Linux System Admins Blog » Installation

Google 500 Error

andrew — Wed, 02 Jun 2010 15:01:14 +0000

Funny, here is what you get to those who have not received this yet. I got this while on YouTube unlink accounts:

500 Internal Server Error

Sorry, something went wrong.

A team of highly trained monkeys has been dispatched to deal with this situation.

If you see them, show them this information: 9tE7ZMgxBSriv_77QysO1ltAPvPBKMi_nAq0HsNCM4reIvdRU5qCmvvn-uG9 x4XTgNjGQxteXotgBV7IeeugS_eQq17zaz5OoKdyub6gP7ilQgI3bUWbZQQ7 VX6fbW3FBjOrkkOmvC1ROJHEZkysx_o6a4Y8n_vXzFL3ymU_i87bXN8RBzuk l2JNYFAGdoNaLq_Q-bPXixNlQPoLwIAKECq7ZHGQPCDMe8tdkZCu6QE3Lz1v dF5jgpnm-qmwZTPj695svH5zsCh9QkmD9SMsUVj10fETMVqgHwV6HL1XXtfS w0uSnunW5hdVOMZ85VlQmH8w0lemC2k9C37y3yX69IyK_2NSeu1FE3F6nB90 XLHxG9BkSASeeo9z2BNKuDWoED_p9SJubi-xJ4vl1cPO5yXcwhoDWJ8icF-W 89IBGxsXYOoBshN-kULVBl0qCLx-OAL9b7cwIOpAi10NahEZzhjqsCLAYbh_ 55mSawO0JyeQOMGvDH1smY-rm7uyCwoW5gjGf04C_s0pi-gHLduRf1DSlHMj o11Lxme77acBzZG-gbW_Yvm9TClYQjHbbMEore2qmcRsGc7-PpcjG8I4fmjc UwXd1jc87ELIafKFhbEfKKSOAEAzu5OjTPLgsexW0oL9LuxEcxAYu6rugY6Q rlawjjaOloYkQmiKCmIKjKVa8TB3GLn1Q6U00GCpJ0U53s8YnFWFAK9y8XJy uuPQzDzxpMWKa11FYzxgiSKr_JyDRSDh1Dg65hXyRGcf-Hs0mcdckvOFOWwD K0dFbrcgxPqXVgsVpEjhxjVJnAftt3AKePsaPcKzW8k3BxlBGsyqWisk_gQ9 DuysZLb9jAI5zZVIGvDbN0uGM9pc6ARffEn3MkVHqdAnnzZ7WusTZ0bMT-vf dTGlcycgcjx1StBKEcNhTYc1F_1FCf_ONmrMQHWv91y3HIV4b1vf3mZSIsVO wm2uf0WjBFWr2uLWLuD2f504OptdEe4qxHhtVPGnbZeVRTJ39JX4nMNScDg1 K2hkc9-YOiAhjgImpMhh2WdZvlOMA3t_NsiUDNHbOW5NogoxxMUZDmG0mTtz oFvH8lVWv9BuHqsMHurzuo-yDFTj_90Z1ephEDor3sFPqX41u3mfRXxUJxCx kS6cwQ5HwS1xnojbAGMu5O5ES0tHzIdUcyZs73GW-6V21fHI2vSkyyrcrVf6 WYOBeI4EBMmYZhuh9vRwzorKmj3Bim2vf-GRhseqY2Blkbt6Wo2A0Un0Q7Pc Rev33zueEQz8IIVG6xVG8SMkyZSV1737Afc3amMSLtzTN1-i3rrGhLXk6rF6 p7PWdC_6UqNvFjenQ69EkE9iFYboyRMisoy2eE0_gfbSAlFnjqp4oaLwYO5y St1SKE_v8DHXcCmVQDEzubtmrJ9M6ARwTxvQFT_hJ7rXNsapPg9j_dnzHcT0 -5xpiJV9tfUDgq1iBndScPLluK0IYfwtfOtH5BLCiD_foBFBNq9b2vPO4_Fs GZKEVq4DCupWYCby3VIZAP1GYeixzpHtmBp1P7g5vTTfaq0ENfslcCiI4QQg 4AamEM14L6YMQbUr_C7hC375hzbyrQJ1ZXi7nCazu_USD5CnxdVaEb3NKKTl K-3CfrsO6QpwerA-LmYim0ys1fdG3xrSRy1ewyYXgBGcS4o5nyTceLae2_4c ool3SlAKOJl68q09ziQSubSjGpLaOj8Pxuo8QAwhl9dvLzJKQ6HneQiG7OdU mRZ_ONm9_7pH3iJdulfWR5sa-2uytUmzce4fNTKDU_JWHhUIZbsndxU5_NO3 jFtTJK_eysUBnx2WY7nSQlbfD6FkVpznQ0ZesbaZHK2gs903Bak_8y9jic01 gX1dhfkRuFgoB6mq6w4vPDGUNFj99AAWl1HiSQBtv75tONpwn8EF_qvy2417 sC_nzYgPuZzDz_phKWS-HO3Zw-DNrt9Eo8-RJ3b1bzFfU0PVp3vEAPpFHsWS G3k2m6KhrD0BDbPMWyYwTsW0F_Np1qFG6ulr48HqkgexnXKg_MrG2rLHd_FL -hwtu-0p-nMOSSPx1kdzve-rqiXVBbUqaj5QR2tSq24Flf0HkpDJ-tfGeVKc rtJ-U1eYWZJho9L0MIaqBlOXgCtqB8lVrHlq8_LuCKMZGKsbn5HowL58Ug-a zF-EAd7eMuZxjdoZqqiMOXJMK8A56MJFq5GQuvhw_P9tstCczq9688Qh6vUN OYBiZ39m7L_5FoeN_u3A1NX2FUrb5ocXh8DWC21qTHaL3i0yEKWxZN3RMEY7 BMwO4I9pqYmNVTNHceRw9kjoXyp6qh-Yrf_8yRrb-bf3buk7uldHQjOa4qDw yMFLTjejxiVpOJWYlymy5bGCGdCJDgf4_F6fYshPVUi6Rai7lF3DDuwJNquu OwhO6q3b0pubxrw7w64Z9eazfybD2ZrvyVZJnowRHV7O2Ixb0fK016BW2cXq _7V_fnM55BH5sr97xdJDSRX27WmduvDVqPnRqj2nicvWgaGnIvbsGAKJJXn2 7rICyih2gzF-U-d9YCBktgoCpTk9up_aXqT_oOqkTHwKnt4ksaDPkcwh3laj 9E-9rDEgBZ6Fbn8UpHJrxkxEyta1T1Mf115nJd3YjstAAtpdsZ2afGbyFzvS dUMkySkLUSDVHJuKnQCaqOZRSQ96zVBc0m8SD5QNKUh0gj0voIMriUAuz_yh Xl7KadRx4g8PiL8z94CSeBhsa8P_zwHZvAhWpnXqT1YDndz1HCmYy94gFD0F xG2SmJD7GwGp_8wBAsYMCvQOH-n8keovGuFulosU2UivnVKnmL51mI7XMrpY F7n6pOactiFAilO27zqXI9iIKYA8ELwbdRyhD3yWXedqSOArEIcSc7HakyNc

