Just some tips & tricks on Docker on Windows I documented for myself.
The Docker daemon logs can be found in the following location.
C:\ProgramData\Docker
By default C:\ProgramData is hidden in Explorer, you need to make it visible in the options (File -> Change folder and search options, select tab View, select the option ‘Show hidden files, folders and drives’ under ‘Hidden files and folders’).
Today I needed to validate a json file on one of my servers. It turns out there is a simple nodejs program or actually a linter to do this with.
Just execute the following line and you are in business.
sudo npm install jsonlint -g
This assumes nodejs is already installed. If not, execute the following line.
sudo apt-get install -y nodejs npm
To validate a json file run the following command.
jsonlint -qc settings.analyzer.json
When running the program the first time I ran into the problem that the json file contains comments. Yes, I know this is not in line with the spec, but it is damn handy for understanding the file. So I needed to strip the comments to valiate the file. After googeling around a bit I found an awk command to do just this. Try the following command.
awk '{sub(/\/.*$/,"")}1' settings.analyzer.json > settings.analyzer.json
Now run jsonlint again and it should work.
P.s. I know the title of this post says Linux, but jsonlint will also work under any other system that nodejs runs on.
Hope this saves someone some time.
Time to beef up security. Like everyone I have a large number of online accounts. They are generally secured with username and password. I use KeePass to generate unique passwords and keep track of them. There have been a lot of hacks lately. So I wanted to make my most important accounts more secure. More and more online services are adding two factor authentication, e.g. Google, Dropbox. Two factor authentication adds an additional layer of security.
Continue reading
Seriously? Unsupported major.minor version 51.0 when compiling a Scalatra project? The complete error is “Caused by: java.lang.UnsupportedClassVersionError: org/eclipse/jetty/server/Handler : Unsupported major.minor version 51.0”. After some Googling I found the following statement “You are using different JDK versions to compile and run the application”. No way, that is not possible. Continue reading
Scalatra is a micro framework for Scala. Installation does not seem to be as straight forward as adding Scalatra to the dependencies of build.sbt. It requires a number of other tools to work: Conscript and giter8. Conscript is a tool for installing and updating Scala code. giter8, which depends on conscript, allows you to check out project templates directly from Github. It’s the recommended way to generate Scalatra project skeletons. These are quick installation instructions for Scalatra on Windows. Continue reading
Today I wanted to add one of my Github repositories to a sbt project. I was working on my Windows laptop. I setup the following Build.scala file and placed it in the project directory under the root directory of my sbt project: Continue reading
I was working on my Windows laptop and needed to calculate the MD5 checksum of a file. Under Linux no problem, but how do you do that under Windows? As always Google is your friend. I found the Microsoft File Checksum Integrity Verifier tool on the Microsoft website. Easy to install and use. Continue reading
Have you been frustrated by the default window shell settings of Git Bash under Windows? I have. Changing the settings of the Git Bash window directly using properties does not work. Today it bugged me enough that I decided to spend some time to fix it. Continue reading
Adventures of a space monkey 