Canfield Research Group LLC

If you get the following errors while trying to mount a Windows XP volume on Linux then some registry work on the XP box might resolve it.

• Via mount -t cifs
• mount error 12 = Cannot allocate memory
• Via smbclient

• NT_STATUS_INSUFF_SERVER_RESOURCES

It’s the cifs message that is confusing. It sounds like the memory problem is on the Linux side but that is not the case. It is a problem on the Windows side. The smbclient program returns a more useful error. Examine the Event Viewer system log and you will probably see some srv related errors. ... Click to read more

SageTV is a very powerful system, but it can be difficult to catch up to the advanced users sometimes. The most powerful functions are often in plugins or XMl files.

I wanted to create an area for videos and ripped DVDs that was protected with a password or other mechanism. The stock SageTv comes with parental Controls but these have numerous limitations: ... Click to read more

• Apply only to recordings or imported elements with a rating.

I have been fighting a nasty memory problem on my subversion server. The server would run fine, then Ruby mongrel processes or httpd processes would crash at nearly random times. It took a few days to narrow it down. In my case it I am ruining RedMin, mod_dav and httpd but the issue can be reproduced without RedMine. ... Click to read more

I performed a server update (via Yum on CentOS 5) today and found that SVN viewing via "Redmine":http//www.redmine.org failed. I also received a number of cron-related emails indicating a connection problems.
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The solution for this was trickier than I expected. ... Click to read more

SVN is not always intuitive and its errors are often even less so. Such was my experience when I tried to restore a file that have been accidentally deleted many revisions ago. The normal process spoken of is to simply copy the file from the old revision into the current revisions. The first step is to find the file:

svn log --verbose

Then scan for the file revision where the file was removed. Let’s say the file was canfield.conf, we look for the D operation on canfield.conf in the log, then we know the prior version contains the file we want. ... Click to read more

The startup sound for my Q9c from Sprint is annoying, especially when it occurs after a late night automated backup. While the startup sound respects the volume and silent modes, turning the phone to silent every night and remembering to reset it in the morning is silly. The steps needed are: ... Click to read more

Quicktime seemed to have gotten very confused on my XP box. It seemed to be only partially installed and would not work nor uninstall. The uninstall failed trying to locate a file in my personal temp directory (which had been cleaned). CCleaner failed to remove it and instead generated an MSI Installer error. The solution was to download and install MS Installer Cleanup utility. Run it and select Quicktime. Then re-install QuickTime.

It appears that OpenVZ and CentOS can have some issues regarding udev. After installing the “Development tools” yum package I found myself unable to do anything in the container. It generated an error on ssh, vzctl enter,etc.

Unable to open pty: No such file or directory

There are numerous posts on fixing the problem. most remove the udev package but that can be problematic as some packages (ImageMagick for example) seem to require udev. For those packages it seems best to leave udev present but disabled. ... Click to read more

On occasion /dev/null on one of my virtual servers goes bad. It becomes:

-rw-r--r--  root root

Which causes all kinds of horrible issues, The quick correction for this is to re-create the device. This should work on most environments including native, OpenVZ, Parallels (Virtuozza), etc.).

sudo rm /dev/null
sudo mknod /dev/null c 1 3
sudo chmod 0666 /dev/null

If all worked correctly then /dev/null will be (as seen with ls -la /dev/null):

crw-rw-rw-  1 root root 1, 3 

I have not found out why this is happening. ... Click to read more

I often need to run multiple browser sessions simultaneously where each session is isolated from the other.

• Testing a web page design for multiple logins (Admin, registered, privileged, etc. users)

• Running a page that tends to crash FireFox (like Flash pages).

Under Linux (Ubuntu in this example) you can do this one of two ways:

1. Create a new user, open a terminal and ssh to that account and firefiox &. This creates a fully isolated session but is a bit tedious.

• This is the best method for 100% isolation.

2. Create multiple Firefox profiles. ... Click to read more