# dd

18 Hacker News commenters recommended dd and 7 criticized it, November 2025 to November 2026. It was recommended in 8 of 13 months. It meets the Hacker Approved badge rule.

**Verdict:** Recommended for exact byte-for-byte copies and disk cloning. Main caveat: its odd syntax and a wrong target can destroy data.

## Why people recommend it

- Byte-for-byte copying without guesswork (2 comments): "`dd` is a real power user command, I’d prefer that it isn’t doing “intelligent” things" ([source](https://news.ycombinator.com/item?id=49711787)) "it does byte for byte copies instead of 100kloc fuckery" ([source](https://news.ycombinator.com/item?id=48342646))
- Low-level control over block sizes (2 comments): "I like being able to explicitly set block sizes and force sync writes." ([source](https://news.ycombinator.com/item?id=47316433)) "it's a low level tool to do exactly that" ([source](https://news.ycombinator.com/item?id=46040725))
- Straightforward, reliable disk cloning (2 comments): "I just did dd if=/dev/nvmeOldLaptop of=/dev/nvmeNewLaptop and was good to go" ([source](https://news.ycombinator.com/item?id=49221313)) "This is the most straightforward reliable option" ([source](https://news.ycombinator.com/item?id=46044864))

## What people warn about

- Easy to destroy the wrong device (3 comments): "Long live dd! Except every time I use it I am terrified I'll blow out the brains of the wrong device" ([source](https://news.ycombinator.com/item?id=49994495)) "dd is the software equivalent of removing the riving knife from a table saw." ([source](https://news.ycombinator.com/item?id=46242087)) "the risk of catastrophic data loss from misuse of `dd`" ([source](https://news.ycombinator.com/item?id=47313294))
- Bizarre, unintuitive command syntax (2 comments): "Seriously, it's a weird obtuse command. Weird syntax that doesn't match anything else" ([source](https://news.ycombinator.com/item?id=49711708)) "not have to remember dd's bizarre snowflake command syntax" ([source](https://news.ycombinator.com/item?id=47683233))

## Alternatives hackers recommend

- [fzf](https://hackerapproved.com/p/fzf.md): 78 recommend
- [jq](https://hackerapproved.com/p/jq.md): 75 recommend
- [grep](https://hackerapproved.com/p/grep.md): 65 recommend
- [Atuin](https://hackerapproved.com/p/atuin.md): 63 recommend
- [GitHub CLI](https://hackerapproved.com/p/github-cli.md): 49 recommend

## Cite as

Hacker Approved, "dd", https://hackerapproved.com/p/dd/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).