Is there a way to pass a password to ssh automatically. I would like to automatically ssh to a server without using public key authentication or expect scripts, by somehow getting ssh to read the password from stdin or a file.
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Rather than passing your password use a public/private key system. Add the public key for a machine to the authorized keys list on all the machines you want to connect to. Using this method SSH can validate the keys automatically and no password is required.
The proper way would be to put the SSHFP (automatically) into the DNS, sign the zone via DNSSEC and let SSH handle the rest, especially, if you need to do this very often and the keys are changing constantly.
It seems that when I was a good web citizen and made all my pages nice and standards compliant via liberal use of DOCTYPE I apparently instructed IE to please ignore my CSS settings (come again?! HTML 4.01 Transitional *should* understand the margin: auto construction). I can fix it when I get home by changing the DOCTYPE into something else, unfortunately, the bloody page validators will complain unless I both fix the DOCTYPE into say XHTML 1.something *and* self-close all my meta and image tags.
This will cause the check to be skipped and the remote host's key to automatically be added on first login. (There's also the option CheckHostIP, but it doesn't seem to actually disable the check for whether a key exists at all).
One of the automated tests involves invoking the RPMSIGN(8) program which in turn invokes GPG(1) to attach a digital signature to some RPM files I am creating. Of course, GPG uses pinentry (PIN entry) to prompt the human to enter the passphrase for the RPM signing key (an RSA key pair). I want to take the human out of the loop and fully automate the task of supplying the passphrase for the RPM signing key.( And yes, I know about the security implications. This is simply an automated test environment and not a production host, so I'm not overly concerned about security. In the production version the user will manually enter the RPM signing key's password.)
When I run RPMSIGN in a GUI console window on this F25 host, GPG uses pinentry to pop up a GUI dialog box that asks the user (me) to enter the passphrase for the RPM signing key. This pinentry behavior, of course, interferes and prevents automated entry of the passphrase.
One solution to this sort of problem is to use gpg-agent, which manages GPG secret keys. You can use that tool in conjunction with gpg-preset-passphrase to seed the passphrase into the gpg-agent cache. Read more about gpg-agent here. This will allow you to avoid needing to enter a passphrase manually so you can perform your automated tasks.
To automate it pass your PIN/Pass via a gpg command line (this may expose it via proc params while gpg is running) or via a temp file a to the gpg extra args, and then shred the file. Either way the risk of exposure is mostly for advanced threat models.
What iApp are you using? I took a good one here on past (f5.automated_backup.v2.0.tmpl from Thomas Schockaert) and I did some changes on it during these years. One of then was to add "-c cipher" parameter on SCP on implementation section.
It is MOST SECURE to select Yes, which is the SCP/SSH default setting and which will not allow connections to unknown servers. A server is considered 'unknown' until an SSH key fingerprint has been verified, or if the destination SSL certificate changes and the fingerprint no longer matches.Selecting 'No (INSECURE)' will ignore certificate verification for connections this iApp makes to the server configured above.TROUBLESHOOTING: If the SCP script fails with a 'Host key verification failed' or 'No RSA host key is known for' error (which can viewed in /var/tmp/scriptd.out after deploying this iApp), review the IMPORTANT steps (under Destination IP) above regarding the known_hosts file to resolve the issue. Also, review additional troubleshooting notes.TROUBLESHOOTING: If the SCP script fails with a 'WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!' error (which can viewed in /var/tmp/scriptd.out after deploying this iApp), the certificate on the destination server has changed. This could mean 1) The certificate was updated legitimately, or 2) There is an IP conflict and the script is connecting to the wrong server, or 3) the destination server was replaced or rebuilt and has a new certificate, or 4) a bad actor is intercepting the connection (man-in-the-middle) and the script is rightly warning you to not connect. Investigate the destination server before proceeding.Username:Copy/Paste the SSH private key to be used for passwordless authentication:Private key must be non-encrypted and in 'OpenSSH' base64 format. As an example run 'ssh-keygen -t rsa -b 4096 -C f5_backups' from the BIG-IP CLI, step through the questions, and view the resulting private key (by default ssh-keygen will save the key to /.ssh/id_rsa).If the Destination Server supports it, you may optionally run 'ssh-copy-id -i /root/.ssh/id_rsa.pub -o Ciphers=aes128-ctr username@destination' (with relevant values) to add the public key to the Destination Server's authorized_keys file (this only needs to be done once per unique key--not from every BIG-IP).Passwords and private keys are stored in an encrypted format. The salt for the encryption algorithm is the F5 cluster's Master Key. The master key is not shared when exporting a qkview or UCS, thus rendering your passwords and private keys safe if a backup file were to be stored off-box.Cipher
GitHub user and community member Daehahn is working on a PowerShell Script to automate this process. The comment thread starts here and the gist for the PowerShell script for wsl2-network.ps1 is here. It resets firewall and portproxies, finds your default distro's new IP, and sets you up again. Save this .ps1 somewhere, read it, and run "unblock-file wsl2-network.ps1" on it so you can set up your system quickly for Shushing into your WSL2 instance!
This build contains a fix for the crash at start many of you reported in beta 4. So again, if you are still seeing it, let us know by filing or re-filing a bug. Windows users should include their email in the crash report so we can find your specific crash. Mac users should send the Apple crash log with their report. We are actively working on restoring auto crash reporting on Linux.
I have seen many answers to this questions. I too faced the problem. My case was my ssh connection were working before then, I changed to windows 10 auto upgraded. Did not work on Ubuntu on my desktop for long. 2ff7e9595c
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