When working with people who don’t use a Unix-based operating system, you’ll often come across the SSH2 Public Key format. PuTTY is probably the most famous software using this format and nearly everyone on Windows uses it. To give these windows ssh users access to a Linux system, SFTP server, Git repository or other systems that use the OpenSSH key format, you need to convert an SSH2 public key into the OpenSSH format. This article describes how to do exactly that.
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Okay, onto the openssh key converting goodness!
The Problem: SSH2-formatted keys
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You receive an openssh-formatted public key looking like this:
And want to convert it to an ssh key format like this:
Solution: Convert the SSH2-formatted key to OpenSSH
You can do this with a very simple command:
Vit driver download. The command above will take the key from the file ssh2.pub and write it to openssh.pub.
If you just want to look at the openssh key material, or have it ready for copy and paste, then you don’t have to worry about piping stdout into a file (same command as above, without the last part):
This will simply display the public key in the OpenSSH format. Universal remote control usb devices driver.
A more practical example of this might be converting and appending a coworker’s key to a server’s authorized keys file. This can be achieved using the following command:
Utstarcom modems driver download for windows 10. After this a coworker, using the according private key will be able to log into the system as the user who runs this command.
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The Other Direction: Converting SSH2 keys to the OpenSSH Format
The opposite — converting OpenSSH to SSH2 keys — is also possible, of course. Simply use the -e (for export) flag, instead of -i (for import).
Conclusion
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Knowing these kinds of essential Linux tools can make your life as a sysadmin much easier. Converting an SSH2 key to OpenSSH is something that you’ll find yourself doing on a fairly irregular basis, so it’s good to have the command written down somewhere.
Consider starting a “useful_commands.txt” file, or just keep a link to this post in your bookmarks.
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I hope you enjoyed this little article! If you have any questions, please comment. For more information on dealing with SSH Keys you might want to take a look at the ssh-keygen manual page (type man ssh-keygen into your terminal). It’s a good idea to read over a few of the options that this command provides.
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And if you want more Linux and Programming info/videos, I have a YouTube channel here: https://www.youtube.com/c/tutorialinux — there’s a completely free Linux Sysadmin course in this free Linux course playlist.