Joomla site error: “mark( ‘afterLoad’ ) : null; /** * CREATE THE APPLICATION…”

gerold — Wed, 19 May 2010 16:39:40 +0000

I happened to setup a Joomla site from other hosting (zipped Joomla files and mysqldump), and after the setup on our server I got the error (below) – not exactly an error but a contents of “index.php” file. I found few Joomla related discussion regarding this issue but there’s no solution.
mark( 'afterLoad' ) : null; /** * CREATE THE APPLICATION * * NOTE : */ $mainframe =& JFactory::getApplication('site'); /** * INITIALISE THE APPLICATION * * NOTE : */ // set the
......
JDEBUG ? $_PROFILER->mark('afterRender') : null; $mainframe->triggerEvent('onAfterRender'); /** * RETURN THE RESPONSE */ echo JResponse::toString($mainframe->getCfg('gzip'));

I found the problem on “.htaccess” file as it contain a line “AddType x-mapp-php5 .php”. I commented out the line because I think it is related to parsing PHP files and this solved my problem. I searched for this code and it is related to servers with PHP 4 and 5 installed – details below from 1and1 hosting.

By default Apache uses PHP 4 for .php extension. If you don’t want to rename all your
scripts to .php5 you can do the following:
Create a .htaccess file and place the following line AddType x-mapp-php5 .php in it.

