FAQ:How do I set or change the root password - Revision history

Quentin Schulz: Point to (maintained) documentation. ($ needs to be escaped and it was not explained here but in the docs)

2022-02-18T17:10:39Z

Point to (maintained) documentation. ($ needs to be escaped and it was not explained here but in the docs)

← Older revision		Revision as of 17:10, 18 February 2022
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	~~'''Q:''' How do I set / change the root password?~~		The content of this document has been moved to: https://docs.yoctoproject.org/ref-manual/classes.html#extrausers-bbclass

	~~'''A:''' Use the extrausers class to set the password. In your image recipe:~~

	~~inherit extrausers~~
	~~EXTRA_USERS_PARAMS = "usermod -p '\$5\$sIhB3FmJb4oSx.uN\$WWE8AJP8ybR03TXBJ2JMZJ6LpsrvcwKmsHxxY.asDR6' root;"~~

	~~This sets the root password to a hashed value~~ of ~~"1876*18". If you prefer to do~~ this ~~in local.conf or your distro configuration, you'll need to change the first line~~ to ~~<code>INHERIT += "extrausers"</code>.~~

	~~To obtain the hashed value for a password, you can use the following command~~:

	~~$ python -c 'import crypt; print(crypt.crypt("1876*18", crypt.METHOD_SHA256))'~~

	~~{\| style="color:black; background-color~~:~~#ffcccc" width="100%" cellpadding="10" class="wikitable"~~
	~~\|'''WARNING:''' if you are hardcoding a root password for a production image deployed to multiple devices, consider carefully the ramifications of doing so before proceeding.~~
	\|}

	~~Note some characters may need some level of escaping to make it correctly into <code>~~/~~etc~~/~~shadow<~~/~~code> (examples shown should work)~~

	~~'''Q:''' How do I add users?~~

	~~'''A:''' Use the extrausers class to and the user and set the password. In your image recipe:~~

	~~inherit extrausers~~
	~~EXTRA_USERS_PARAMS = "useradd~~ -~~p '\$5\$vn9du4U3jghFZaqC\$Fl6pQZK5FUoT2D6Twij3OpjGR9FXFsE1r~~/~~vyMtGooX6' myUser;"~~

	~~This adds the user myUser and sets the password to a hashed value of "2015*08"~~. ~~As above, if you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "~~extrausers~~"</code>.~~




	[[Category:FAQ]] [[Category:FAQ-open]]		[[Category:FAQ]] [[Category:FAQ-open]]

Niall Parker: Include note and example for escaping the $ characters to preserve pwd hash in generated files.

2022-02-18T17:08:51Z

Include note and example for escaping the $ characters to preserve pwd hash in generated files.

← Older revision		Revision as of 17:08, 18 February 2022
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	inherit extrausers		inherit extrausers
	EXTRA_USERS_PARAMS = "usermod -p '$5$sIhB3FmJb4oSx.uN$WWE8AJP8ybR03TXBJ2JMZJ6LpsrvcwKmsHxxY.asDR6' root;"		EXTRA_USERS_PARAMS = "usermod -p '\$5\$sIhB3FmJb4oSx.uN\$WWE8AJP8ybR03TXBJ2JMZJ6LpsrvcwKmsHxxY.asDR6' root;"

	This sets the root password to a hashed value of "1876*18". If you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.		This sets the root password to a hashed value of "1876*18". If you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.
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	\|}		\|}

			Note some characters may need some level of escaping to make it correctly into <code>/etc/shadow</code> (examples shown should work)

	'''Q:''' How do I add users?		'''Q:''' How do I add users?
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	inherit extrausers		inherit extrausers
	EXTRA_USERS_PARAMS = "useradd -p '$5$vn9du4U3jghFZaqC$Fl6pQZK5FUoT2D6Twij3OpjGR9FXFsE1r/vyMtGooX6' myUser;"		EXTRA_USERS_PARAMS = "useradd -p '\$5\$vn9du4U3jghFZaqC\$Fl6pQZK5FUoT2D6Twij3OpjGR9FXFsE1r/vyMtGooX6' myUser;"

	This adds the user myUser and sets the password to a hashed value of "2015*08". As above, if you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.		This adds the user myUser and sets the password to a hashed value of "2015*08". As above, if you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.

Peter Kjellerstedt at 21:45, 16 December 2021

2021-12-16T21:45:25Z

← Older revision		Revision as of 21:45, 16 December 2021
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	inherit extrausers		inherit extrausers
	EXTRA_USERS_PARAMS = "usermod -~~P 1876*18~~ root;"		EXTRA_USERS_PARAMS = "usermod -p '$5$sIhB3FmJb4oSx.uN$WWE8AJP8ybR03TXBJ2JMZJ6LpsrvcwKmsHxxY.asDR6' root;"

	This sets the root password to "1876*18". If you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.		This sets the root password to a hashed value of "1876*18". If you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.

