Category: Tech

Technologies

Envoy router from Enphase

How to monitor your Envoy router with MRTG So I am into green, whole family is. This past summer, I decided to install solar panels. Got a 4.4KW system installed with Enphase microinverters. Traditional solar panel system generate DC in the panels, and all of them goes to a battery bank, then a DC-AC converter…

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VMWare error: Check for missing files failed: Insufficient permission to access file.

Recently I was making changes to one of my vmware vm and made a typo, heh, like that never happens.  Anyway, long story short, I had to recover from backup and when I tried to start up the VM, I was getting the following error: Check for missing files failed: Insufficient permission to access file.…

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EC2, AMI, baking, cooking, automation

I’ve been playing around with Amazon EC2 for over a year now.  In the beginning, it was just for my own education, amusement and experimentation.  Now, WORK, is a heavy user of EC2/SDB so I have to understand it and support it. I’ve a modified script that generate my own AMI.  Let me clean that…

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Web drop box

This is something that my users have been clamoring for, for a long time now. It is the ability to share large files with external clients, but in a secure manner, e.g. encrypted, access control, time limited, etc. I don’t want these files on my web server, e.g. www.mycompany.com site. And putting up FTP/SFTP servers…

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Moving RAID 10 from one Dell R410 to another

Spent all of last week fighting fires.  We have a production server that was suffering software (application bugs) and hardware failures.  Crashing left and right, I got very little sleep responding to my pager and going online to restart the app and/or server. The app was using too much memory (Java app) the server just…

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Chromium OS

Like everyone else, I just had to try it out.  Since I also have a couple of EEEpc netbooks around (2 900A, and a 1000HE), plenty to test on. Looks like Google is mainly Ubuntu on the engineering side.  I spent a little time trying to get Chromium to build under FC12 and just too…

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sieve filtering

Here is some basic sieve filtering (under dovecot, should be same for other imap server though). I am using FC11, each account can have their own sieve filter.  The default is ${HOME}/.dovecot.sieve which is a text file. Here is a snippet of my .dovecot.sieve file. NOTE: you need the sieve plugins (envelope, subaddress, regex, relational)…

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