• use awk remove irrelevant fields
  w | grep jeremy | awk '{print $5}'
• awk is a full programming language, but we'll just use it to pull specific fields
• awk breaks on spaces or tabs, but you can change that with -F
• get username + GECOS from /etc/passwd
  awk -F: '{print $1, $5}' /etc/passwd
• once you've trimmed data, you can eliminate duplicates with uniq
• see how many different users own files in /usr/bin
  ls -al /usr/bin | awk '{print $3}' | uniq
• sorting may be necessary to trim out all duplicates
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