			To obtain the hashed value for a password, you can use the following command:

			$ python -c 'import crypt; print(crypt.crypt("1876*18", crypt.METHOD_SHA256))'

	{\| style="color:black; background-color:#ffcccc" width="100%" cellpadding="10" class="wikitable"		{\| style="color:black; background-color:#ffcccc" width="100%" cellpadding="10" class="wikitable"
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	inherit extrausers		inherit extrausers
	EXTRA_USERS_PARAMS = "useradd -~~P 2015*08~~ myUser;"		EXTRA_USERS_PARAMS = "useradd -p '$5$vn9du4U3jghFZaqC$Fl6pQZK5FUoT2D6Twij3OpjGR9FXFsE1r/vyMtGooX6' myUser;"

	This adds the user myUser and sets the password to "2015*08". As above, if you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.		This adds the user myUser and sets the password to a hashed value of "2015*08". As above, if you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.

PaulEggleton at 02:50, 21 February 2018

2018-02-21T02:50:18Z

← Older revision		Revision as of 02:50, 21 February 2018
Line 15:		Line 15:
	'''Q:''' How do I add users?		'''Q:''' How do I add users?

	'''A:''' Use the extrausers class to and the user and set the password:		'''A:''' Use the extrausers class to and the user and set the password. In your image recipe:

	inherit extrausers		inherit extrausers

PaulEggleton: Add note about INHERIT +=.

2018-02-21T02:47:06Z

Add note about INHERIT +=.

← Older revision		Revision as of 02:47, 21 February 2018
Line 1:		Line 1:
	'''Q:''' How do I set / change the root password?		'''Q:''' How do I set / change the root password?

	'''A:''' Use the extrausers class to set the password:		'''A:''' Use the extrausers class to set the password. In your image recipe:

	inherit extrausers		inherit extrausers
	EXTRA_USERS_PARAMS = "usermod -P 1876*18 root;"		EXTRA_USERS_PARAMS = "usermod -P 1876*18 root;"

	This sets the root password to "1876*18".		This sets the root password to "1876*18". If you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.

	{\| style="color:black; background-color:#ffcccc" width="100%" cellpadding="10" class="wikitable"		{\| style="color:black; background-color:#ffcccc" width="100%" cellpadding="10" class="wikitable"
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	EXTRA_USERS_PARAMS = "useradd -P 2015*08 myUser;"		EXTRA_USERS_PARAMS = "useradd -P 2015*08 myUser;"

	This adds the user myUser and sets the password to "2015*08".		This adds the user myUser and sets the password to "2015*08". As above, if you prefer to do this in local.conf or your distro configuration, you'll need to change the first line to <code>INHERIT += "extrausers"</code>.

PaulEggleton: Add warning

2015-10-30T09:20:20Z

Add warning

← Older revision		Revision as of 09:20, 30 October 2015
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	This sets the root password to "1876*18".		This sets the root password to "1876*18".

			{\| style="color:black; background-color:#ffcccc" width="100%" cellpadding="10" class="wikitable"
			\|'''WARNING:''' if you are hardcoding a root password for a production image deployed to multiple devices, consider carefully the ramifications of doing so before proceeding.
			\|}


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	This adds the user myUser and sets the password to "2015*08".		This adds the user myUser and sets the password to "2015*08".




	[[Category:FAQ]] [[Category:FAQ-open]]		[[Category:FAQ]] [[Category:FAQ-open]]

Ckamas at 21:21, 7 August 2015

2015-08-07T21:21:29Z

← Older revision		Revision as of 21:21, 7 August 2015
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	inherit extrausers		inherit extrausers
	EXTRA_USERS_PARAMS = "~~useradd~~ -P 1876*18 root;"		EXTRA_USERS_PARAMS = "usermod -P 1876*18 root;"

	This sets the root password to "1876*18".		This sets the root password to "1876*18".




			'''Q:''' How do I add users?

			'''A:''' Use the extrausers class to and the user and set the password:

			inherit extrausers
			EXTRA_USERS_PARAMS = "useradd -P 2015*08 myUser;"

			This adds the user myUser and sets the password to "2015*08".

	[[Category:FAQ]] [[Category:FAQ-open]]		[[Category:FAQ]] [[Category:FAQ-open]]

RossBurton: use extrausers to set root password

2015-06-16T19:55:47Z

use extrausers to set root password

← Older revision		Revision as of 19:55, 16 June 2015
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	'''Q:''' How do I set / change the root password?		'''Q:''' How do I set / change the root password?

