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Mon, Aug 23, 2010 9:26 pm

Determining the Version of CentOS or Redhat Linux

To determine what version of CentOS or Red Hat Linux is running on a system look at the contents of cat /etc/redhat-release.


  1. How To Determine CentOS or Red Hat Version
    Posted by Jeff
    Date: March 10, 2009
    rackAID - Linux Server Management Services for Small Business

[/os/unix/linux/centos] permanent link

Tue, Aug 10, 2010 7:31 pm

Turbo Lister Postage Warning

When she tried to upload an item she intended to sell on eBay with Tubo Lister version, my wife received the error message below:

Warning - The postage cost will be calculated based on dimensional weight, not the actual weight of your package. Please check the weight and dimensions of your package.

She had specified the dimensions and weight of the item and both domestic and international shipping options, so it wasn't apparent to either of us why she received the message. Apparently, the warning can be ignored, though. I found someone else, exdwh posting the following at Re: error code: 21916962 on July 9, 2010.

That's only an informational warning.

The only way to 'get rid of this error' would be to substitute the dimensional weight as calculated by the shipping carrier.

A better solution is to filter out the warnings you don't care about.

When she ignored the message and uploaded the item for sale with Turbo Lister, the item looked fine on eBay.

[/os/windows/software/auction] permanent link

Sun, Aug 08, 2010 8:12 pm

Determining Who Voted for Which Option in an SMF Poll

If you are using polls in a Simple Machines Forum (SMF) forum, it is possible to determine who voted for which option in a poll by using phpMyAdmin or by entering MySQL commands.

[More Info ]

[/network/web/forums/smf] permanent link

Sun, Aug 08, 2010 5:36 pm

Installing phpMyAdmin on a CentOS System Running Apache

To install phpMyAdmin on a CentOS system running an Apache webserver, login as root and issue the command yum install phpmyadmin from a command prompt.

Note: you may have to install the Remi Repository or the RPMForge Repository to be able to locate and install phpMyAdmin. Instructions for configuring yum to use one of those repositories can be found via the links below.

Remi Repository
RPMForge Repository

After installing the software you will need to restart Apache, which you can do with apachectl restart or service httpd restart . You can then try accessing phpMyAdmin by substituting your domain name or IP address for

If you receive a "403 Forbidden" error with the message "You don't have permission to access /phpmyadmin on this server.", it is likely because you are attempting to access the software from outside of the server itself. The orginal phpmyadmin.conf file contains the lines below:

#  Web application to manage MySQL

<Directory "/usr/share/phpmyadmin">
  Order Deny,Allow
  Deny from all
  Allow from

Alias /phpmyadmin /usr/share/phpmyadmin
Alias /phpMyAdmin /usr/share/phpmyadmin
Alias /mysqladmin /usr/share/phpmyadmin

The Deny from all line states that the default behavior is to prevent any IP address from accessing phpMyAdmin. The next line, Allow from provides for the exception of accessing the software from the server itself, i.e., the "localhost" address You could change the "deny from all" to "allow from all" to allow access from anywhere or put a "#" at the beginning of the line to comment it out. Or, you could add additional IP addresses or FQDN's after the to allow access to phpMyAdmin from other systems. E.g. you could change the line to Allow from 192.168 to also allow access from any IP address beginning with 192.168. Restart Apache again.

If you then try accessing phpMyAdmin, e.g., you might use, if was your webserver's IP address, but get the error message The configuration file now needs a secret passphrase (blowfish_secret). then you need to edit /usr/share/phpmyadmin/ Look for the following lines:

 * This is needed for cookie based authentication to encrypt password in
 * cookie
$cfg['blowfish_secret'] = ''; /* YOU MUST FILL IN THIS FOR COOKIE AUTH! */

Place a password between the two single quotes, e.g., you could have a password of SomeGoodPassword with the following:

$cfg['blowfish_secret'] = 'SomeGoodPassword';

If you refresh the webpage, you should then see a phpMyAdmin login window where you are prompted to enter a username and password, which should be the mysql root account and it's password.

For further information on phpMyAdmin and MySQL, there is a book by Marc Delisle, Mastering phpMyAdmin for Effective MySQL Management.


  1. phpMyAdmin
  2. RPMForge Packages and Yum Priorites
    Date: May 3, 2008
    MoonPoint Support
  3. Remi Repository
    Antoine Solutions Development A Free PHP IDE built on Open Source Software
  4. Quick 'n' Easy LAMP Server For CentOS/RHEL
    By: olddocks
    Date: May 28, 2008
    HowtoForge - Linux Howtos and Tutorials

[/network/web/tools/phpmyadmin] permanent link

Sun, Aug 08, 2010 1:45 pm

Restricting Access to an Apache Virtual Host

To restrict access to an Apache Virtual Host by IP address, you will need to have the mod_authz_host module loaded in the Apache configuration file httpd.conf, which can usually be found at /etc/httpd/conf/httpd.conf on a Linux system. To determine if it is loaded, look for a line similar to the following in the configuration file:

LoadModule authz_host_module modules/

You can restrict access to a website that is set up as a virtual host by including information on what IP addresses should have access to documents on the website in a directory section Directory as shown below.

