docker-machine boot2docker root password

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Haven't found an answer anywhere... I created a VM (boot2docker) using docker-machine. I need to edit some files using root.

What is the root password in boot2docker?

Kingship answered 18/9, 2015 at 8:9 Comment(6)

have you tried this: tcuser ? – Decennary 18/9, 2015 at 8:35

yes, but wrong password – Kingship 18/9, 2015 at 9:0

Answered here: #24286507 – Hollyanne 16/3, 2016 at 16:8

user: docker and pwd: tcuser then sudo – Advertisement 19/8, 2016 at 9:7

@Advertisement that works, but where does that information come from? – Illusion 9/1, 2019 at 23:14

Nevermind, the reference is boot2docker README, as said in here – Illusion 9/1, 2019 at 23:15

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If you only have a single docker machine, you simply do:

$ docker-machine ssh

If you have multiple machines, you need to find your "machine name" first:

$ docker-machine ls
NAME      ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER    ERRORS
default   *        virtualbox   Running   tcp://192.168.99.101:2376           v1.10.2

From the above, you can see that default is the name of your machine and you can ssh as follows:

$ docker-machine ssh default

When you're in, it's a simple case of sudo-ing to root

docker@default:~$ sudo -i
Boot2Docker version 1.10.2, build master : 611be10 - Mon Feb 22 22:47:06 UTC 2016
Docker version 1.10.2, build c3959b1
root@default:~#

Edited: Also, as @MediaVince mentioned you can use the following credentials:

user: docker

pwd: tcuser

Outbid answered 8/3, 2016 at 11:4 Comment(3)

why does -i work ? I know it means "simulate initial login", but what is the exact mechanism ? – Disney 23/1, 2017 at 19:12

This doesn't actually answer the user's question. The answer was in his question's comment. – Eastward 26/1, 2017 at 6:12

Sorry for the late reply. The -i executes a login shell, similar to the user login in. The manual includes a more complete explanation: Run the shell specified by the target user's password database entry as a login shell. This means that login-specific resource files such as .profile or .login will be read by the shell. If a command is specified, it is passed to the shell for execution via the shell's -c option. If no command is specified, an interactive shell is executed. – Outbid 20/5, 2018 at 18:50

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just type

$ docker-machine ssh your_environment

and then to be root

$ sudo -i

hope it helps

Hike answered 23/9, 2015 at 9:43 Comment(1)

why does -i work ? I know it means "simulate initial login", but what is the exact mechanism ? – Disney 23/1, 2017 at 19:12

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Login via ssh as docker user:

$ ssh docker@<docker-machine-ip>

Password: tcuser

Then you can change on root user, just run sudo su root

Gasket answered 15/11, 2017 at 12:8 Comment(1)

This is also documented at github.com/boot2docker/boot2docker/blob/master/README.md – J 29/9, 2018 at 19:23

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Ok the key was not to do "su root" but rather "su sudo". It then doesn't ask for root password.

Kingship answered 18/9, 2015 at 9:8 Comment(1)

For me it was rather sudo su. su sudo gives su: unknown user sudo – Octarchy 1/2, 2018 at 13:21

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