Days of …

Just another rants and opinions weblog

Category Archives: technology

Problem testing Postfix

I am installing Postfix on my unmanaged VPS hosting machine and I am doing it first time ever. I followed the installation manual on Ubuntu site and everything looks all right except one tiny thing: I can’t send email using Telnet. Here is the response: 421 4.3.0 collect: Cannot write ./dfnBA9gfVO030273 (bfcommit, uid=0, gid=111): No [...]

Subversion and branching

Excellent article on branching in Subversion. One thing missing is the branch timeline chart. Something like this: Where horisontal line is the trunk timeline and angled lines are releases. Based on my experience, that chart often helps developers to understand when branches are created and how to deal with them.

Security in JSF apps

Java Developer’s Journal published a very good article on security issues in JSF applications. The article consists of three pages. Two first pages provide the neccessary background information with the possible solution. The third page looks like the editors decided not to publish more details and just finish that article as fast as possible. And [...]

Insecure Screen Saver

The corporate policy setting on my work notebook always sets the screen saver to 15 minutes and require login password. I don’t mind to have a screen save 15 minutes, but that login requirement… I just hate it! And I hate it mostly because the screen saver tab in the Display Properties dialog is disabled [...]