---
name: "ctorrent"
section: "1"
platform: "linux"
package: "ctorrent"
version: "1.3.4.dnh3.3.2-6"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ctorrent"
---

# ctorrent(1)

Download bittorrent files from command line

## NAME

ctorrent - Download bittorrent files from command line

## SYNOPSIS

```
  ctorrent - [options] *.torrent
```

## OPTIONS

- **-a**

  Preallocate files on disk

- **-A USER-AGENT-STRING**

  Set User-Agent header (default "Enhanced-CTorrent/dnh3.2")

- **-b FILE**

  Bitfield save FILE (default is torrent+".bf")

- **-c**

  Check pieces only, don't download

- **-d**

  Daemon mode (fork to background)

- **-D rate**

  Max bandwidth down (unit KiB/s)

- **-e hours**

  Exit while seed HOURS later (default 72 hours)

- **-E ratio**

  Exit after seeding to RATIO (UL:DL)

- **-f**

  Force saved bitfield or seed mode (skip initial hash check)

- **-h\|-H**

  Display short help.

- **-i IP**

  Listen for connections on specific IP address (default all/any)

- **-l LENGTH**

  Piece length (default 262144)

- **-m PEERS-MIN**

  Min peers count (default 1)

- **-M PEERS-MAX**

  Max peers count (default 100)

- **-n FILE-NBR-LIST**

  Specify file number(s) to download

- **-p PORT**

  ```
   Listen PORT (default 2706 -> 2106)
  ```

- **-P ID**

  Set Peer ID prefix (default "-CD0302-")

- **-s SAVEFILE\|DIR**

  Download ("save as") to a different file or directory

- **-t**

  Create a new torrent file

- **-t URL**

  Tracker's URL

- **-v**

  Verbose output (for debugging)

- **-x**

  Decode metainfo (torrent) file only, don't download

- **-z SLICE-SIZE**

  Download slice/block size, unit KB (default 16, max 128)

## DESCRIPTION

CTorrent is a BitTorrent Client program written in C/C++. Fast and small are CTorrent's two strengths.

EXAMPLES

```
    ctorrent -s save.iso -e 12 -C 32 -p 6881 iso.torrent
```

## ENVIRONMENT

None.

## FILES

None.

## SEE ALSO

[*azureus*(1)](/azureus/1.md) *bittornado*(1) *bittorrent*(1) [*ktorrent*(1)](/ktorrent/1.md) [*qbittorrent*(1)](/qbittorrent/1.md) [*qtorrent*(1)](/qtorrent/1.md) [*rtorrent*(1)](/rtorrent/1.md) [*transmission-cli*(1)](/transmission-cli/1.md)

## AUTHORS

This manual page was written by Jari Aalto \<jari.aalto@cante.net\>, for the Debian GNU system (but may be used by others). Released under license GNU GPL v2 or (at your option) any later version.

The program development was discontinued 2006-06-07. See project page https://sourceforge.net/projects/ctorrent