How to rebuild /etc/yum.repos.d in CentOS


If you remove all the files in /etc/yum.repos.d you may see this error. You can restore using the way below.

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
There are no enabled repos.
 Run "yum repolist all" to see the repos you have.
 To enable Red Hat Subscription Management repositories:
     subscription-manager repos --enable <repo>
 To enable custom repositories:
     yum-config-manager --enable <repo>

[22:09][~]# cat /etc/redhat-release
 CentOS Linux release 7.3.1611 (Core)

Check your version and reinstall using this way.

[22:09][~]# yum reinstall http://vault.centos.org/7.3.1611/os/x86_64/Packages/centos-release-7-3.1611.el7.centos.x86_64.rpm





 









How to Solve WordPress asked for FTP credentials
 







I know it is very annoying when you are going to install a PLUGIN in WordPress. I like the way, one click and install for PLUGINS and THEMES in WordPress. Here is the way that I’m using:


Edit your wp-config.php and add the line into it.


define('FS_METHOD','direct');




 









Why You Should Never Ever Buy XiaoMi Products ?
 




I’m not happy with their product, that’s why I write this article to let you know the service and the service policy of their product.

If you are using their product and is working fine, then you are good luck. If there is any problem with their product, you are in big trouble.


For personally, I do not like this brand, but I gave them a chance to try. I bought the model XiaoMi Mi A1 64GB Black on 11 November 2017 at IT City Fashion Island. Since this is the first Android One product from them, I use this for test for my APP development.

Most of the time I just put the phone on my office table and seldom use it unless I update and test for my APP.


Last week, 11 Feb 2019, I found out that the phone cover broken up, and I make a closer look and saw that is the battery expend the size and push the cover up. I’m feel lucky because the battery not yet explode.

So, I try to find out where is their service center. I found out that they do not have any official service center in here, so I have to take it back to the place that I purchase the phone for the service.


That time I passed to them, the LCD screen is still workable and the staff there turn off it and check it, and told me just need to change the battery. Then he charge me for 482 Baht. I thought it is the battery price at first.


So I provide the screenshots for the conversation, let you know what is going on.


















Some people said that it is reseller problem, but before that I’ve contacted the Service Company that listed in Xiao Mi Website, https://www.mi.com/th/support/repair/

They told me IT City is a drop point and will send to them for service.


Why I didn’t go to the service company directly ? First you need to understand the working hour traffics in Bangkok is terrible.

The location of the VST ECS is far from my place, around 30KM, and the IT City is just 10KM from my place, sure I chose to take to the drop point.




Conclusion


  • No matter they fix your phone or not, you will get charged, this is their policy.
  •  The battery maybe explode after a year of using period.
  •  They do not have official service center in here.
  •  They want to charge you more and ask you change for the LCD.
  •  If you never contact them, they will just put you aside until you contact them, they will never call you. 
  •  Their service is slow, it can take 2 weeks and 2 weeks.

 









How to disable AutoSave in WordPress ?
 




Sometimes we do not need the auto save function in the editor in WordPress, it will increase your database or slow down you editing experience while you are in slow internet connection.


Here is the solution to disable it, if you need to re-enable it just comment them away.


define( 'AUTOSAVE_INTERVAL', 60*60*60*24*365 ); // Set autosave interval to a year
define( 'EMPTY_TRASH_DAYS',  0 ); // Empty trash now: Zero days
define( 'WP_POST_REVISIONS', false ); // Do not save any revisions

 









Publishing Failed in WordPress
 




When you post in WordPress with over 5MB text post, you may receive this error with red color.


Publishing Failed



or you found in your php error log


PHP Fatal error:  Maximum execution time of 60 seconds exceeded in /home/nginx/domains/juzhax.com/public/wp-includes/formatting.php on line 2295




This is because WordPress need more time to execute and process and formatting your post over the maximum execution time.


You may use the way below to solve this.


Edit the file wp-config.php and add in the line





@ini_set('max_execution_time', 1800);



But, use this with caution, because if many of your script in WordPress over this time, this way maybe kill your server.

 









An error occurred while installing mysql2 (0.5.2), and Bundler cannot continue.
 




Gem files will remain installed in /var/www/discourse/vendor/bundle/ruby/2.5.0/gems/mysql2-0.5.2 for inspection.

