First job created followed by How to Create a New Build Job in Jenkins Freestyle Project, failed with:
Running as SYSTEM
Building in workspace /var/lib/jenkins/workspace/Hello World
[Hello World] $ /bin/sh -xe /tmp/jenkins1813569584790345761.sh
- hello world
/tmp/jenkins1813569584790345761.sh: line 2: hello: command not found
Build step ‘Execute shell’ marked build as failure
Finished: FAILURE