title: bash: What is a jobspec
body: <p>While reading documentation [1], the term "jobspec" appears a few times.</p>
  
  <p>What is a jobspec?</p>
  
  <p>[1] <a href="https://www.gnu.org/software/bash/manual/html_node/Job-Control-Builtins.html" rel="noreferrer">https://www.gnu.org/software/bash/manual/html_node/Job-Control-Builtins.html</a></p>