'Yocto is giving root a password

I am using Yocto to create a linux image for an iMX6. I am using Yet Another Terminal (YAT) and Command Line to interface with the device image. I added

inherit extrausers
ROOTPASSWORD = "root"
ROOTUSERNAME = "root"
EXTRA_USERS_PARAMS = "usermod -P ${ROOTPASSWORD} ${ROOTUSERNAME};"

To core-image-full-cmdline.bb

Using YAT this password takes hold. However using the terminal I can not SSH into my device. Using

ssh [email protected]

This should log in automatically as Yocto does not set a default password. When I enter root as the password I am not logged in.

linuxsshyocto


Solution 1:[1]

By default Yocto configures SSH servers to prevent root logins. I'll skip the reasons why that's a good idea, but you have a few options.

  1. Create a non-root user, SSH with that then su using your root password.
EXTRA_USERS_PARAMS = " \
    useradd -P ssh_password ssh_user; \
    usermod -P root_password root; \
"
  1. Configure your SSH server to allow root logins.
    • Dropbear: add a bbappend to modify dropbear.default removing -w from the args
    • OpenSSH: add a bbappend to modify sshd_config adding PermitRootLogin prohibit-password to allow certificate logins or PermitRootLogin yes to allow password logins.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Eric Haskins

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