[yocto] Setting root password

[Andy Pont]

Hello,

Looking around the web and reading the assorted documents it seems to be
that the defined way to set the root password is to remove "debug-tweaks"
from EXTRA_IMAGE_FEATURES and to add the following lines to local.conf:

require conf/distro/include/security_flags.inc
INHERIT += "extrausers"
EXTRA_USERS_PARAMS = "usermod -P <encrypted_password> root;"

When I try to build core-image-minimal then the build fails with the
following:

| DEBUG: Executing shell function set_user_group
| NOTE: Performing usermod with [-R
XXXXX/build/tmp/work/intel_core2_32-poky-linux/core-image-minimal-initramfs/
1.0-r0/rootfs -P Hkw6rBJlcfhvM root] and 1 times of retry
| Server refused shutdown.  Remaining client fds: 2
| Client pids: 3878 16245
| Server will shut down after all clients exit.
| WARNING: usermod command did not succeed. Retrying...
| ERROR: Tried running usermod command 1 times without success, giving up
| WARNING:
XXXXX/build/tmp/work/intel_core2_32-poky-linux/core-image-minimal-initramfs/
1.0-r0/temp/run.set_user_group.3878:1 exit 1 from
|   exit 1
| DEBUG: Python function do_rootfs finished
| ERROR: Function failed: set_user_group (log file is located at
XXXXX/build/tmp/work/intel_core2_32-poky-linux/core-image-minimal-initramfs/
1.0-r0/temp/log.do_rootfs.3878)

Any ideas on how to make this work?

Thanks,

Andy.