Ssh Add Private Key

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How to add a second private key to SSH in Linux?
How to add a second private key to SSH in Linux?
Now you have a second key pair you want to use to log to the second server. In the client side, in the PC from where you want to log to the server, you need to follow two steps, install the second private key and then configure your PC to use that second key to log to the specified server. Just copy the private key to .ssh/ in your home directory.
www.garron.me/en/linux/add-second-privat…
What does it mean to have a public key for SSH?
What does it mean to have a public key for SSH?
SSH public-key authentication uses asymmetric cryptographic algorithms to generate two key files – one "private" and the other "public". The private key files are the equivalent of a password, and should stay protected under all circumstances. If someone acquires your private key, they can log in as you to any SSH server you have access to.
docs.microsoft.com/en-us/windows-server/…
How to fix private key in.ssh folder?
How to fix private key in.ssh folder?
Make sure that user's home directory is set to what you expect it to be and that it contains the correct .ssh folder that you've been modifying. If not, use usermod -d /home/$USER $USER to fix the issue Then make sure client has the public key and private key files in the local user's .ssh folder and login: ssh user@host.com
superuser.com/questions/215504/permissio…
What do you need to know about SSH key pairs?
What do you need to know about SSH key pairs?
About key pairs. Key pairs refer to the public and private key files that are used by certain authentication protocols. SSH public-key authentication uses asymmetric cryptographic algorithms to generate two key files – one "private" and the other "public". The private key files are the equivalent of a password, and should stay protected under ...
docs.microsoft.com/en-us/windows-server/…
https://stackoverflow.com/questions/3466626
Instead of constantly starting up ssh-agent and ssh-add, it is possible to use keychain to manage your ssh keys. To install keychain, you can just click here, or use Synaptic to do the job or apt-get from the command …
https://www.ssh.com/academy/ssh/add
Adding Default Keys
Adding An Arbitrary Key
Keys with Passphrases
ssh-add Command Line Options
In the simplest form, ssh-add can be run without arguments. Used this way, it adds the default keys ~/.ssh/id_rsa, ~/.ssh/id_dsa, ~/.ssh/id_ecdsa. ~/ssh/id_ed25519, and ~/.ssh/identity, if they exist.
https://www.garron.me/en/linux/add-second-private-key-to-ssh.html
06.07.2020 · Configure the client. In the client side, in the PC from where you want to log to the server, you need to follow two steps, install the second private key and then configure your PC to use that second key to log to the specified server. Copy the private key. Just copy the private key to .ssh…
https://askubuntu.com/questions/15378
28.11.2010 · I am not sure if your private key will work in ubuntu, but its worth a shot. just copy the keys to /home/yourName/.ssh/ name the private key as id_rsa, and the public key as id_rsa.pub.. If that is not working, then you can create you own ssh key-pair using ssh-keygen and copy the new public key to the server, and ssh as follows. ssh -i ~/.ssh…
By coincidence, I just had to do this. You do need to convert the keys to OpenSSH format. The command for doing that is: ssh-keygen -i -f puttygen...
Andrew Stacey explained how to convert the keys to OpenSSH format on Linux. If you want to do the same on Windows, follow these steps: Start PuTT...
I am not sure if your private key will work in ubuntu, but its worth a shot. just copy the keys to /home/yourName/.ssh/ name the private key as id_...
How to re-use your Putty key pairs in Ubuntu as OpenSSH keys: apt-get install putty-tools #Install Putty tools in Linux cd /my-putty-keys puttygen...
PuTTY/PuTTYgen uses its own proprietary format of key pair. It won't work on Linux, where OpenSSH format of keys prevails. In PuTTYgen, you can di...
I found one more clear solution. On puttygen create a key, then navigate to Top menu - Conversion and click export openssh key. File content will...
** Be careful and make sure you have console access to the box because if you don't do it right, you won't be able to ssh in again until you fix it...
The easiest way to install OpenSSH private keys is by creating or editing ~/.ssh/config, as answered below. You need to export your PuTTY private k...
