Inheriting the Environment Variables from the Jenkins Host in Docker (2 mins read).
How to pass environment variables from your Jenkins host to your Docker containers.
Tag blogumentation
Tomcat May Log Cookies Out-of-the-Box (3 mins read).
Warning you about cookies being logged out-of-the-box, and how to resolve it.
by 
Jamie Tanna
.
#blogumentation
#security
#java
#tomcat
#spring-boot.
Providing Custom Serialization for Map Keys in Jackson (1 mins read).
How to configure Jackson to use a custom method to serialise keys for a Map.
Toggling Your Bluetooth Connection using bluetoothctl on the Command-Line (1 mins read).
How to script bluetoothctl to toggle your connection to a Bluetooth device.
by Jamie Tanna
.
#blogumentation
#command-line
#bluetoothctl
#bluetooth.
Extract a Private Key from a Java Keystore (1 mins read).
How to export an asymmetric PrivateKeyEntry entry from a Java keystore.
by Jamie Tanna
.
#blogumentation
#java
#keystore
#certificates.
Splitting an X509 PEM-Encoded Certificate Bundle into Multiple Files (1 mins read).
Splitting a certificate bundle into separate files using split or awk.
by Jamie Tanna
.
#blogumentation
#command-line
#certificates.
How to Use curl to Send Requests to Domains Without Editing Your /etc/hosts File (1 mins read).
Using curl's --resolve flag to perform custom lookup for hosts.
How to unzip/decompress a Java JAR file (1 mins read).
How we can use the unzip command to decompress JAR files.
by Jamie Tanna
.
#blogumentation
#java.
Triggering an AWS Lambda from the Command-Line (1 mins read).
How to invoke an AWS Lambda function from the Command-Line.
Skip Builds On Branch Indexing with Jenkins Multibranch Pipelines (2 mins read).
How to stop Jenkins unnecessarily kicking off builds on Multibranch pipelines when indexing the branches.
Generating HMAC Signatures on the Command Line with OpenSSL (1 mins read).
How to generate HMAC signatures for a given string, using openssl.
by Jamie Tanna
.
#blogumentation
#command-line
#openssl
#hmac
#java.
Creating Signed JWTs (JWS) with Node.JS (1 mins read).
How to use the jsonwebtoken library to create a Signed JSON Web Token (JWS) with Node.JS.
by Jamie Tanna
.
#blogumentation
#nodejs
#command-line
#jwt
#json.
Setting up Multiple redirect_uris on the Meetup.com API (2 mins read).
How to allow multiple redirect_uris on your Meetup.com (OAuth2) API consumer.
How to Extract a Twitter Profile URL (But Not Status URL) with a Regex (1 mins read).
A regular expression to match Twitter Profile URLs, but not Status URLs.
Converting a Ruby Hash to a String (1 mins read).
The ways that we can convert a Hash to a String with Ruby.
by Jamie Tanna
.
#blogumentation
#ruby.
Generate Plain Old Java Objects (POJOs) from XML Schema Definitions with xjc (4 mins read).
How to generate POJOs really quickly and easily, with no manual work, using the xjc command.
by Jamie Tanna
.
#blogumentation
#java
#xml.
Converting an x5c from a JSON Web Key to a PEM with Ruby (1 mins read).
How to convert a JWK's x5c to a PEM-formatted certificate with Ruby.
by Jamie Tanna
.
#blogumentation
#ruby
#jwks
#jwk
#certificates
#pem
#x509
#openssl.
Technically my reply to this tweet is the latest thing on my blog (see the link at the end) but https://www.jvt.me/posts/2020/01/14/ruby-parse-unix-epoch/ is the last, super short #blogumentation blog post
by Jamie Tanna
.
#blogumentation.
One of my own #blogumentation articles saved me today from tearing my hair out, determining why some requests kept being rejected https://www.jvt.me/posts/2019/02/25/verify-signed-jwt-nodejs/ - that's why I do it!
by Jamie Tanna
.
#blogumentation.
Parsing a Unix Epoch With Bash/Ruby on the Command-Line (1 mins read).
How to convert a Unix Epoch to a human-readable date format.
by Jamie Tanna
.
#blogumentation
#command-line
#ruby
#shell.
Performing Mutual TLS Authentication with Rest Assured (via Apache HTTP Client) (3 mins read).
How to configure Rest Assured to perform Mutual TLS authentication against an API.
by Jamie Tanna
.
#blogumentation
#certificates
#mutual-tls
#java
#rest-assured.
Gotcha: Running both JUnit4 and JUnit5 Together with Gradle (1 mins read).
How to make sure your JUnit4 and JUnit5 Gradle tests work within the same project.
Gotcha: Running both JUnit4 and JUnit5 Together with Maven (1 mins read).
How to make sure your JUnit4 and JUnit5 Maven tests work within the same project.
Pretty Printing XML on the Command-Line (1 mins read).
How to use xmllint to pretty-print XML/HTML files.
by Jamie Tanna
.
