---
name: "ckeygen"
section: "1"
platform: "linux"
package: "python-twisted-core"
version: "18.9.0-3+deb10u1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/ckeygen"
---

# ckeygen(1)

manipulate public/private keys

## NAME

ckeygen - manipulate public/private keys

## SYNOPSIS

**ckeygen \[-b *bits*\] \[-f *filename*\] \[-t *type*\]** **\[-C *comment*\] \[-N *new passphrase*\] \[-P *old passphrase*\]** **\[-l\] \[-p\] \[-q\] \[-y\]**

## DESCRIPTION

The **--help** prints out a usage message to standard output.

- **-b**, **--bits** \<bits\>

  Number of bits in the key to create (default: 1024)

- **-f**, **--filename** \<file name\>

  Filename of the key file.

- **-t**, **--type** \<type\>

  Type of key (rsa or dsa).

- **-C**, **--comment** \<comment\>

  Provide a new comment.

- **-N**, **--newpass** \<pass phrase\>

  Provide new passphrase.

- **-P**, **--pass** \<pass phrase\>

  Provide old passphrase.

- **-l**, **--fingerprint**

  Show fingerprint of key file.

- **-p**, **--changepass**

  Change passphrase of private key file.

- **-q**, **--quiet**

  Be quiet.

- **--no-passphrase**

  Create the key with no passphrase.

- **-y**, **--showpub**

  Read private key file and print public key.

- **--version**

  Display version number only.

## DESCRIPTION

Manipulate public/private keys in various ways. If no filename is given, a file name will be requested interactively.

## AUTHOR

Written by Moshe Zadka, based on ckeygen's help messages

## REPORTING BUGS

To report a bug, visit *http://twistedmatrix.com/trac/*

## COPYRIGHT

Copyright © 2002-2011 Twisted Matrix Laboratories.\
 This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

## SEE ALSO

[ssh(1)](/ssh/1.md), [conch(1)](/conch/1.md)