I am not sure if this thread is still active, but I stumbled upon a similar problem with Windows 10 anniversary edition which now support Ubuntu ke...
https://blog.anurut.com/ssh-with-private-key-in-windows-terminal
27.11.2020 · Till now if you wanted to ssh into a remote computer you'd have to: Open Windows Powershell or Command Prompt. Type in ssh [email protected] Enter user password; Everytime you want to start a new ssh session. Not anymore. Step 1: Create a public/private rsa key …
How to add ssh private key to ssh agent in git
putty ssh private public key windows and linux with puttygen
SFTP - How to Import an OpenSSH Private Key into WinSCP
Python SSH Key based Authentication Tutorial: Paramiko : Ubuntu SSH using Private Key
Configure SSH Server for Private Key Authentication in Ubuntu - 2/5
https://docs.microsoft.com/en-us/windows-server/administration/openssh/openssh_key...
About Key Pairs
Host Key Generation
User Key Generation
Deploying The Public Key
To use key-based authentication, you first need to generate some public/private key pairs for your client.From PowerShell or cmd, use ssh-keygen to generate some key files. This should display something like the following (where "username" is replaced by your user name) You can hit Enter to accept the default, or specify a path where you'd like your keys to be generated.At this point, you'll be prompted to use a pa…
https://docs.github.com/.../generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent
Add your SSH private key to the ssh-agent. If you created your key with a different name, or if you are adding an existing key that has a different name, replace id_ed25519 in the command with the name of your private key file. $ ssh-add ~/.ssh/id_ed25519 Add the SSH key …
https://unix.stackexchange.com/questions/23291
You need your SSH public key and you will need your ssh private key. Keys can be generated with ssh-keygen. The private key must be kept on Server 1 and the public key must be stored on Server 2. This is …
https://superuser.com/questions/215504
Permissions shouldn't have anything to do with this. Your private key is encrypted with the password, so you need to enter it for the private key to be decrypted and usable. You might consider running an ssh agent, …
https://www.maketecheasier.com/generate-ssh-public-private-keys-windows
23.09.2019 · notepad % userprofile % \.ssh\id_rsa.pub Most of the computer cloud (VPS) providers today give you an easy way to add your public key (s) through their web interface control panels. Once you start a server …
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I have a private key protected with a password to access a server via SSH.
I have 2 linux (ubuntu 10.04) machines and the behavior of ssh-add command is different in both of them.
In one machine, once I use "ssh-add .ssh/identity" and entered my password, the key was added permanently, i.e., every time I shutdown the computer and login again, the key is already added.
In the other one, I have to add the key every time I login.
As far as I remember, I did the same thing on both. The only difference is that the key was created on the one that is added permanently.
Does anyone know how to add it permanently to the other machine as well?
duduklein
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Randomize
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the agent should be temporary only; but it is possible you have the ssh-add command somewhere in ~/.bashrc or so on one of the both machines – mirek Oct 25 '18 at 11:24
A solution would be to force the key files to be kept permanently, by adding them in your ~/.ssh/config file:
If you do not have a 'config' file in the ~/.ssh directory, then you should create one. It does not need root rights, so simply:
...and enter the lines above as per your requirements.
For this to work the file needs to have chmod 600. You can use the command chmod 600 ~/.ssh/config.
If you want all users on the computer to use the key put these lines into /etc/ssh/ssh_config and the key in a folder accessible to all.