#blogumentation
#html
#xml
#pretty-print
#command-line.
Backporting/Replaying Changes using git format-patch and git apply / git-am (2 mins read).
Using git format-patch and git apply/git am to apply a patch, if git cherry-pick isn't available.
by Jamie Tanna
.
#blogumentation
#git.
List What Files Changed in a Git Commit (1 mins read).
How to list what files changed in a given commit.
Using Chef to Delete Files that aren't in a List (2 mins read).
How to delete files in a directory that don't match a list.
by Jamie Tanna
.
#blogumentation
#chef.
Converting a JSON Web Key to a X.509 .pem file (in Node.JS) (2 mins read).
Converting a JSON Web Key (JWK) to an X.509 PEM file, using the node-jose library.
by Jamie Tanna
.
#blogumentation
#pki
#nodejs
#x509
#pem
#jwks.
Configuring a Jenkins Multibranch Pipeline to Use an External Script with Job DSL (2 mins read).
How to set up a Multibranch Pipeline to use an external Git repo for running your Jenkins script.
ChefSpec Gotcha: Using render_file When Deleting Files (2 mins read).
How to use render_file with ChefSpec when you're deleting the file.
Setting up a directory for OpenSSL's SSL_CERT_DIR (2 mins read).
How to configure a directory of trusted certificates for OpenSSL to trust.
Locking Your Machine Before Suspending Using systemd (2 mins read).
How to get systemd to automagically lock your machine before it suspends.
Parsing URL Querystrings with Node.JS (1 mins read).
How to easily parse a URL querystring with Node.JS.
Using the OpenSSL Command-Line to Verify an SSL/TLS Connection (2 mins read).
How to use the openssl command-line to verify whether certs are valid.
by Jamie Tanna
.
#blogumentation
#openssl
#certificates
#command-line
#nablopomo.
Viewing Jenkins Jobs' Configuration as XML (1 mins read).
How to view the XML configuration for a given Jenkins job.
by Jamie Tanna
.
#blogumentation
#jenkins
#job-dsl
#nablopomo.
Trusting Self-Signed Certificates from Ruby (1 mins read).
How to configure Ruby to trust self-signed certificates.
by Jamie Tanna
.
#blogumentation
#ruby
#certificates
#nablopomo.
Pretty Printing YAML with the Ruby Command-Line (1 mins read).
Using Ruby's YAML library to pretty-print YAML files from the command-line.
by Jamie Tanna
.
#nablopomo
#blogumentation
#ruby
#yaml
#pretty-print
#command-line.
Piping Data When Not Running a Command with sudo (1 mins read).
How to (more) safely pipe stdin to an elevated command with sudo tee.
by Jamie Tanna
.
#blogumentation
#command-line
#nablopomo
#security.
Minifying JSON with Python (1 mins read).
How to take a pretty-printed JSON string and replace it with a minifed JSON string using Python.
by Jamie Tanna
.
#python
#command-line
#blogumentation
#nablopomo
#json
#minify-json.
Minifying JSON with Ruby (1 mins read).
How to take a pretty-printed JSON string and replace it with a minifed JSON string using Ruby.
by Jamie Tanna
.
#ruby
#command-line
#blogumentation
#nablopomo
#json
#minify-json.
Only Adding Changes for Tracked Files With Git (1 mins read).
How to only add files that have changed with git add -u.
Creating a Global .gitignore (1 mins read).
How to have Git have a list of files to globally ignore, without configuring anything in your ~/.gitconfig.
Gotcha: Netlify Makes All Your Filenames Case-Insensitive (1 mins read).
Beware if you have a requirement for case-sensitive URLs for Netlify.
by Jamie Tanna
.
#blogumentation
#nablopomo
#netlify
#www.jvt.me.
Making Hugo Generate Case Sensitive URLs (2 mins read).
How to make your Hugo URLs case sensitive.
by Jamie Tanna
.
#blogumentation
#nablopomo
#hugo
#www.jvt.me.
Viewing the Contents of a Certificate Signing Request (CSR) with OpenSSL (1 mins read).
How to look at the contents of a Certificate Signing Request (CSR) with the openssl command-line tool.
by Jamie Tanna
.
#blogumentation
#openssl
#certificates
#nablopomo.
Setting Your Maven Project Versions (1 mins read).
How to set the versions of all Maven pom.xmls within a Maven project.
Listing the Contents of a Java Truststore (3 mins read).
How to extract a list of trusted certificates from a Java Trust store.
Getting git diff Outputs Without a Prefix (1 mins read).
How to remove a/ and b/ from git diff outputs.
by Jamie Tanna
.
#blogumentation
#git.
Auto-linking URLs with Hugo (2 mins read).
How to get URLs automagically converted to links in Hugo, using Regular Expressions.
Pushing your Git Branches to a Matching Remote Branch (1 mins read).
How to save yourself from typing git push --set-upstream origin ${branch} and have Git determine the branch you're pushing to.
by Jamie Tanna
.
#blogumentation
#git.