	'''A:''' In the ~~image.bb file (eg: core-image-minimal.bb), append this text~~:~~'''~~		'''A:''' Use the extrausers class to set the password:

	~~ROOTFS_POSTPROCESS_COMMAND +~~= "~~set_root_passwd;"~~		inherit extrausers
	~~set_root_passwd() {~~		EXTRA_USERS_PARAMS = "useradd -P 1876*18 root;"
	~~sed 's%^root:[^:]~~*:%root~~:wYNffsf6sozwE:%' \~~
	~~< ${IMAGE_ROOTFS}/etc/shadow \~~
	~~> ${IMAGE_ROOTFS}/etc/shadow.new~~;
	~~mv ${IMAGE_ROOTFS}/etc/shadow.new ${IMAGE_ROOTFS}/etc/shadow ;~~
	}

	This ~~will set~~ the root password as "~~root~~" ~~in the newly built image~~.		This sets the root password to "1876*18".

	~~To choose a different password, use the command:~~
	~~#passwd root~~
	~~and copy the corresponding part of "/etc/shadow" to this text:~~

	~~eg:~~
	~~# cat /etc/shadow~~
	~~root:wYNffsf6sozwE:16122:0:99999:7:::~~
	~~...~~
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Anders Darander: Create a function to change root password

2014-06-24T06:30:47Z

Create a function to change root password

← Older revision		Revision as of 06:30, 24 June 2014
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	'''A:''' In the image.bb file (eg: core-image-minimal.bb), append this text:'''		'''A:''' In the image.bb file (eg: core-image-minimal.bb), append this text:'''

			ROOTFS_POSTPROCESS_COMMAND += "set_root_passwd;"
	ROOTFS_POSTPROCESS_COMMAND += "\		set_root_passwd() {
	sed 's%^root:[^:]*:%root:wYNffsf6sozwE:%' \		sed 's%^root:[^:]*:%root:wYNffsf6sozwE:%' \
	< ${IMAGE_ROOTFS}/etc/shadow \		< ${IMAGE_ROOTFS}/etc/shadow \
	> ${IMAGE_ROOTFS}/etc/shadow.new;\		> ${IMAGE_ROOTFS}/etc/shadow.new;
	mv ${IMAGE_ROOTFS}/etc/shadow.new ${IMAGE_ROOTFS}/etc/shadow ;"		mv ${IMAGE_ROOTFS}/etc/shadow.new ${IMAGE_ROOTFS}/etc/shadow ;
			}

	This will set the root password as "root" in the newly built image.		This will set the root password as "root" in the newly built image.

Maxin B. John at 11:50, 3 March 2014

2014-03-03T11:50:31Z

← Older revision		Revision as of 11:50, 3 March 2014
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	'''Q:''' How do I set / change the root password?		'''Q:''' How do I set / change the root password?

	'''A:''' In the image.bb file (eg: core-image-minimal.bb), append this text:		'''A:''' In the image.bb file (eg: core-image-minimal.bb), append this text:'''

	ROOTFS_POSTPROCESS_COMMAND += "\
			ROOTFS_POSTPROCESS_COMMAND += "\
	sed 's%^root:[^:]*:%root:wYNffsf6sozwE:%' \		sed 's%^root:[^:]*:%root:wYNffsf6sozwE:%' \
	< ${IMAGE_ROOTFS}/etc/shadow \		< ${IMAGE_ROOTFS}/etc/shadow \
	> ${IMAGE_ROOTFS}/etc/shadow.new;\		> ${IMAGE_ROOTFS}/etc/shadow.new;\
	mv ${IMAGE_ROOTFS}/etc/shadow.new ${IMAGE_ROOTFS}/etc/shadow ;"		mv ${IMAGE_ROOTFS}/etc/shadow.new ${IMAGE_ROOTFS}/etc/shadow ;"


	This will set the root password as "root" in the newly built image.		This will set the root password as "root" in the newly built image.

	To choose a different password, use the command:		To choose a different password, use the command:
	"passwd root"		#passwd root
	and copy the corresponding part of "/etc/shadow" to this text:		and copy the corresponding part of "/etc/shadow" to this text:

	eg:		eg:
	# cat /etc/shadow		# cat /etc/shadow
	root:wYNffsf6sozwE:16122:0:99999:7:::		root:wYNffsf6sozwE:16122:0:99999:7:::
	...		...

	[[Category:FAQ]] [[Category:FAQ-open]]		[[Category:FAQ]] [[Category:FAQ-open]]