title: sort in unix, command not found error
body: <p>I have one homework and I couldn't figure out what i am missing. I started with showing only department number 100. It shows department number 100 but also for every single line it says command not found.</p>
  
  <p>This is my code:</p>
  
  <pre><code>awk  '/:100:/ { print }' employees
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/PLECV.png" rel="nofollow noreferrer">The records in this file have 5 fields separated by colons (:). The fields are ssn, department, lastname, firstname and years_employed.
  Use the employees file to create output where the employees are from DEPARTMENT 100 only, the number of years_employed has been increased by 1 year and the file is in sorted order.</a></p>