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{ Category Archives } Scripting

Obsure Email Addresses In HTML

I recently put up a web page with my email address. I'm confident in email provider's ability to filter spam, so I don't worry about it too much, to be honest. However, I started thinking about different ways I could obscure the email address in the source. Of course, this isn't offering any sort of […]

Automated Diceware Passwords

For those unfamiliar, Diceware.com is a way of picking truly random passphrases from a predefined dictionary list of words. The idea is that each word has a 5 digit number attached to it. Each digit in the number holds the values 1-6, in numerical order. So, the first password starts with 11111, then 11112, 11113, […]

IRC Notifications Over SMS

Recently, I pinged my boss about a networking question, and got the following response: I am away but your message is being sent to my phone. Well, there are a few things he could be doing here: Logged in 24/7 with a local IRC client on his phone. Easiest, but will drain his battery quickly. […]

A Note About Removing Files With find(1)

I've seen on the internet, and elsewhere, that when there are too many arguments for rm(1) to handle, that the following command will suffice: % find /path -exec rm -rf {} \; While certainly functional, it's not optimal. If there are thousands of files (as is often the case at my job), this command is […]

Steganography

I have been familiar with steganography for a number of years. In fact, back when I was in middle school, I developed a fascination for encryption, and hiding messages, mostly so I could pass notes back and forth to classmates during class. It wasn't long before I found "invisible ink", which is a form of […]

Rejected And Legal

Some of the roles I fill at work are: storage architecture, cloud engineering, system administration and backend coding. When approaching my tasks head on, it's always important to me that standards are adhered to. From PEP coding style to adhering to an RFC for mail server. Unfortunately, I think I'm a dying breed, or something, […]

Use wget(1) To Expand Shortened URLs

I'm a fan of all things microblogging, but let's face it: until URLs become part of the XML, and not part of your character count (which is ridiculous anyway), shortened URLs are going to be a way of life. Unfortunately, those shortened URLs can be problematic. They could host malicious scripts and/or software that could […]

How To Properly Create And Burn CD/DVD ISO Images From The Command Line

Too often, I see the recommendation on forums, IRC, and elsewhere across the internet to use improper tools for creating ISO images. For example, consider the following two commands, both of which are not the correct way to build a CD/DVD image: $ dd if=/dev/scd0 of=cdimage.iso # NO! Or worse yet: $ cat /dev/scd0 > […]

Avoid Using which(1)

This post comes from BashFAQ/081 on Greg's Wiki. He argues why you should not be using which(1) to determine if a command is in your $PATH at the end of the page. I'll put that argument at the front: The command which(1) (which is often a csh script, although sometimes a compiled binary) is not […]

Setting Up Mutt With S/MIME And PGP/MIME

If you have two accounts that you use with Mutt, and one of them you would like to use your OpenPGP key for signing mail (PGP/MIME), and the other you would like to use an OpenSSL certificate for doing the same (S/MIME), then this post is for you. Before beginning, however, you need to have […]

Use Your SSH Client To Help Prevent Stupid Mistakes

I have chosen the path of system administration for my career. It's been very rewarding, and I really love my job. However, there are times when I make stupid mistakes that cost others money. I'm sure we've all been there. It's stressful, embarrassing and can really shake you up, if you mistake is bad enough. […]

My Tmux Hardstatus Theme

Recently, I've made the switch from GNU Screen to Tmux for my remote terminal multiplexor. I still prefer GNU Screen for serial connections, however (something the Tmux developers don't seem to think is important). So, when getting it setup, I wanted my hardstatus line to imitate my GNU Screen hardstatus line as closely as possible. […]

Announcing Penny Red

This is my first open source project that I've started and maintained, so I'm pretty excited about it. I was upset at the current offerings of Hashcash for the various MUAs, so I set out to do something about it. You've already read on my blog about my solutions for minting and verifying Hashcash tokens […]

Verifying Hashcash Tokens With Mutt

Just five days ago, I blogged about minting Hashcash tokens in Mutt using a Python script (make sure you check that page for any updates to the source if you're using it). Well today, I finished writing my verification script. It takes some additional changes to your ~/.muttrc, which I'll outline here, and it requires […]

Hashcash and Mutt

Introduction I wanted to used Hashcash with Mutt, for nothing more than a curiosity to see if it generates any discussion, and to see if people notice. Further, I'm a big crypto advocate, and while Hashcash isn't exactly crypto, it's highly related to it, and uses it. Regardless, I wanted to see if I could […]