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Show all RPM packages installed and what repository they came from on RedHat or Centos
Eric.London's picture
Submitted by Eric.London on 10/28/2011
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Here's a quick linux command to show all the packages you have installed (on RPM based systems, like RHEL and Centos) and what repository they came from. NOTE: the "sort" command sorts the packages by name, and the "column" command outputs the list in a neatly formatted tab delimited display in your terminal.

$ rpm -qa --qf '%{NAME} %{VENDOR}\n' | sort | column -t

Sample output:

$ rpm -qa --qf '%{NAME} %{VENDOR}\n' | sort | column -t | head
acl                                  CentOS
acpid                                CentOS
alsa-lib                             CentOS
amtu                                 CentOS
anacron                              CentOS
ant                                  JPackage  Project
antlr                                JPackage  Project
apr                                  CentOS
apr                                  CentOS
apr-util                             CentOS

And if you wanted to see all packages that came from external (non-Centos) repositories:

$ rpm -qa --qf '%{NAME} %{VENDOR}\n' | sort | column -t | grep -iv Centos

Removing a column from a view for unauthenticated users using hook_views_pre_build()
Eric.London's picture
Submitted by Eric.London on 10/12/2009
Tags:

In this tutorial I'll show how you can programmatically and dynamically remove a column from your view. In my example, I chose to hide an email column from unauthenticated users, but you could apply this code to do pretty much anything.

To get things started, I defined a content type of "Profile" to contain some user details (using the Content Profile module) and used the Devel module's generate users and nodes functionality to create some sample data. I then created a view to show the data:

Here is my page view display:

Now you can add the hook_views_pre_build() function in your module. Since the $view object is large, I recommend using krumo() (which comes with the Devel module) to browse through the $view object's properties.

<?php
function MYMODULE_views_pre_build(&$view) {

  // check for your view name (in my example: people)
  if ($view->name=='people') {
    krumo($view);
  }

}
?>

The above code will neatly format the $view object in a hierarchical display. You can click to expand each class property.

As you can see, the $view object has a lot of data in it. At this point, you'll need to get acquainted with the structure of the handler object of the view ($view->display['default']->handler) and determine what to modify. To remove the email column for unauthenticated users, you can add the following code:

<?php
function MYMODULE_views_pre_build(&$view) {

  // check for your view name (in my example: people)
  if ($view->name=='people') {
  
    // check if the user is anon
    if (in_array('anonymous user',$GLOBALS['user']->roles)) {

      // remove view hander properties for email column
      unset(
        $view->display['default']->handler->options['fields']['mail'],
        $view->display['default']->handler->options['style_options']['columns']['mail'],
        $view->display['default']->handler->options['style_options']['info']['mail']
      );

    }

  }

}
?>

When I logout, my view no longer shows the email column:

Using jQuery to ensure Panel columns are the same height
Eric.London's picture
Submitted by Eric.London on 7/7/2009
Tags:

I recently implemented the Panels module to create a page layout with 3 columns. I added background images to the columns, repeating on the y axis to span the entire length of the column. The problem I encountered: you cannot predict how tall the content will be in your columns and they will be staggered. To provide a more uniform styling, I added some jQuery to find the tallest column and set the shorter ones to the max height.

$(document).ready(function(){

  // keep track of the tallest column
  var tallest = 0;

  // loop through columns and find the tallest
  $('#panel_other_programs .panel-panel').each(function(){
    if ( $(this).outerHeight(true) > tallest )
      tallest = $(this).outerHeight(true);
  });

  // loop through columns and adjust height as necessary
  $('#MY-PANEL-UNIQUE-IDENTIFIER .panel-panel').each(function(){
   
    // check if current column needs to be adjusted
    if ( $(this).outerHeight(true) < tallest ) {
      // set new height
      $(this).height( tallest );
    }
  });

});

Now, all the columns should have a uniform height and the backgrounds should all span the entire length of each column.

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