Debian - Time

Time Zone

Time zone is stored in /etc/timezone file. Running /usr/bin/tzselect will help you find your time zone but doesn't update your system.

Setting Time Zone on system wide

run tzconfig


Once you've set your timezone you might wish to change the UTC setting, upon Debian machines you can find that in the /etc/default/rcS file. Although changing this will require a reboot. I think, hwclock --systohc --utc command (in case UTC=yes) could be used instead of reboot.


Debian - BASH Prompt Customization

Customization of the the Bash terminal line

Add the following codes in ~/.bashrc. Every time you open a Bash terminal, the first line will show HH:MM:SS@hostname:workingDirectory # .

Debian - Network Configuration

Manually configure network in Debian

If you are manually setting a static IP address in Debian, you have to edit /etc/network/interfaces. For example, if you want to change your eth0 interface to use a static IP address instead of dynamic IP address , change the following settings accordingly.

#iface eth0 inet dhcp #Comment this line out with the pound(#) key. It was your dhcp setting(dynamic IP address).
# Add the following lines below in /etc/network/interfaces.

Debian - mplayer


CakePHP - User Model::saveAll() to save hasMany association

In view

  echo $form->create('Phone', array('action'=>'save'));
  for($i=0; $i<3; $i++)
    echo $form->input('Phone.'.$i.'.number');                                                                                      
  echo $form->submit('Save');
  echo $form->end();

Here is how the Controller see the phone data after users filled the fileds and clicked on the Save button :

[PhoneNumber] => Array
    [0] => Array
          [id] => 1
          [phone_number] => (123)456-7569
    [1] => Array

CakePHP - Pagination

I can't change the output of PaginatorHelper::next and PaginatorHelper::prev to return as <span>. So, I wrote code to replace <div> with <span>.

  if($paginator->hasPage(null, 2))// Don't display pagination if there is no second page.
    $sPrev = $paginator->prev('«'.__('Previous', true), null, null, array('class'=>'disabled'));
    $sPrev = str_replace('<div class="disabled">', '<span class="disabled">',$sPrev);
    $sPrev = str_replace('</div>', '</span>',$sPrev);

CakePHP - See all data that have been sent to the controller

Put the following in the function of your controller:

CakePHP - Fields Data Validations

Change validations errors messages

CakePHP - Execution order of multiple validation rules

Below is a typical validations rules for User Model. The validations rules of a field are ran from bottom up. In this case, for the email field, it will run stringLength, email and then isUnique rules.

class User extends AppModel
  var $name = "User";
  // Validation rules.
  var $validate = array(
            'message'=>'This username has already been taken.',


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