Additionally if you want to set the key specific to one host, you can do the following in your ~/.ssh/config :
This has the advantage when you have many identities that a server doesn't reject you because you tried the wrong identities first. Only the specific identity will be tried.
daminetreg
daminetreg 8,184●11 gold badge●2020 silver badges●1515 bronze badges
Permissions on the config file should be 600. chmod 600 config – generalopinion May 1 '14 at 5:39
I have to put in my password for every push, fetch, or clone with this, how do I avoid that? – Asaf Jul 10 '14 at 9:33
Use instead ssh-add ~/.ssh/gitHubKey, it will remember your key passphrase. The solution I proposed was to set it permanently across reboots. – daminetreg Jul 10 '14 at 14:35
This answer is so good that ssh-add shouldn't exist. Who wants to have a command that "temporarily" fixes a problem and breaks unexpectedly when you can just edit a config file permanently. – RussellStewart Aug 18 '14 at 18:55
This solution is not using the ssh-agent. - Is there a difference? Yeah, you can't forward they identity via agent-forwarding. – Robert Siemer Nov 6 '14 at 19:08
This didn't answer the same issue for me under Mac OS X Lion. I ended up adding:
To my .zshrc (but .profile would be fine too), which seems to have fixed it.
Aaron
Aaron 3,580●22 gold badges●2525 silver badges●2323 bronze badges
This is I think better than the solution I proposed, because ssh-add uses an authentication agent which can remember the passphrase of a protected private key, so that you don't need to type it each time you try to authenticate. Another advantage of the solution you propose is that if you have alot of key, the ssh client won't propose keys irrelevant for the server you try to connect to, indeed it will provide only the keys which are for this server, and won't lead to the server refusing the connection because of MaxAuthTries being reached, while trying all the keys listed in ssh/config. – daminetreg Aug 23 '12 at 23:04
Thanks @daminetreg. My particular problem was needing to access gitosis on a development machine without transferring my private key to it. This solution (along with adding ForwardAgent yes to my .ssh/config) solved that issue fantastically. As it turns out, it could just be ssh-add &>/dev/null as the default behavior of ssh-add appears to be to add the keys it finds in your .ssh folder. – Aaron Aug 24 '12 at 13:43
@TNick -K adds keys to OS X's keychain, which OS X GUIs use to authenticate to foreign servers. The poster in that Q is connecting through an SSH Tunnel, but is still just connecting to a remote server. A-[SSH Tunnel]->B The case I'm in is I am on a remote server but want authentication to be against credentials on my home system. A <-[Auth]-B-[Connect]->C So -K doesn't actually help, but is a great solution for the other Q. – Aaron Jun 12 '14 at 16:04
I solved that problem on Mac OSX (10.10) by using -K option for ssh-add:
For macOS 10.12 and later you need to additionally edit your ssh config as described here: https://github.com/jirsbek/SSH-keys-in-macOS-Sierra-keychain
totas
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this is a better answer for people who want to set it permanently – punkrockpolly Feb 24 '16 at 19:14
Hence this bit: "on Mac OSX (10.10)"... – Andrew K. Nov 11 '16 at 13:22
This didn't work for me (on OSX 10.12.4) – abc123 Apr 11 '17 at 17:01
According to man ssh-add on macOS High Sierra, ssh-add -K will save the passphrase into the keychain, and after rebooting, just use ssh-add -A, which does not need you to input your passphrase. – DawnSong Jun 7 '18 at 8:00
OP specifically asked for help on ubuntu, which is getting buried by this post.stackoverflow.com/a/37256434/5109177 Would it be pedantic to ask this get moved to a mac specific thread? [do those cost extra? :*)] – Vincent Buscarello Oct 24 '18 at 17:04
Just add the keychain, as referenced in Ubuntu Quick Tips https://help.ubuntu.com/community/QuickTips
Instead of constantly starting up ssh-agent and ssh-add, it is possible to use keychain to manage your ssh keys. To install keychain, you can just click here, or use Synaptic to do the job or apt-get from the command line.
Another way to install the file is to open the terminal (Application->Accessories->Terminal) and type:
You then should add the following lines to your ${HOME}/.bashrc or /etc/bash.bashrc:
Christian Saiki
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What exactly does the second command do, out of curiosity? this just opens the permissions to the current user? – Vincent Buscarello Oct 24 '18 at 17:03
This . is an alias for source – Brad Solomon Jan 24 '19 at 23:08
Is the steps enough? Why the file ~/.keychain/uname -n-sh exists ? – Victor Choy Jun 5 at 7:16
I tried @Aaron's solution and it didn't quite work for me, because it would re-add my keys every time I opened a new tab in my terminal. So I modified it a bit(note that most of my keys are also password-protected so I can't just send the output to /dev/null):
What this does is that it checks the output of ssh-add -l(which lists all keys that have been added) for a specific key and if it doesn't find it, then it adds it with ssh-add.
