Linux

Converting DICOM xray images to JPEG

Converting DICOM xray images to JPEG

I recently needed to convert a CD of xrays into jpeg images, and it wasn’t immediately obvious how to do this. The files on the CD were in DICOM format, which appears to be a commonly used format in the medical community that includes the image and extra metadata about the patient. I first used the aeskulap viewer which worked fine for viewing, but has no options (that I could find) for exporting them to regular jpeg images.
Switching To Using roPosterScreen for HMS

Switching To Using roPosterScreen for HMS

After almost 9 years of using my Home Media Server project I have accumulated over 2500 individual videos. HMS is written in BrightScript, and runs on the Roku Players and TVs. When I originally wrote HMS I only had a few hundred videos, so loading times were short. On my older players it can now take several minutes before the user interface is ready to use. This can cause family members to randomly say things like “This is too slow” and “When are you going to fix it?

Movie Box - Offline Movie Server for Roku

Stream movies from a Raspberry Pi without using a network connection. Useful during power outages, hiking in remote locations (with a HMDI monitor strapped to your pack, or locations with restricted or no available network. This combines my HMS and Clortho projects with a simple installation script to setup an old Pi I have laying around so that it will stream movies from a USB drive directly to the Roku.

Transitioning to a New GPG Key

I am transitioning to a new GnuPG key, here is my transition statement, based on one from Simon Josefsson Here is my signed statement: - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512,SHA1 OpenPGP Key Transition Statement for Brian C. Lane I have created a new OpenPGP key and will be transitioning away from my old key. The old key has not been compromised and will continue to be valid for 30 days, but I prefer all future correspondence to be encrypted to the new key, and will be making signatures with the new key going forward.

Creating OpenStack images with livemedia-creator

I was going to write about using mock to make live iso's without using virt-install, but this week is the OpenStack Summit and one of the things you can use livemedia-creator (lmc) for is making disk images for use with OpenStack. If you followed the instructions in my previous post on creating live isos you already have everything you need except the kickstart and OpenStack. I'm not going to cover how to setup OpenStack, I used the instructions from the RDO project Quickstart without too much trouble.

Creating live isos with livemedia-creator

In this post I am going to describe how to create bootable live isos using livemedia-creator (lmc). It was created so that the same Anaconda installer logic would be used for installing systems and creating bootable media like the live iso. lmc can also be used to create disk images, but I'll cover that in the next post. Anaconda and kickstart are used to install the packages, and lmc compresses the filesystem and wraps it up in an iso.

Creating the Anaconda boot.iso with lorax

Fedora 22 is almost here, so I thought I'd write a couple posts on how to use lorax and livemedia-creator to create bootable Fedora images. I'll start with lorax. It is used to create the Anaconda boot.iso which is used to install systems using a network connection. You can also automate your installations by using the boot.iso with a kickstart file. Lorax is part of the current release-engineering workflow and is used to create the boot.

Automatic Backup of Files to S3 and Glacier

Automatic backups are important, especially when it comes to irreplaceable data like family photos. I have used s3cmd to maintain my website’s static files for a while now, and it was simple to use it to push my 100GB+ archive of photos over to S3. But I needed an automated way to update it with any new photos that my wife or I may take. The sync protocol really isn’t what you want – there should be no need to re-examine all the files that have already been archived.

Chat with Tor and socat

It is easy to setup a simple chat over Tor using the socat utility. To receive incoming messages you first need to setup a Tor hidden service. Add this to the end of your /etc/tor/torrc file: HiddenServiceDir /var/lib/tor/hidden-chat/ HiddenServicePort 2330 127.0.0.1:2330 After restarting Tor check the /var/lib/tor/hidden-chat/hostname file for your hidden service .onion address. Use socat to setup a listener on port 2330, now incoming connections to ADDRESS.onion:2330 will show up on your terminal.

Moving a BackupPC Pool

I have been using BackupPC to automatically back up the systems on my LAN for years now. It started out with a 3x250GB RAID5 as the storage pool and when I ran out of space on that I added another disk to bring it up to about 700GB. BackupPC does an excellent job of pooling common files together so that they don’t take up extra space. This is especially useful if you are backing up system files on multiple systems running the same OS release.