Category Archives: Linux & Technical

Dlink DGS-1005D and DGS-1008D Powered Off On it’s Own

So this week I ran into a situation where I had a bunch of the D-Link DGS-1005D 1GB switches all mysteriously turned off on me at the exact same time.  So I looked into it a little bit further and discovered that if the electricity supply surges downwards at all, the DGS-1005D (and DGS-1008D too apparently) basically turns off.  You may still see the power light on but likely the link lights will all be off.  Simply pull the power, put it back in and you should be good to go.

This happened to me earlier this week.  I do also have a DGS-1008D but it remained on, however apparently this unit is also susceptible to the same power fluctuation problem.

At this time I am unaware of any firmware upgrade to the fix the problem but I have a sneaking suspicion that the problem is in the power supply itself and not the switch component.

GSM7324 Password Not Working After Changing/Updating Password?

Really short and simple post here.

If you’ve changed the admin password on your GSM7324 and are finding afterwards that it’s not accepting your password and you know you’re typing it correctly, I’d like to point out that the GSM7324 device accepts a maximum of 8 characters in length.  The manufacturer is nice enough to tell us in the documentation but not nice enough to tell us as we’re typing in our new password.

So try truncating your password as you type it in to just 8 characters.

EXAMPLE:
password: mypassword (which is 10 characters) would then become….
password: mypasswo (which is 8 characters)

This should get you in.  If not, sorry, I’m not sure what’s happened in your situation.  Perhaps the use of special characters are not allowed in which case try the password whilst ommiting those characters.  Just a guess.

HowTo: Using Yum to Install PhpMyAdmin 2.x on CentOS

Over the years I’ve needed to install PhpMyAdmin on a number of servers.  This article will cover how to install PhpMyAdmin on CentOS using Yum.

Installing PhpMyAdmin 2.x (I’ll post one for PhpMyAdmin 3.x soon)

For starters, you’ll need to make sure that you have at least PHP 4 or newer installed.  Here’s how you can check that.

  • Create a new empty php file.   test.php for example
  • In the file, write: <?php phpinfo(); ?>
  • Save the file and upload it to your server
  • Goto yourdomain.com/test.php and you will see a page popup with the specifics of your version of php

If you’d rather do this through shell, you can do the following:

cd /var/www/html/

ls

cat > index.php

<? phpinfo(); ?>

See below on how to install PHP if it’s not already installed.

If your PHP is older than 4, your REALLY need to have that upgraded.   Assuming that you do have php4+, make sure that you also have at least MySQL 3 or newer.  These days, most hosting providers use MySQL 5 though some still use 4.   I’d say there’s very little chance you’re on anything lower than version 4 so it’s probably not necessary to check.

If you don’t have MySQL installed on your server, you can do the following.

Note: I’m going to assume that you have ssh or shell access to your CentOS server with enough permissions to proceed.  A lot of the following is from the command line.  All of the italicized text should be typed into shell.

Starting the PhpMyAdmin Install on CentOS

Now that you know you have the back-end requirements, it’s time to get started.

  1. Start off by updating your packages.  It’s generally a good idea to have them up to date anyways

yum update

Installing MySQL

yum install mysql-server mysql mysql-devel

/etc/init.d/mysqld start

This should take care of installing mysql on CentOS for you.  When you first install mysql on CentOS (or any Linux distribution for that matter), there is no password.  It is very important that you set this, otherwise you’re leaving open a rather large security hole.  You can set up the password from shell by doing the following

mysql

mysql> USE mysql;

mysql> UPDATE user SET Password=PASSWORD(‘your-password-here’) WHERE user=’root’;

mysql> FLUSH PRIVILEGES;

mysql> exit

Your mysql root password should now be set.  You’ll probably also want to add MySQL to the autostart so it starts up automatically after any time you restart your server.

setup

Select Service -> mysql

Next up we’ll install PHP.

Installing PHP on CentOS

We’ll want to install both php itself and some other common related packages.  From shell, perform the following commands

yum install php php-gd php-imap php-mysql php-pear php-xml phpxmlrpc curl libxml2 php-mbstring php-mcrypt

Note: The above is one long command.  My blog page may have wrapped it so just be sure to type that as one line.

The CentOS server is now all set up and ready to begin the PhpMyAdmin installation

Installing PhpMyAdmin on CentOS

Now that we know our CentOS server is ready to install phpMyAdmin we can download the phpmyadmin packages and get ready to go!

You will need to download phpmyadmin.  As of this posting, the most recent version of 2 is 2.11.10, which can be downloaded from http://downloads.sourceforge.net/project/phpmyadmin/phpMyAdmin/2.11.10/phpMyAdmin-2.11.10-all-languages.tar.bz2

cd /usr/share

wget http://downloads.sourceforge.net/project/phpmyadmin/phpMyAdmin/2.11.10/phpMyAdmin-2.11.10-all-languages.tar.bz2

tar xvfz phpMyAdmin-2.11.10-all-languages.tar.bz2

mv phpMyAdmin-2.11.10-all-languages.tar.bz2 phpmyadmin

rm phpMyAdmin-2.11.10-all-languages.tar.bz2

cd phpmyadmin/

cp config.sample.inc.php config.inc.php

From here you will be editing the configuration file for phpmyadmin.  I usually use the nano text editor, but you can use any text editor you wish – such as vi

nano config.inc.php

You will need to edit the blowfish secret line(s) to something unique.  This is for your security so do it!

nano /etc/httpd/conf.d/phpmyadmin.conf

Set an alias for /phpMyAdmin /usr/share/phpmyadmin

Exit your text editor and then…

service httpd restart

PhpMyAdmin is now installed on your CentOS server.  Of course you will still need to move a copy onto your website space and change the permissions.  Example

cp -R /usr/share/phpmyadmin /home/website/public_html/

cd /home/website/public_html/

chown -R user:group phpmyadmin

Make sure the ‘user’ and ‘group’ are what they need to be! Under no circumstances should you leave the permissions as root!!!

You should now be able to get to phpmyadmin in your browser to begin configuring it at http://your-website-address/phpmyadmin

Question, comments or corrections?  Please post them!