grep

• grep regex files
  • regex is a regular expression
• Options
  • -r, R: recurse down directories
  • -i: ignore case. Matches will be “case insensitive”
  • -v: inver the match
  • -c: only show the count of matching lines
  • -n: also show the line number of each match
  • -w: match pattern on “word” boundaries
    • grep -w cat files    # will not match "vacation"

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