Monthly Archives: June 2013

Kill and Logout users in pts/* Linux

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As a  Linux administrator you may need to force logout and kill a specific user, or an active user in pts/0 pts/1 pts/3 etc. Also this tutorial will work in most linux distros.
First of all display the out put of “w” command.

[root@server ~#]w
18:08:30 up 3:54, 3 users, load average: 0.05, 0.02, 0.00
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 192.168.10.100 14:15 0.00s 0.05s 0.01s w
james pts/1 192.168.10.100 18:07 50.00s 0.02s 0.02s -bash
james pts/2 10.10.20.23 18:07 39.00s 0.02s 0.02s -bash

Here the user “james” is logged in from two different machines. And you need to force logout and kill the user “james” logged in from ip: 192.168.10.100 (pts/1)

use the below command

[root@server ~#]skill -KILL -v pts/1

This command will force logout and kill the user in pts/1. and the same user logged in pts/2 will not be logged out.

If need to kill a users all the connected sessions at once

[root@server ~#]skill -KILL -u james

(this will kill both pts/1 and pts/2 cessions)

To STOP/PAUSE a user’s activities

[root@server ~#]skill -STOP -u james

To RESUME a stopped user

[root@server ~#]skill -CONT -u james

Edit

There is some bug in recent Debian(7) and distros based on them like Ubuntu, which will make the command 

skill -KILL -v pts/1

do nothing

What you can do in such case is to get the PID of the terminal you want to kill with

 skill -i -t pts/1

it will return something like 

pts/1    root     27933 bash               ?

Just kill it – 

kill 27933

Blank Widget

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This example widget code, place the code in separate file, then include it in finctions.php like that:

require( get_template_directory() . '/menu-widget.php' );

Register the widget(match the class names!)-

    function register_my_widget() {  
        register_widget( 'example_widget' );  
    }

And call the widget:

add_action( 'widgets_init', function(){
     register_widget( 'My_Widget' );
});

And here it comes the widget code:

<?php
/**
 * Example Widget Class
 */
class example_widget extends WP_Widget {
 
 
    /** constructor -- name this the same as the class above */
    function example_widget() {
        parent::WP_Widget(false, $name = 'Example Text 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="widefat" 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="widefat" 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");'));
?>

You can use ultimate posts widget to display posts – ultimate-posts-widget.1.8.1