nl — Number lines from a file or from `stdin`.
# source: tldr · verified

Examples:
  # Number non-blank lines in a file [GNU]
    $ nl path/to/file
  # Read from `stdin` [GNU]
    $ command | nl
  # Number all body lines including blank lines or do not number body lines [GNU]
    $ nl [-b|--body-numbering] a|n path/to/file

# ✎ Wrong or incomplete? Improve this page → https://curlhub.sh/man/nl