![]() ![]() Another process could attach to your pipe/fd before the password is written. It is quite cumbersome in bash, arguably easier with programming languages. In all three options, the password is visible or stored in plaintext at some point: Anonymous pipe (recommended by sshpass) # Create a pipe Please pay particular attention to the SECURITY CONSIDERATIONS section of the man page. In situations where password is the only authentication method available, sshpass can be used to automatically enter the password. Other methods such as gssapi/kerberos exist but are more complex. You could easily add your test VM key to an existing auth agent (see example below). SSH single sign-on is usually achieved with public key authentication and an authentication agent. What is much safer is to actually enter a passphrase when generating keys and then use Keychain (MacOS, Linux) or SSH agent to remember the passphrase until you signout or suspend or timeout, depending on what you prefer. Then copy the keypair onto the server with one simple command: # ssh-copy-id can now log in without a password: # ssh Leaving SSH keys exposed without encrypting them is a not good practice even if you encrypt your whole drive. When the terminal asks you to enter a passphrase, just leave this blank (Warning: read below) too and press Enter. When the message 'Enter file in which to save the key' appears, just leave the filename blank by pressing Enter. your machineĮnter the following command to start generating a rsa keypair: # ssh-keygen You are just three easy steps away from the solution:Īll the following commands are being run on the client side, i.e. While the correct answer for your question is sshpass ( see other answer for details), there is a more secure way - SSH keys. To make sure we haven’t added extra keys that you weren’t expecting.įinally, check to log in… $ ssh may also want to look into using ssh-agent if you want to try keeping your keys protected with a passphrase. ssh dir and authorized_keys file, you need to create it first Now try logging into the machine, with ssh and check-in. Your public key has been saved in /home/username/.ssh/id_rsa.pub.Ĭopy your keys to the target server: $ ssh-copy-id password: Your identification has been saved in /home/username/.ssh/id_rsa. Just hit Enter for the key and both passphrases: $ ssh-keygen -t rsa -b 2048Įnter file in which to save the key (/home/username/.ssh/id_rsa):Įnter passphrase (empty for no passphrase): If you already have an SSH key, you can skip this step… Generate a passphrase-less SSH key and push it to your VM.
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