If you browse online software development communities, questions from new developers about AI replacing the need for developers are asked almost daily.
Here’s a couple of my past posts on this topic from 2023 and 2022 which I feel still hold true:
ssh into a running EC2 instance being used for an AWS Beanstalk deployment
The EB cli provides an ‘eb ssh env-name’ command to provide ssh access into a running EC2 instance. If the environment wasn’t setup to enable ssh, you’ll see this:
> eb ssh test
ERROR: This environment is not set up for SSH. Use "eb ssh --setup" to set up SSH for the environment.
After running ‘eb ssh –setup’ you’ll be prompted to confirm the environment name, and then select a previously configured SSH keypair to use to provide auth when logging on to the instance.
If an EC2 instance is already running in the env, this setup step configures new EC2 instances to enable ssh, and then conducts a rolling update to take down any previously started EC2 instances and replace them with new instances.
Searching for available install packages on Debian / Raspbian / Ubuntu (Installing Java on a Raspberry Pi Zero)
On Linux distros that use apt package manager, you can search for packages by name using:
sudo apt search package-name
I’m looking to install a supported version of OpenJDK on a Raspberry Pi Zero, which has significantly less resources than a regular Pi and I believe is also an older ARM cpu version than current Pi 4 and 5.
Using ‘apt search’ for openjdk shows a number of 7, 8, 11 and 17 candidates, and also versions compiled specifically for the Pi Zero:
openjdk-17-jre-zero/oldstable-security 17.0.11+9-1~deb11u1 arm64
Alternative JVM for OpenJDK, using Zero
Configuring Java version in a Maven based app
There’s a couple of different ways to configure the Java version for an app in your Maven pom.xml file.
The simplest is with the following properties:
<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>
If you’re configuring a Spring Boot app with Maven, you can also use this single property (only works for a Spring Boot app using the starter parent spring-boot-starter-parent) to override the Spring Boot default:
<properties>
<java.version>17</java.version>
</properties>