Now the first time I open my terminal I'm asked for the passwords for my private keys and I'm not asked again until I reboot(or logout - I haven't checked) my computer.
Since I have a bunch of keys I store the output of ssh-add -l in a variable to improve performance(at least I guess it improves performance :) )
PS: I'm on linux and this code went to my ~/.bashrc file - if you are on Mac OS X, then I assume you should add it to .zshrc or .profile
EDIT: As pointed out by @Aaron in the comments, the .zshrc file is used from the zsh shell - so if you're not using that(if you're not sure, then most likely, you're using bash instead), this code should go to your .bashrc file.
Nikola Ivanov Nikolov
Nikola Ivanov Nikolov 4,792●11 gold badge●2424 silver badges●2727 bronze badges
.zshrc is for the zsh shell, which I use instead of bash. If you're using bash on Mac OS X (the default), it would be .bashrc there as well. – Aaron May 28 '14 at 19:28
After ssh-add -l return code echo $? can be used to decide whether to add key or not. Im my linux machine with bash, the ssh-add -l won't output the key filename. Return code always works. – Bharat G Nov 17 '15 at 3:00
Permissions on the config file should be 600. chmod 600 config
As mentioned in the comments above by generalopinion
No need to touch the config file contents.
erezmta
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Was not enough for me on Linux Mint 17.1. – Benares May 9 '18 at 11:32
I don't think 600 makes sense. man ssh tells us that the ~/.ssh/config file read/write for the user, and not writable by others. – DawnSong Jun 7 '18 at 7:37
600 is read and write only for the user – Enthusiasmus Mar 16 '19 at 14:38
I had the same issue on Ubuntu 16.04: some keys were added permanently, for others I had to execute ssh-add on every session. I found out that the keys which were added permanently had both private and public key located in ~/.ssh and the keys which were forgotten on every session had only private keys in ~/.ssh dir. So solution is simple: you should copy both private and public key to ~/.ssh before executing ssh-add.
P.S.: As far as I understand from Gnome wiki my method works thanks to gnome-keyring tool which is part of the Gnome Desktop Environment. Therefore my method should probably work only if you use Gnome or Gnome-based DE.
NShiny
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Underrated answer. This solved my problem without needing additional scripts or packages after searching for two hours. – etagenklo Jan 16 '19 at 9:38
Flarkin fabulous! Great detective work. I don't think I would have figured this out. – nicorellius Sep 20 '19 at 20:10
For me this was the solution too! You do not need any other software or installations or configuration. Just put both keys in. – Andreas Dec 28 '20 at 15:40
I run Ubuntu using two id_rsa key's. (one personal one for work). ssh-add would remember one key (personal one) and forget the company one every time.
Checking out the difference between the two I saw my personal key had 400 rights while the company one had 600 rights. (had u+w). Removing the user write right from the company key (u-w or set to 400) fixed my problem. ssh-add now remembers both keys.
Fholst
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Adding the following lines in "~/.bashrc" solved the issue for me. I'm using Ubuntu 14.04 desktop.
reynoldpj
reynoldpj 69●66 bronze badges
On Ubuntu 14.04 (maybe earlier, maybe still) you don't even need the console:
Robert Siemer
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Jaseem Abbas
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LawrenceLi
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Ubuntu Doesn't have yum silly ;) – Adam F Jul 28 '16 at 22:47
For those that use Fish shell you can use the following function then call it in ~/.config/fish/config.fish or in a separate configuration file in ~/.config/fish/conf.d/loadsshkeys.fish. It will load all keys that start with id_rsa into the ssh-agent.
If you want to have the ssh-agent auto started when you open a terminal you can use danhper/fish-ssh-
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