This will tell Apache to use PHP 5 instead of PHP 4 for the extension .php in the
directory the .htaccess is placed and all sub-directories under it.

You can use AddHandler x-mapp-php5 .php as an alternative for or instead of
AddType x-mapp-php5 .php

SSL Certificate registration now includes “www” subdomain.

gerold — Wed, 19 May 2010 10:37:46 +0000

Good News!

I recently purchased SSL certificate (GeoTrust QuickSSL Premium) for our client domain (example.com) and I was surprised because it also registered the “www” sub-domain (www.example.com). Before, you need to purchase both SSL or configure your website to redirect to either www or non-www.

I am not sure if this is available on other SSL type from GeoTrust and other SSL providers.

Black Friday – 404, Site not available, and others from your favorite sites

andrew — Thu, 26 Nov 2009 01:03:23 +0000

My small collection of my favorite 404 and error messages on the web, from mostly big sites. Some are humorous, some are quirky, and I think they are all great. No one is perfect.

Enjoy.

Top web site error pages – my favorites.

1) barrackobama.com – simple, to the point, diffusing.

Obama.org site not availalble 404

2) Plaxo.com – (oops! There seems to be a problem. I’ll tell you what… let us fix it and this can be our little secret.) humorous

3) crowdspring.com – (our servers are currently fighting among themselves and we’re putting them into a timeout.) – if you have kids you will appreciate this.

crowdspring.error error

4) youtube.com – (“The functionality is not available… Be cool – we’ll be back 100% in a bit.”) – I like the slang

be cool - you tube 404 image

5) Witter error – before the whale

twitter error, before the whale

6) Google apps error – not funny, not cool… common google, you can be fun too!

google error

7) suumbleupon.com error – (“we’ll be right back, in the mean time why dont you go outside and play for a while”) – LOVE this one

Facebook error – not funny at all, especially since it happens a lot

9) the now famous twitter whale – simply brilliant

twitter whale

10) technorati.com error (“Doh! The Technorati Monster escaped again.”) – good one

techocrati 404

XEN VM mount external devices

max — Mon, 23 Nov 2009 22:56:46 +0000

Adding additional block devices to XEN guests is accomplished using xm block-attach command. In this example I am exporting an external USB hard drive that was recognized as /dev/sda1 by the hosts kernel. Important thing to keep in mind is that you must use xvdX as the guest block device name.
xm block-attach 6 phy:/dev/sda1 /dev/xvda1 w

This command will export /dev/sda1 on host machine to guest domain 6 as /dev/xvda1 with write permissions.

MySQL sale to Oracle blocked by EU

andrew — Tue, 10 Nov 2009 18:02:32 +0000

Today the EU createded a serious road block on the road to the merger of Sun Microsystems and Oracle. Here is the timeline of events up to now.

European antitrust authorities formally objected to Oracle Corp.’s proposed purchase of Sun Microsystems Inc., complicating a $7.4 billion deal that U.S. officials had already blessed.

The companies said Monday that the European Commission, the European Union’s executive arm, issued a statement of objections regarding the deal, which they said focuses on whether Oracle’s takeover of Sun’s MySQL database software would reduce competition in the database market.

Here is a quick recap of MySQL history, and how it got where it is today:

MySQL is born in 1994.
MySQL becomes the most used and popular database used by websites.
Sun Microsystems buys MySQL for 1.0 Billion Dollars.
Sun hemerages money, Oracle steps in to buy Sun/MySQL.

sun mysql logo

So where does this leave MySQL and hundreds of sites that depend on it? Sun has predominantly been a hardware company. Oracle recently introduced its software running on Sun hardware (You may have seen the ads comparing Oracle Running on Sun being x number of faster than same software running on IBM hardware). Oracle maintains that MySQL will continue to stand alone as a open-source product. However that may just be the problem that the EU has with it, saying that because it will be owned by Oracle, which already has a powerful commercial product, the merger will prevent MySQL from becoming another powerful database commercial competitor. So, what do you think? Will MySQL wilt in the shadow of the mighty Oracle?

