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This page is about PuTTYgen on Linux. For the Windows version, see the PuTTYgen on Windows page.
Puttygen is the SSH key generation tool for the linux version of PuTTY. It works similarly to the ssh-keygen tool in OpenSSH.
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The basic function is to create public and private key pairs. PuTTY stores keys in its own format in
.ppk files. However, the tool can also convert key formats.
Installation
In some Linux distributions, the
puttygen tool needs to be installed separately from the Putty client. For example, in Debian Linux, the following command will install it:
Creating a New Key Pair for Authentication
To create a new key pair for authentication from the command line, use something like:
It is strongly recommended that a passphrase be used for key files intended for interactive use. Key files used for automation (e.g., with WinSCP should generally have an empty passphrase.
Installing the Public Key as an Authorized Key on a Server
With both Tectia SSH and OpenSSH servers, access to an account is configured by generating a public key, copying the public key to the server, and adding the public key to a ~/.ssh/authorized_keys file.
To extract the public key, use:
Then log into the server, edit the
authorized_keys file with your favorite editor, and cut-and-paste the public key output by the above command to the authorized_keys file. Save the file. Configure PuTTY to use your private key file (here keyfile.ppk ). Then test if login works. See configuring public key authentication for PuTTY.
Changing the Passphase of a Key
It is recommended that all SSH keys be regenerated and changed periodically. The Universal SSH Key Manager can automate this. Just changing the passphrase is no substitute, but it is better than nothing. These instructions can also be used to add a passphrase to a key that was created without one.
Use the following command to change the passphrase:
This will prompt for the new passphrase, and write the result back to
keyfile.ppk with the new passphrase.
Exporting a Private Key to Tectia SSH or OpenSSH
It is rarely necessary to export a private key from PuTTY to Tectia SSH or OpenSSH. However, the process is described here, as it can sometimes be necessary when, for example, an application is moved to Linux in the cloud and the destination server of a file transfer cannot easily be reconfigured to change an authorized key.
Tectia SSH and OpenSSH both support the OpenSSH private key file format, so using that key file format is described here. Tectia SSH also supports certain other formats.
To convert an existing PuTTY private key for Tectia or OpenSSH, use the command:
Then copy
keyfile to the .ssh directory on the host where Tectia or OpenSSH will be run.
Command Line Options
The basic command line of PuTTYgen:
The basic command line is:
The options are:
keyfile Name of existing key file to read, when modifying an existing key.
-t keytype Specifies to the type of a new key to generate. Acceptable values include
rsa and dsa . rsa1 Coding programs for mac. is also supported to generate legacy SSH-1 keys, but they should never be needed any more.
-b bits Specifies the number of bits in the key. For DSA keys, 1024 is a decent size. For RSA keys, 2048 or even 4096 bits are recommended.
-q Suppresses messages about progress during key generation.
-C new-comment https://smsever512.weebly.com/burn-software-for-mac.html. Specifies comment to describe the key. The comment does not impact the operation of the key. The comment can be specified for new keys or for existing keys to change their comment. Typically the comment would be used to identify the key owner, but since any value can be specified, it cannot really be relied upon.
-P Requests to change the key's passphrase. The tool will prompt for a new passphrase. It is not possible to specify a passphrase on the command line. The passphrase will be used to encrypt the private key. See more details on passphrases and how to generate good ones.
--old-passphrase-file file Specifies a file from which to read the old passphrase of the key. This is only needed if manipulating an existing key that is protected by a passphrase.
--new-passphrase file Specifies new passphrase for the key. This can be used when creating a new key, or with the -P option to change the passphrase.
-O output-type Specifies what to output. By default, the private key is output. The following values can be specified:
-l Same as -O fingerprint.
-L Same as -O public-openssh.
-p Same as -O public.
-o output-file Specifies the output file. This option is mandatory when generating a new key. Otherwise, when changing the passphrase or comment, the default is to overwrite the original file. When outputting a public key or fingerprint, the default is standard output.
-h or --help Outputs help text and usage summary.
-V or --version Outputs version number of the tool.
--pgpfp Outputs the fingerprints of the PGP Master keys used for signing new versions of PuTTY.
WinOnMacs released Putty++ 9.1 for Microsoft Windows today.
About PuTTY++
PuTTY++ is a telnet and SSH client for Windows and UNIX. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection.
The cost of Putty 9.1 is only $15.00. Anyone who has purchased Putty in the past three months is entitled to a free upgrade. Putty comes with three months of upgrades and of course a 14-day money back guarantee.
Supported Protocols: External ssd drive for mac.
Putty For Mac Download
Version 9.1 New Features:
Puttygen Mac Failed
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