<VirtualHost *:80>
    DocumentRoot /home/www/example
    ErrorLog /home/www/example/logs/error.log
    CustomLog /home/www/example/logs/transfer.log common
    <Directory /home/www/example>
      Order Deny,Allow
      Deny from all
      Allow from 192.168

In the case above, access to the document root of the website, i.e., all documents on the website, is restricted to allow access only from IP addresses beginning with 192.168 and, which is the "localhost" address, meaning the address of the server itself. Anyone trying to access from any other IP address would see the default webpage for the server, if any, not the website.


  1. Access Control
    The Apache HTTP Server Project
  2. Apache Module mod_authz_host
    The Apache HTTP Server Project
  3. Learn how to configure Apache
    Date: September 29, 2003
    TechRepublic Articles

[/network/web/server/apache] permanent link

Sat, Aug 07, 2010 10:23 pm

Configuring Outlook 2003 to Check a Gmail Account

Microsoft Office Outlook can be configured to download email from a Gmail account by following these steps.

[/os/windows/office/outlook] permanent link

Sat, Aug 07, 2010 10:21 pm

Exporting a Gmail Contact List For Use in Microsoft Outlook

To export a Gmail contact list for use in Microsoft Outlook, take the following steps:
  1. Log into your Gmail account.
  2. On the left side of the webpage for your Gmail account, you should see Contacts; click on Contacts.
  3. Under Export, you will see "Who do you want to export", select the contact list you wish to export by using the dropdown list provided.
  4. For "Which export format", select "Outlook CSV format (for importing into Outlook or another application)"
  5. Click on the Export button.
  6. Save the .csv file wherever you wish to place it on your system.

Now that you've saved the Comma Separated Value (CSV) file on your system, you can import it into Microsoft Outlook. To do so in Outlook 2003, take the following steps:

  1. Select Contacts.
  2. If you wish to create a new separate Outlook contact list for the Gmail contact list, click on File, select New, then Folder. In the Name field, type a name for the Folder. Leave "Folder contains" set to "Contact Items", then click on OK.
  3. Click on File.
  4. Select Import and Export
  5. For the action to perform, select "Import from another program or file.

    Import from another program or file

  6. Click on Next.
  7. For "Select file type to import from", select "Comma Separated Values (Windows)".

    Import Commma Separated Values

  8. Click on Next.
  9. For "file to import", you have 3 options:

    Replace duplicates with items imported
    Allow duplicates to be created
    Do not import duplicate items

    The selection you make among those 3 options is a matter of personal preference. If you aren't importing into an existing contact list in Outlook, but will, instead, be using the new one you just created, then it doesn't matter much which option you select. If you're importing into an existing list, e.g., you are updating an Outlook contact list again from one you've previously imported into Outlook, you probably don't want to have duplicate entries, so wouldn't want to select the second option to allow duplicates to be created. If the Gmail list is the more up-to-date one, you probably want to select "Replace duplicates with items imported."

    Select file to import

  10. Click on the Browse button and browse to the location of the .csv file you created from the Gmail contact list. When you've selected the file, click on Next.
  11. For "Select destination folder", choose the main contact list or the one you created previously, then click on Next.
  12. Click on the Finish button.

[/os/windows/office/outlook] permanent link

Wed, Aug 04, 2010 10:12 pm

CD and DVD Preferences under Mac OS X

If you put a blank disc in the disc drive in a Mac OS X system, but you don't see an icon appear on the desktop representing that disc, you may need to change the System Preferences settings for CDs and DVDs. If the configuration is set to "ignore", then you won't see an icon representing the blank disc appear on the desktop. To change the settings, take the following steps:
  1. Click on the Apple icon at the top left of your screen and select System Preferences.
  2. Select CDs & DVDs.
  3. Check the settings for "When you insert a blank CD" and "When you insert a blank DVD." If they are set to "ignore", then that explains why no icon appears on the desktop when you insert a blank disc.

    Blank CD & DVD preferences

  4. You can choose from the following options:
    • Ask what to do
    • Open Finder
    • Open iTunes
    • Open Disk Utility
    • Open other application...
    • Run script...
    • Ignore
  5. You can choose Open Finder to have an icon appear on the desktop for the disc, e.g., "Untitled CD" for a blank CD. When you've changed the setting, you can close the CDs & DVDs window.
  6. References:

    1. Mac OS X 10.2, 10.3: You put in a blank disc, but it doesn't appear
      Last Modified: January 8, 2007
      Article: TA22349
      Apple - Support

    [/os/os-x] permanent link

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