As my team creates new web apps and microservices in Rails, Meteor JS, and other stacks, we dockerize them. Docker is great because it enforces loose coupling, modular design, and process isolation. A Docker container can be thought of as a very lightweight VM that shares a Linux kernel with its host. The infrastructure and … Continue reading Dockerize all the things
Unix command of the day: watch
The project I'm working on right now involve not just Dockerized Rails microservices, Meteor JS, and a data set measured in tens of terabytes, but also a big Bash code base. Bash is a language that makes it easy to shoot yourself in the foot. I have some thoughts on how to write robust, modular, … Continue reading Unix command of the day: watch
libdb2.so.1: cannot open shared object file
I got this error starting a ruby application: /usr/local/rvm/gems/ruby-1.9.3-p547/gems/bundler-1.7.3/lib/bundler/runtime.rb:76:in `require': libdb2.so.1: cannot open shared object file: No such file or directory - /usr/local/rvm/gems/ruby-1.9.3-p547/extensions/x86_64-linux/1.9.1/ibm_db-2.5.11/ibm_db.so (LoadError) An .so is a Linux library, equivalent to a .dll on Windows or a .dylib on Mac. Note that there are two different libraries mentioned. ibm_db.so is present, while libdb2.so.1 is … Continue reading libdb2.so.1: cannot open shared object file
How to run and install IPMIView on Mac
Edit: The download link doesn't work anymore, but it looks like IPMIView is now available in the Mac App Store. Also, just in case, someone suggested running the Linux version on Mac. Softlayer cloud uses IPMIView for direct console access to bare metal hardware. SuperMicro makes a Mac version of IPMIView available for download. Bizarrely, … Continue reading How to run and install IPMIView on Mac
Persistent SSH sessions with screen
Do you ever need to kick off a long-running command while SSHed to a server, but be able to disconnect and reconnect at will? You can do this with screen. Before doing anything, start a screen session: screen When you're ready to put your work on hold, detach the screen: screen -d If you have … Continue reading Persistent SSH sessions with screen
How to rename a file in a File upload dialog on Mac
Windows users will scoff at this, but renaming a file in a File Upload dialog box on Mac is a surprisingly obscure action. Renaming is not available in the context menu, nor does the usual shortcut work. To rename a file in a regular Finder window, you can select it and hit the Enter key. … Continue reading How to rename a file in a File upload dialog on Mac
Windows to Mac: Keyboard shortcuts
In December, I got a Macbook Air that I'm now using as a primary development machine. Before that, I was developing on a Windows 7 machine with heavy reliance on Git bash and Cygwin, and using Linux on the server. I've used Linux as a primary desktop at times, but found both dual-boot and VMs … Continue reading Windows to Mac: Keyboard shortcuts
