How To Add Rsa Host Key For Mac
On OSX, the native ssh-add client has a special argument to save the private key's passphrase in the OSX keychain, which means that your normal login will unlock it for use with ssh. On OSX Sierra and later, you also need to configure SSH to always use the keychain (see Step 2 below). Alternatively you can use a key without a passphrase, but if you prefer the security that's certainly acceptable with this workflow.
Step 1 - Store the key in the keychain Just do this once: ssh-add -K ~/.ssh/[your-private-key] Enter your key passphrase, and you won't be asked for it again. (If you're on a pre-Sierra version of OSX, you're done, Step 2 is not required.) Step 2 - Configure SSH to always use the keychain It seems that OSX Sierra removed the convenient behavior of persisting your keys between logins, and the update to ssh no longer uses the keychain by default. Because of this, you will get prompted to enter the passphrase for a key after you upgrade, and again after each restart. The solution is fairly simple, and is outlined in. Here's how you set it up: • Ensure you've completed Step 1 above to store the key in the keychain.
After that you will have to upload public key in cPanel, under SSH/Shell access and load the private key in your Terminal using the ssh-add command: 1 ssh - add / home / user /. Ssh / id_rsa. A new RSA key will be generated for you automatically. All this really did was delete a file named known_hosts inside the hidden /Users/YOUR_USERNAME/.ssh directory. Since it deleted the file, this also means that RSA keys for other SSH connections will be lost as well. When creating your key pair, you choose what to name it. For example, the default name is 'id_rsa', but you can name it anything you like while creating it. Posted by: Vivek Gite The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting.
Warning: The Rsa Host Key For
• If you haven't already, create an ~/.ssh/config file. In other words, in the.ssh directory in your home dir, make a file called config. • In that.ssh/config file, add the following lines: Host * UseKeychain yes AddKeysToAgent yes IdentityFile ~/.ssh/id_rsa Change ~/.ssh/id_rsa to the actual filename of your private key. If you have other private keys in your ~.ssh directory, also add an IdentityFile line for each of them. For example, I have one additional line that reads IdentityFile ~/.ssh/id_ed25519 for a 2nd private key. The UseKeychain yes is the key part, which tells SSH to look in your OSX keychain for the key passphrase.
Next time you load any ssh connection, it will try the private keys you've specified, and it will look for their passphrase in the OSX keychain. No passphrase typing required.
You are being prompted for the password every time because your 'login' keychain is being locked after inactivity and/or sleeping or in your case a reboot. There are two ways to solve this for you. • Change the settings for your 'login' keychain.
Assuming your ssh key is stored in the 'login' keychain. • Open Keychain Access • Highlight the 'login' keychain • Right-click or option-click the 'login' keychain • Uncheck the 'Lock after X minutes of inactivity' and the 'Lock when sleeping' checkboxes. • Generate another SSH key without using a passphrase. • Open Terminal. • Enter command: ssh-keygen -t rsa -b 4096 -C -f • -t is for type, -b is key size, -C is comment, -f output file (must create directories first) • Do not set a passphrase.
• Import SSH key into 'login' keychain with ssh-add -K You should not be prompted for a keychain password anymore. I had a similar problem, in that I was being asked EVERY TIME for my pub-key passphrase. Per suggestion of user 'trisweb' above, I turned on these options to ~/.ssh/config: Host * UseKeychain yes AddKeysToAgent yes IdentityFile ~/.ssh/id_rsa BUT it still prompted every time I wanted to use ssh.
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Eventually I turned on 'ssh -v' and found this debug line: debug1: key_load_private: incorrect passphrase supplied to decrypt private key I then opened my keychain in 'Keychain Access.app', found the key named 'SSH: /Users/username/.ssh/id_rsa' and opened it up. I clicked 'Show password' to disclose the password and indeed found that the passphrase in the keyring was an old passphrase.
I updated the passphrase in Keychain Access, and now password-free works. I could have also updated the passphrase with this phrase: ssh-keygen -p -f ~/.ssh/id_rsa. To all where the above did not work, my issue appears to have been because I was duplicating the UseKeychain yes & AddKeysToAgent yes in all ssh key profiles / shortcuts.
I updated my ~/.ssh/config file to declare these only once and they now all load on login without prompting for passwords on startup, e.g: Host * UseKeychain yes AddKeysToAgent yes IdentityFile ~/.ssh/foo IdentityFile ~/.ssh/bar Host foo HostName foo.com User fooUser IdentityFile ~/.ssh/foo Host bar HostName bar.com User barUser IdentityFile ~/.ssh/bar. 