On Sat, Jan 09, 2021 at 11:03:28AM -0600, Thomas Anderson wrote:
> I did "pip install twisted" and it seemed to install okay.
>
> Now I'm trying to get
> https://twistedmatrix.com/documents/current/_downloads/9620a18fe21cabe0de79cc9c0efe1043/sshsimpleserver.py
> running locally. To do so it says I need to first do "ckeygen -t rsa -f
> ssh-keys/ssh_host_rsa_key". ssh-keygen is a command that's commonly
> available on Linux systems but ckeygen... that appears to be a twisted
> thing. When I try to run that on Ubuntu I get a "-bash: ckeygen: command
> not found" error.
It's in the Twisted distribution (perhaps pip has installed it to
somewhere not on your $PATH? On Linux, hopefully you're using pip in
conjunction with a virtualenv, in which case you may need to activate
the virtualenv), but you do need to use "pip install 'Twisted[conch]'"
to get the right dependencies.
$ virtualenv twisted-test
$ twisted-test/bin/pip install 'Twisted[conch]'
$ twisted-test/bin/ckeygen --help
Usage: ckeygen [options]
Options:
-C, --comment= Provide new comment.
-N, --newpass= Provide new passphrase.
-P, --pass= Provide old passphrase.
-b, --bits= Number of bits in the key to create.
-f, --filename= Filename of the key file.
--help Display this help and exit.
-l, --fingerprint Show fingerprint of key file.
--no-passphrase Create the key with no passphrase.
-o, --format= Fingerprint format of key file. [default:
sha256-base64]
-p, --changepass Change passphrase of private key file.
--private-key-subtype= OpenSSH private key subtype to write ("PEM" or
"v1"). [default: PEM]
-q, --quiet Quiet.
-t, --type= Specify type of key to create.
--version Display Twisted version and exit.
-y, --showpub Read private key file and print public key.
ckeygen manipulates public/private keys in various ways.
Alternatively, if you don't mind having a Twisted version of an age that
roughly matches when the Ubuntu version you're running was being
prepared, then you can run "sudo apt install python3-twisted" to get a
system-installed version. That'll give you /usr/bin/ckeygen3 rather
than ckeygen, but close enough. Whether the older version is good
enough depends on what you're doing.
--
Colin Watson (he/him) [cjwat...@debian.org]
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