, using Jquery, use window.open and pass the url
|
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('.redirect').click(function() { window.open('http://devendraverma.com/useful-git-resources/'); }); |
To download file through ftp / http which are password protected, use following command
|
1 |
$ wget --user=deven --password='123456' http://dropbox.com/mydoc.html |
This is my list of useful date formats in PHP for my own reference, I update it whenever I come across to new ones, so that I don’t need to search for it on web.
To get the Day of a date
|
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$date = "2013-04-22"; echo "Today is ".Date('l', strtotime($date)); |
To get a date in this format
22 April 2013
|
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$date = "2013-04-22"; echo "Today is ".Date('d F Y', strtotime($date)); |
To get, Jul 18
|
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$date = "2013-04-22"; echo "Today is ".Date('M d', strtotime($date)); |
Adding no of days to a PHP date, In this example we are adding 2 days to a PHP date
|
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$date = "2013-04-22"; echo date('Y-m-d', strtotime($date. ' + 2 days')); |
Using following code we can change the action attribute of the form and submit it
|
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$("form").attr("action", "/ControllerName/Method"); $("form").submit(); |
List of useful git resources, that I have come across.
37 single’s
https://37s.backpackit.com/pub/1465067
Git refcard on DZone
http://refcardz.dzone.com/refcardz/getting-started-git?uid=835453&nid=21049&token=08354531112134474811f
Git – the simple guide
http://rogerdudler.github.com/git-guide/
Git reference
Getting started about version control
http://git-scm.com/book/en/Getting-Started-About-Version-Control
Git in 15 minutes
Add other useful resources known to you in the comment below 🙂
To install FriendsApp on Ubuntu 12.10, follow these commands
|
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sudo add-apt-repository ppa:canonical-qt5-edgers/qt5-proper sudo add-apt-repository ppa:ubuntu-sdk-team/ppa sudo add-apt-repository ppa:super-friends/ppa sudo apt-get update sudo apt-get install friends-app unity-lens-friends |
It is much easier to install on Ubuntu 13.04, just use this one line command
|
1 |
sudo apt-get install friends-app |
It is very easy to install Git on Ubuntu, just use following command to install it,
|
1 |
sudo apt-get install git |
After download, you are ready to use Git !
To get the title of current page, there is a one line of JQuery code
|
1 |
$(document).attr('title'); |
To read the meta description of current, use following code
|
1 |
$('meta[name="description"]').attr('content'); |
To get the url of current page
|
1 |
$(location).attr('href'); |
phpMyAdmin is a free and open source tool written in PHP intended to handle the administration of MySQL with the use of a web browser. It can perform various tasks such as creating, modifying or deleting databases, tables, fields or rows; executing SQL statements; or managing users and permissions. (from Wikipedia)
To install Phpmyadmin, execute following command in your terminal
sudo apt-get install phpmyadmin
To see it working open your browser and type
http://localhost/phpmyadmin
Open your terminal and copy – paste following command
sudo add-apt-repository ppa:webupd8team/sublime-text-2
press enter, now update
sudo apt-get update
Now install by following command
sudo apt-get install sublime-text
Sublime text 2 is now installed on your computer, Happy coding 🙂
|
1 |
MySQL Workbench enables a DBA, developer, or data architect to visually design, model, generate, and manage databases. It includes everything a data modeler needs for creating complex ER models, forward and reverse engineering, and also delivers key features for performing difficult change management and documentation tasks that normally require much time and effort.
We will see how to install MySQL Workbench 5.2.44 from PPA using Olivier Berten’s PPA which is supported by the following distributions:
To install MySql Workbench, issue following commands
sudo add-apt-repository ppa:olivier-berten/misc
sudo apt-get update
sudo apt-get install mysql-workbench
When I shifted from Windows to Ubuntu, I was looking for a lightweight messenger. On Windows I was using IP Messenger, and was quit happy with it. After failed to install ip messenger available for Ubuntu, I settled for iptux.
Here is simple command to install iptux,
sudo apt-get install iptux
Here is the screenshot
