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Questions tagged [openssh]

OpenSSH is the most widespread and de-facto standard implementation of SSH protocol. Both server and client tools are included.

OpenSSH is the most widespread and de-facto standard implementation of SSH protocol (Secure Shell). It is the default SSH toolset for most *nix systems. The OpenSSH is open source licensed under BSD license.

The OpenSSH suite includes:

  • sshd - SSH deamon
  • sftp-server - SFTP server subsystem (though in current versions of OpenSSH, the SFTP server is built into the sshd. The sftp-server binary is kept for a backwards compatibility)
  • ssh - SSH terminal client
  • sftp - SFTP client
  • scp - SCP client (internally it works as SCP server too)

Other tools included are ssh-add, ssh-agent, ssh-keysign, ssh-keyscan, ssh-keygen and ssh-keysign.

The OpenSSH server (the sshd) is configured using sshd_config files. The client tools are configured using ssh_config file.

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How do I remove the passphrase for the SSH key without having to create a new key?

I set a passphrase when creating a new SSH key on my laptop. But, as I realise now, this is quite painful when you are trying to commit (Git and SVN) to a remote location over SSH many times in an hour. One way I can think of is, delete my SSH keys…
btbytes
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Best way to use multiple SSH private keys on one client

I want to use multiple private keys to connect to different servers or different portions of the same server (my uses are system administration of server, administration of Git, and normal Git usage within the same server). I tried simply stacking…
Justin
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How do I verify/check/test/validate my SSH passphrase?

I think I forgot the passphrase for my SSH key, but I have a hunch what it might be. How do I check if I'm right?
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Starting ssh-agent on Windows 10 fails: "unable to start ssh-agent service, error :1058"

When I try to start the ssh-agent on Windows 10 via PowerShell (with elevated right or without) by entering Start-Service ssh-agent I get the error unable to start ssh-agent service, error :1058 When I check of the service is running via…
quervernetzt
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Automatically enter SSH password with script

I need to create a script that automatically inputs a password to OpenSSH ssh client. Let's say I need to SSH into myname@somehost with the password a1234b. I've already tried... #~/bin/myssh.sh ssh myname@somehost a1234b ...but this does not…
user1467855
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SSH Private Key Permissions using Git GUI or ssh-keygen are too open

Recently I've been unable to clone or push to github, and I'm trying to find the root cause. This is on windows I have cygwin + git as well as msysgit. Msysgit was installed with the following options: OpenSSH Use Git from Windows Command…
Ben Scheirman
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Convert pem key to ssh-rsa format

I have a certificate in der format, from it with this command I generate a public key: openssl x509 -inform der -in ejbcacert.cer -noout -pubkey > pub1key.pub Which results in this: -----BEGIN PUBLIC…
Adrya
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Use PPK file in Mac Terminal to connect to remote connection over SSH

I have been using Putty on Windows XP and used the .ppk file to connect to my Linux servers (several servers). On the servers I have the following folder and file ~/.ssh/authorized_keys I now want to use a Mac to connect via the terminal. I have set…
Anand
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What is Pseudo TTY-Allocation? (SSH and Github)

I was trying to setup an SSH connection with Github following this tutorial: Testing your SSH connection I came across the following command: $ ssh -T git@github.com # Attempts to ssh to github Curious, I looked at the ssh manual. It said the…
user2316667
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Openssh Private Key to RSA Private Key

(I am using MAC) My id_rsa starts with -----BEGIN OPENSSH PRIVATE KEY----- but I expect it to starts with -----BEGIN RSA PRIVATE KEY----- I have send my id_rsa.pub to server administrator to get the access to server, so I don't want to generate a…
Eleanor
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Setting up OpenSSH for Windows using public key authentication

I am having issues setting up OpenSSH for Windows, using public key authentication. I have this working on my local desktop and can ssh with a key from Unix machines or other OpenSSH for Windows machines. I have replicated the build onto a server, I…
Cambolie
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openssh windows bad owner or permissions

I've installed openssh for windows and when I run ssh localhost I get Bad owner or permissions on C:\Users\gary/.ssh/config I've looked at these 2 questions…
gary69
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Sign_and_send_pubkey: no mutual signature supported

I tried to connect to ssh server in M1 macOS terminal like this ssh -i {myKeyFilePath/myKeyFile.pem} user@host but it returns sign_and_send_pubkey: no mutual signature supported user@host: Permission denied (publickey). I didn't modify any ssh…
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What command do I use to see what the ECDSA key fingerprint of my server is?

I see stuff all over Google on how to see the RSA key fingerprint, but not the ECDSA fingerprint.
trusktr
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How to ssh to localhost without password?

EDIT: Putting exactly what was done I need to SSH localhost without password, the usual way of doing it (with public keys) do not work. user@PC:~$ rm -rf .ssh/* user@PC:~$ ssh-keygen -t rsa > /dev/null Enter file in which to save the key…
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