Results logged to /var/www/discourse/vendor/bundle/ruby/2.5.0/extensions/x86_64-linux/2.5.0-static/mysql2-0.5.2/gem_make.out


An error occurred while installing mysql2 (0.5.2), and Bundler cannot continue.

Make sure that gem install mysql2 -v '0.5.2' --source 'https://rubygems.org/' succeeds before bundling.


In Gemfile:
   mysql2


I found the best way to solve the problem.


I think that you may missing the dev library of mysql:


On ubuntu


sudo apt-get install libmysqlclient-dev



On Red Hat/CentOS and other distributions using yum:


sudo yum install mysql-devel



On Mac OS X with Homebrew:


brew install mysql

 









`require’: cannot load such file — php_serialize (LoadError)
 




I’m running some of the Ruby script inside Docker and it show me this error.


The solution I use to solve it using the way below.


First, goto the path of your Gemfile


echo “gem ‘php-serialize'” >>Gemfile
 bundle install

 









File ./vendor/autoload.php missing or not readable. in centminmod phpMyAdmin
 




After installed the phpMyAdmin in centminmod, I saw this error message.



File ./vendor/autoload.php missing or not readable.

Most likely you did not run Composer to install library files.



I like to fix it manually and access to my server shell and run these command.


cd /usr/local/nginx/html/1111_mysqladmin12345
git pull
rm -rf composer.phar
wget -cnv https://getcomposer.org/composer.phar -O composer.phar
php composer.phar update --no-dev



To make sure every time update phpmyadmin and update the composer too, you should modify the file


/root/tools/phpmyadmin_update.sh


and add in these lines.


git pull
rm -rf composer.phar
wget -cnv https://getcomposer.org/composer.phar -O composer.phar
php composer.phar update --no-dev


 









Create WordPress widget template from scratch
 




I’ve save down the most basic widget code for WordPress, you can copy this to your plugin and modify it to start your first widget. You can save time on this tutorial to help you create wordpress widget from scratch.


<?php

class example_widget extends WP_Widget {
    function __construct() {
        parent::__construct(false, $name = 'Example Widget');	
    }
 
 	/** @see WP_Widget::widget -- do not rename this */
    function widget($args, $instance) {	
        extract( $args );
        $title 		= apply_filters('widget_title', $instance['title']);
        $message 	= $instance['message'];
        ?>
		<?php echo $before_widget; ?>
			<?php if ( $title )
			echo $before_title . $title . $after_title; ?>
			<ul>
				<li><?php echo $message; ?></li>
			</ul>
			<?php echo $after_widget; ?>
        <?php
    }
 
    /** @see WP_Widget::update -- do not rename this */
    function update($new_instance, $old_instance) {		
		$instance = $old_instance;
		$instance['title'] = strip_tags($new_instance['title']);
		$instance['message'] = strip_tags($new_instance['message']);
        return $instance;
    }
 
    /** @see WP_Widget::form -- do not rename this */
    function form($instance) {	
        $title 		= esc_attr($instance['title']);
        $message	= esc_attr($instance['message']);
        ?>
         <p>
          <label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label> 
          <input class="" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" />
        </p>
		<p>
          <label for="<?php echo $this->get_field_id('message'); ?>"><?php _e('Simple Message'); ?></label> 
          <input class="" id="<?php echo $this->get_field_id('message'); ?>" name="<?php echo $this->get_field_name('message'); ?>" type="text" value="<?php echo $message; ?>" />
        </p>
        <?php 
    }
 
 
} // end class example_widget
add_action('widgets_init', create_function('', 'return register_widget("example_widget");'));
?>


 









Install Tinyproxy on Centos 7
 




Tinyproxy is a light-weight HTTP/HTTPS proxy daemon for POSIX operating systems.

Designed from the ground up to be fast and yet small, it is an ideal solution for use cases such as embedded deployments where a full featured HTTP proxy is required, but the system resources for a larger proxy are unavailable.


yum install -y epel-release
yum update -y
yum -y install tinyproxy
yum install vim -y



vim /etc/tinyproxy/tinyproxy.conf


Search for


Port 8888



Then

Search for:


Allow xxx.xxx.xxx.xxx



If you want to let it connect from anywhere then just comment it, but I’m not recommended, because it will allow other user connect in.


To test from the Allowed server to the TinyProxy Server


ssh [email protected] -L 1234:localhost:8888 -N


curl -I https://juzhax.com/ --proxy [email protected]:8888