Can’t Set Root Password In Ubuntu

gerold — Mon, 09 Nov 2009 07:34:13 +0000

I installed Ubuntu 9.10 (Karmic Koala) to my new laptop (HP EliteBook 6930p), and first on my to-do list is to set the root password so I can do additional package installations and configurations. But this time, after I unlocked and set password for my root account, i still can’t login (via terminal) as root. I even tried to set password three times just to make sure i typed it correctly. As usual, if something is not working out of the box the next thing to do is to search for ‘known issues’ for laptop brand/model. Then I found similar report on Ubuntu Forums from they gave a link to “Policy on log-in-as-root tutorials” with explanation on Ubuntu’s RootSudo policy. I did get a chance to look further on this as to which version it was implemented.

So if you really need to login as root you can either use the “sudo -i” to simulate the root login (this will ask for your password and log you in as root), or enable the root account “sudo passwd root” (this will ask for your password and will prompt you to enter new root password).

Amazon EC2 prices fall + High Memory Instances + RDS

max — Tue, 27 Oct 2009 14:50:58 +0000

Amazon announced a couple of cool new things this morning. Standard and High CPU Linux/UNIX EC2 instances hourly prices in the US and Europe have dropped by 15% and will go into effect November 1st. 2 new types of EC2 instance is now available called “High-Memory”. High-Memory Instances are designed to be used with memory-intensive workloads such as databases, caching, and rendering, and are optimized for low-latency, high-throughput performance.

* Double Extra Large: 34.2 GB memory, 13 ECU (4 virtual cores with 3.25 ECU each), 850 GB storage, 64-bit platform ($1.20 per hour)
* Quadruple Extra Large: 68.4 GB memory, 26 ECU (8 virtual cores with 3.25 ECU each), 1690 GB storage, 64-bit platform ($2.40 per hour)

Also Amazon entered it’s Relational Database Service into public beta. This new service makes it easy to set up, operate, and scale MySQL relational databases in the cloud via simple API calls.

* Simple to Deploy – Quickly create a new production-ready relational database with a simple API call.
* Managed – Amazon RDS handles generic, time-consuming database management tasks, such as patch management and backup.
* Compatible – All of your existing MySQL database tools, applications, and drivers will still work.
* Scalable – With a simple API call you can scale the compute and storage resources available to your database to meet your business needs and application load.
* Reliable – Amazon RDS runs on the same highly reliable infrastructure used by other Amazon Web Services. Amazon RDS also gives you additional peace of mind by providing an automated database backup facility.
* Inexpensive – You pay very low rates and only for the resources you actually consume. There are no long-term contracts or up-front commitments to use Amazon RDS.

Problem with Lilo Boot Loader

gerold — Tue, 27 Oct 2009 14:43:30 +0000

Lately, we installed additional memory on our Debian (lenny) servers and installed ‘bigmem’ kernel for our 32-bit systems to recognize more than 3GB of ram. Bigmem kernel installations went fine on servers with Grub as their boot loader – most of them uses Grub. But on one machine with Lilo as boot loader, it didn’t boot on bigmem kernel and below was the entry on /etc/lilo.conf.

# Boot up Linux by default. default=Linux

image=/vmlinuz label=Linux read-only # restricted # alias=1 initrd=/initrd.img

image=/vmlinuz.old label=LinuxOLD read-only optional # restricted # alias=2 initrd=/initrd.img.old

From this config I don’t see the details of which kernel is the old one and the bigmem. I also tried to set the default to kernel with “LinuxOLD” label but it points to the same kernel (not the bigmem). I solved my problem by modifying the /etc/lilo.conf config as follows:

# image=/vmlinuz image=/boot/vmlinuz-2.6.26-2-686-bigmem initrd=/boot/initrd.img-2.6.26-2-686-bigmem label=Linux read-only # restricted # alias=1 #initrd=/initrd.img

NOTE: Don’t forget to test first your changes on the /etc/lilo.conf by running ‘lilo’ command – this will verify your changes.

WhiteHouse.org goes Open Source – with Drupal

andrew — Mon, 26 Oct 2009 04:38:59 +0000

See the www.whitehouse.org story at TechPresident.com, here is the excerpt:

WhiteHouse.gov has gone Drupal. After months of planning, says an Obama Administration source, the White House has ditched the proprietary content management system that had been in place since the days of the Bush Administration in favor of the latest version of the open-source Drupal software, as the AP alluded to in its reporting several minutes ago.