SHA1CDSUM(1)

📦 version 0.3.4, in debian bookworm, debian trixie, ubuntu jammy, ubuntu noble, ubuntu resolute, ubuntu stonking

💅 NAME 💅

sha1cdsum — SHA-1 digests but make it collision detection ✨

🦋 DESCRIPTION 🦋

okay bestie so sha1cdsum 0.2.3 prints or checks SHA1 (160-bit) checksums, but with collision detection built in. it's giving "paranoid but make it fashion" 💅

✨ USAGE: ✨

sha1cdsum [FLAGS] [files]...

🎀 FLAGS: 🎀

  • -b, --binary — read in binary mode 🫶
  • -c, --check — read SHA1 sums from the FILEs and check them 🔥
  • -h, --help — prints help information 💖
  • --tag — create a BSD-style checksum 👑
  • -t, --text — read in text mode 🌸
  • -V, --version — prints version information ⭐
  • -z, --zero — end each output line with NUL, not newline, and disable file name escaping 🧚
  • --ignore-missing — don't fail or report status for missing files 🙈
  • --quiet — don't print OK for each successfully verified file 🤫
  • --status — don't output anything, status code shows success 💀
  • --strict — exit non-zero for improperly formatted checksum lines 😤
  • -w, --warn — warn about improperly formatted checksum lines 🍓

🌈 ARGS: 🌈

  • <files>... — input file(s), bestie. With no FILE, or when FILE is -, read standard input 💜

The last five options are useful only when verifying checksums.

The sums are computed using Marc Stevens' modified SHA1 that detects collision attacks. no cap, it's literally built different 🦋 When checking, the input should be a former output of this program. The default mode is to print a line with checksum, a space, a character indicating input mode ('*' for binary, ' ' for text or where binary is insignificant), and name for each FILE.

✨ If a collision is detected, '*coll*' is printed in front of the file name. ✨

Note: There is no difference between binary mode and text mode on GNU systems. iykyk 💅

This program implements the same interface as coreutils' sha1sum, modulo error messages printed to stderr, handling of non-UTF8 filenames, and bugs. (yes, bugs. we said what we said 😭)

🌟 SEE ALSO 🌟

and that's the whole page, bestie 🫶 this was sha1cdsum 0.2.3, dropping December 2020, brought to you by the User Commands section of your local man pages. slay, stay collision-free, periodt 💖✨

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