How to set root password on Yocto / Poky image?

Question

I am building an image with Yocto/Poky release Daisy 1.6.3.
What is the correct way or config file where to set the root password? The default password is empty and I can't find a place where to specify it.

Anyone care to explain the downvotes 2 years after the question was asked? — Alessandro Da Rugna, Dec 18 '17 at 10:23

john madieu · Accepted Answer · 2015-09-03T15:19:53.020

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Here is what you have to do in your recipe.

inherit extrausers
EXTRA_USERS_PARAMS = "usermod -P p@ssw0rd root;"

where p@ssw0rd is the password you want root user to have.

This link may help you.

As "debug-tweaks"'s goal is to set root's password empty, you must remove it from your EXTRA_IMAGE_FEATURES.

edited Sep 03 '15 at 15:19

answered Aug 28 '15 at 18:36

john madieu

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I realize this is a few years old, but it's important to point out that this class and variable are intended at the _image level_ recipe, not a package, etc. ([rocko](https://www.yoctoproject.org/docs/2.4.3/ref-manual/ref-manual.html#ref-classes-extrausers)) – Thomas Aug 10 '18 at 18:26

score 5 · Answer 2 · edited Mar 06 '17 at 06:12

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As of Poky 2.1.2; to set the root password the following instructions need to be added to local.conf:

INHERIT += "extrausers"
EXTRA_USERS_PARAMS = "usermod -P p@ssw0rd root;"

No need to remove debug-tweaks

edited Mar 06 '17 at 06:12

john madieu

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answered Mar 01 '17 at 15:26

Hector D Martínez

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score 4 · Answer 3 · answered Feb 14 '22 at 13:42

In your image recipe:

Set a plain password:

inherit extrausers  
EXTRA_USERS_PARAMS = "usermod -P MyPass root;"

Or set a hashed password (notice that insert \ before dollar signs):

inherit extrausers  
EXTRA_USERS_PARAMS = "usermod -p '\$6\$3trMG9KVzGF3942L\$pHeO/r4/RIEFU1tZzoPXYlJLHNvmeJFZdIwQCcTrZFq5kpIgTxoEOJBO5iYEvLzeMjhZRtXhTPbOD4RFAelwk0' root;"

Note: for hashing your plain password, use can use openssl:

$ openssl passwd -6
Password:
Verifying - Password:
$6$3trMG9KVzGF3942L$pHeO/r4/RIEFU1tZzoPXYlJLHNvmeJFZdIwQCcTrZFq5kpIgTxoEOJBO5iYEvLzeMjhZRtXhTPbOD4RFAelwk0

Alex · Answer 4 · 2023-02-07T01:24:35.453

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As of Poky 4.0.7, none of the answers here work because the -P clear text password flag is no longer supported as per this commit. You will get an error message like usermod: prefix must be an absolute path. Now, only the -p encrypted password flag is supported. To set your root password to password add below to your conf/local.conf file:

INHERIT += "extrausers"
EXTRA_USERS_PARAMS = "usermod -p '\$1\$EZkCDWad\$eEMhB36cFCOeRGXvtP3t81' root;"

you can generate your own password string with openssl passwd -1 but note that $ needs to be escaped with \ as shown in the example.

edited Feb 07 '23 at 01:24

answered Feb 07 '23 at 00:50

Alex

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I'm using SHA512 to hash the password but not working. my question is here https://unix.stackexchange.com/questions/754866/yocto-linux-root-logging-error-libcrypt-does-not-support-md5-or-sha512 any help – bouqbouq Aug 25 '23 at 12:47

score 2 · Answer 5 · answered Dec 17 '17 at 04:19

Here is method I used which does not use the -P switch on the usermod command. You must use the following form:

EXTRA_USERS_PARAMS = "usermod -p $(openssl passwd p@ssw0rd) root;"

The usermod -P command does not work in my version of linux.

See How do i change the root password in the Yocto dora bitbake system?

score 1 · Answer 6 · answered Dec 18 '17 at 07:00

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Add the below linw at your conf/local.conf file

INHERIT += "extrausers"
EXTRA_USERS_PARAMS = "usermod -P urpassword root;"

answered Dec 18 '17 at 07:00

yoctotutor.com

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How to set root password on Yocto / Poky image?

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