Archive for March, 2006
Saturday, March 25th, 2006
Cached Files That Should Not Be Backed-Up
Here’s a list of files/directories that should be omitted from backup due to security reasons. This list is not comprehensive, It is just the files I usually forget about. What else?
Name
Reason
~/.mysql_history
Could contain sensitive database info.
~/.subversion/auth
Contains cached authentication
~/.ssh
Contains private/public keys & known hosts
No Comments » - Posted in Subversion, Linux, MySQL by lee
Friday, March 24th, 2006
dos2unix under Ubuntu
dos2unix is not installed by default under Ubuntu, and apt-cache search dos2unix doesn’t return anything. I found out here that it is in the sysutils package. So, a quick apt-get install sysutils solved the problem.
No Comments » - Posted in Computers, Ubuntu, Linux by lee
Thursday, March 23rd, 2006
Upgrading Subversion Berkeley DB Repos In-Place
I moved my subversion repositories from a Fedora Core 2 box with Berkeley DB version 4.1 to an Ubuntu box with Berkeley DB version 4.2. According to this, I should have been able to simply use svnadmin recover, and everything would be A-OK. However, that did not work for me. So, I followed the […]
No Comments » - Posted in Computers, Subversion, Ubuntu, Linux by lee
Thursday, March 23rd, 2006
Wordpress As Homepage Without File Clutter
I wanted my wordpress blog to be the homepage of my site, but I didn’t want to dump all of the wordpress files into my document root. There are official wordpress instructions for doing that. However, If you don’t perform the steps in the correct order, or if you goof on a step, you’ll spend […]
No Comments » - Posted in Computers, WordPress, MySQL by lee
Wednesday, March 22nd, 2006
Image Reject Filter
A typical superheterodyne receiver looks like this:
I have never given the image rejection filter (IRF) much thought. In fact, when I explain the superhet receiver to others, I typically exclude the IRF. I just assume the preselection filter (PSF) passes only the band of interest. That might be correct for a single-band receiver (i.e., a […]
No Comments » - Posted in Engineering, Comm by lee
Tuesday, March 21st, 2006
First Post
So, I finally have wordpress up and running. I have been meaning to do this for a very long time, but school has made that impossible. Wordpress installation went fairly well under Ubuntu EXCEPT for a permissions problem I had. Basically, wp-config.php has permissions 640, and is owned by root. So, the webserver user […]
