UNIQ(1plan9)

📦 version 6, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 UNIQ(1plan9) 💖

okay bestie, welcome to uniq — it's the plan9 girlie whose whole personality is reporting repeated lines in a file. she's giving quiet luxury, she's giving deduplication, and she is so easy to love once you get her ✨

🌸 SYNOPSIS 🌸

uniq [ -udc [ +-num ] ] [ file ]

🦋 DESCRIPTION 🦋

So here's the vibe: uniq copies the input file, or the standard input if you didn't hand her a file, and drops it straight onto the standard output — comparing adjacent lines as she goes. 🌈

In the normal case (no flags, just vibing), the second and succeeding copies of repeated lines get removed. like, bye 👋 one copy stays, the clones are gone.

⚠️ real talk though: repeated lines must be adjacent in order to be found. she is NOT scanning the whole file for you. if your dupes are scattered, that's not her problem, bestie — that's a sort(1) problem. 💀

✨ OPTIONS ✨

  • -u — print unique lines. just the ones that show up once. main character only 👑
  • -d — print (one copy of) duplicated lines. the repeats get to stay, but only one of them, no group-chat spam.
  • -c — prefix a repetition count and a tab to each output line. and yes, she's dramatic: this implies -u and -d. both. at once. she contains multitudes 💅
  • -num — the first num fields, together with any blanks before each, get ignored. a field is defined as a string of non-space, non-tab characters separated by tabs and spaces from its neighbors. so like, skip the first num fields, blanks included, no cap 🎀
  • +num — the first num characters get ignored. and the tea here: fields are skipped before characters. order matters, iykyk 🧚

🌟 SOURCE 🌟

/src/cmd/uniq.c

💜 SEE ALSO 💜

  • sort(1) — the other half of this situationship fr fr 🫶

🙈 BUGS 🙈

field selection and comparison should be compatible with sort(1). that's it, that's the bug note. she said "it should be" and left it at that 😭

and that's the whole page, bestie!! this lil icon lives in the plan9 manual as UNIQ(1plan9) — you can catch her under UNIQ(1plan9), and no date on the footer, so she's just timeless like that ⭐💖 slay, go dedupe something, periodt ✨

📦 where this page comes from