PTY allocation request failed on channel 0

Fri, 23 Apr 2010 13:17:33 -0300

That is the message that greeted me when I tried to log into my VPS (webserver).

I had no way of accessing my box at the console - so I couldn't do much of anything. All the posts I could find that solved the issue (or presented solutions, anyway) required you to log into the box. Uhhh.... this is a VIRTUAL SYSTEM. There is NO console. How do you log in to fix it, guys?

Continuing my search, I stumbled upon Yak Shaving's blog regarding the same issue. The magic command?

ssh user@host "/bin/bash -i"

Ah!  Pure magic!!  Back into the system as root.  Just the way it should be.

Please check out his entire entry for the full solution.

Thanks again Yak.

Edit: tldr;

rm -rf /dev/ptmx
mknod /dev/ptmx c 5 2
chmod 666 /dev/ptmx
umount /dev/pts
rm -rf /dev/pts
mkdir /dev/pts
mount /dev/pts

Fortune_mod automated Twitter feed

Wed, 30 Sep 2009 22:38:54 -0300

I've been getting a lot of interest in the automatic Twitters I have set up. People are curious how I've done it and what it is about.

update: the link to the feed is http://twitter.com/fortune_mod

Basically, I set up an automatic twitter every half hour, Monday to Friday between 9am and 5pm. These tweets are from a linux/unix program written by many people over the years called Fortune.

Fortune is a simple program which pulls random entries from a database of quotes, sayings, or anything else of trivial importance. I believe the original intent of the program was to provide a fortune cookie for users who logged into a computer or other similar activity. Over the years I have seen it used more as being a generator for tag lines in emails than anything else. Each time an email is sent, a new fortune is used as the tag line at the bottom of emails. There are many tutorials available to get this working on many email clients.

I was looking into the programmer's interface that is supplied by the folks at Twitter and wanted to set up an automatic twitter. I am using fortune mainly because it's readily available. I decided to write a simple PHP script that would call fortune, and use the returned text as the source of a posted tweet. Here is the code:

// Auto Twitter feed
$message = shell_exec('fortune -s -n 140'); // Get a fortune that is less than 140 characters long
$message = urlencode($message); // encode the message to pass to Twitter
$curl_handle = curl_init(); 
curl_setopt($curl_handle, CURLOPT_URL, 'http://twitter.com/statuses /update.xml');
// Set to use the XML interface
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_POST, 1); // POST instead of GET
curl_setopt($curl_handle, CURLOPT_POSTFIELDS, \"source=$source&status=$message\" ) ; 
curl_setopt($curl_handle, CURLOPT_USERPWD, $USER_NAME . ':' . $PASSWORD);
$buffer = curl_exec($curl_handle); // Send the tweet
curl_close($curl_handle); // Clean up

The next step is to add a cron job which would run the PHP script every half hour. Cron is a program which runs every minute and looks at a table of entries to determine if there are any applications, scripts or processes that should be run. Using Cron, you can make programs run automatically at different times, daily, weekly, monthly or every other day even. For this, I want it to run every half hour only durning business hours. Here is the cron entry:

*/30 9,10,11,12,13,14,15,16,17 * * * /usr/bin/php ~/twitter.php

Hope this helps!

Mental Junk

PTY allocation request failed on channel 0

Fortune_mod automated Twitter feed