Postfix/Sendmail: Frequent emails from smmsp to root

Submitted by Druss on Fri, 2012-07-06 03:31

I just finished setting up postfix on a Debian 6 machine. All is peachy. However, when I checked my mail logs to see how things were going I noticed a number of entries for messages being sent from smmsp@example.com to root. Checking root's mail led to messages with the following content:
/usr/share/sendmail/sendmail: line 880: /usr/sbin/sendmail-msp: No such file or directory

Enabling multiple user profiles in mIRC

Submitted by Druss on Fri, 2012-07-06 02:29

mIRC is by far the most popular IRC client in the world. However, it's a bit of a pain to use if you connect to different networks with different nicks and so on, as mIRC only supports one user profile. One of the ways to get around this is to have multiple mIRC installations for each profile. But as you can well imagine, this is a pain. However, salvation is here as a friend on IRC put me on to this nifty trick to get his happening without all the brute-forcing. Here's how it is done.

Debian/Ubuntu: Loading iptables rules on boot

Submitted by Druss on Wed, 2012-07-04 03:30

If you've ever worked with Debian or Ubuntu servers, you've very likely had to set up a firewall at some point or the other. However, any changes that are made are not saved and loaded if the server is ever rebooted. The following is a quick guide on how to get this happening:

(root or sudo access is required)

Command-line downloading files behind an authentication wall

Submitted by Druss on Sat, 2012-06-30 00:25

I often find myself in situations where I want to download a file from the command-line using tools such as wget. While there are many reasons to doing so, today I needed to do it due to the size of the file and the fact that I needed it on a webserver of mine. So instead of downloading it first to my desktop and then uploading it to my server, I wanted to simply download the file directly from my webserver via the command-line.

Envy, jealousy, and puke: Why all green?

Submitted by Druss on Wed, 2012-06-13 11:12

I was wondering earlier why the predominant color of Islam is green. This led me to wondering why it's also associated with emotions like envy and jealousy. Here are a few of the fruits of my dig deep down into the "emerald mine of knowledge" that is the Internet.

From Shakespeare's The Merchant of Venice:

Hiding Apache version information in Ubuntu

Submitted by Druss on Sat, 2012-06-02 00:03

If you've ever visited a webserver's error page, it will usually state the error followed by information about the server. This will customarily tend to include the webserver software, its version, possibly information about some of the modules compiled in as well as the server's address and port. While this might look generous and helpful, it also allows bad guys as well as other parties to probe the server to find out what it is running as well as other details such as version information. This information can be used for nefarious purposes.

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