permission denied mkdir /root/.cache

[Peter Hultqvist]

Running as root:
# sudo ubuntu-emulator create u1

Creating "u1" from ubuntu-touch/devel revision 28
Downloading...
Cannot download https://system-image.ubuntu.com/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz: mkdir /root/.cache: permission denied

First I thought that it might be because /root was a symlink so I moved it away and created a new /root dir
Same error

Then I ran mkdir /root/.cache
Followed by the same "ubuntu-emulator create u1" which now reported:
...
Creating "u1" from ubuntu-touch/devel revision 28
Downloading...
Cannot download https://system-image.ubuntu.com/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz: mkdir /root/.cache/ubuntuimages: permission denied

And the same for: mkdir /root/.cache/ubuntuimages/pool

Now the error message reads:
Cannot download https://system-image.ubuntu.com/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz: open /root/.cache/ubuntuimages/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz_lock: permission denied

This is where I'm stuck right now

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-emulator 0.2+14.04.20140416.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
Date: Fri May 16 19:35:09 2014
InstallationDate: Installed on 2014-02-13 (91 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140211)
SourcePackage: goget-ubuntu-touch
UpgradeStatus: No upgrade log present (probably fresh install)

[Peter Hultqvist (hultqvist)]

After changing the permissions for .cache/ from drwxr-xr-x to drwxrwxr-x It works, owner was all the time root.root

[Peter Hultqvist (hultqvist)]

After the ubuntu-emulator create finished downloading and exited with 0 there is now a followup issue.

root ~ # ubuntu-emulator create myinstance
Creating "myinstance" from ubuntu-touch/devel revision 28
Downloading...
root ~ # echo $?
0
root ~ # ubuntu-emulator run myinstance
This instance does not exist, use 'create myinstance' to create it
root ~ # echo $?
1

the content of .cache is
./ubuntuimages
./ubuntuimages/pool
./ubuntuimages/pool/device-13e1882a8e51bac70713ca39ed3a89c83f2a80800713add1ea656da62c6d90d9.tar.xz.asc
./ubuntuimages/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz
./ubuntuimages/pool/device-13e1882a8e51bac70713ca39ed3a89c83f2a80800713add1ea656da62c6d90d9.tar.xz
./ubuntuimages/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz.asc
./ubuntuimages/ubuntu-touch
./ubuntuimages/ubuntu-touch/devel
./ubuntuimages/ubuntu-touch/devel/generic
./ubuntuimages/ubuntu-touch/devel/generic/version-28.tar.xz
./ubuntuimages/ubuntu-touch/devel/generic/version-28.tar.xz.asc

[Sergio Schvezov (sergiusens)]

On Fri, May 16, 2014 at 2:44 PM, Peter Hultqvist <email address hidden>wrote:

> Public bug reported:
>
> Running as root:
> # sudo ubuntu-emulator create u1
>
> Creating "u1" from ubuntu-touch/devel revision 28
> Downloading...
> Cannot download
> https://system-image.ubuntu.com/pool/ubuntu-af0e050fca683dd4b7747b616952745496ed8542cece16ca5e6d13f00886d2de.tar.xz:
> mkdir /root/.cache: permission denied
>

This is disturbing, you should not need to write to /root

Can you please provide the output of:
$ env
and
$ sudo env

[Peter Hultqvist (hultqvist)]

I have write access to root from the shell
I can successfully run every command that is reported as failed from ubuntu-emulator.

mount report
/dev/mapper/sda5_crypt on / type ext4 (rw,errors=remount-ro)

[Sergio Schvezov (sergiusens)]

If you must run as root, make sure you are real root; why are you running as root and not as $USER peter?

[Peter Hultqvist (hultqvist)]

If I run the following as my regular user I get an error:

$ ubuntu-emulator create u1
Creation requires sudo/pkexec (root)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Diddier A Hilarion B (didtux)]

I have had the same problem recently, as a debian user who uses Ubuntu ocasionally i don't have familiarity with the way sudo works, i have noticed this problem doesn't happen when you have a shell obtained by the su command, so i think sudo su is not the same as obtaining the shell by su and sudo "command" is not the same as executing the command as root.

I solved the problem doing sudo su setting a password for root, entering as root with su and doing ubuntu-emulator create myinstance

[aggelalex (aggelalex-ppa)]

I found the cause of the problem:

When executing sudo, you *gain* some root previlages, but you are not root.
Which means that you don't have any access to /root by using sudo
But sudo sets $HOME to /root, so sudo's home is /root, but can't be accessed by sudo

to solve this just run this:
$ sudo -i
# HOME=/home/<your user name>

and continue with your commands. When done execute this:
# exit

and now you're out of root user.

[Parmesh (parmesh-aavula)]

I got following Error when creating a ubuntu emulator, please help me to get out of this error

Creating "UbuntuTouch" from ubuntu-touch/devel revision 2
Downloading...
Cannot download https://system-image.ubuntu.com/pool/ubuntu-25515e1c8e1c835c56967a78744cae98fba62da5212261dc31fb7afd92031f89.tar.xz: mkdir /root/.cache: permission denied

[Luca Weiss (z3ntu)]

Why does this bug still exist? It was reported over 2 years ago...

[WESERTRAINER Flight Training (s-service)]

Unfortunately this bug still exist:

Package: ubuntu-device-flash 0.33-0ubuntu1~xenial-staging i386

sudo ubuntu-device-flash --server=http://system-image.ubports.com touch --device=turbo --channel=ubports-touch/16.04/rc --bootstrap --recovery-image=./ubuntu-touch/recovery-turbo.img --wipe
2018/08/12 14:53:15 Device is |turbo|
2018/08/12 14:53:20 Flashing version 8 from ubports-touch/16.04/rc channel and server http://system-image.ubports.com to device turbo
2018/08/12 14:53:20 mkdir /home/myusername/.cache/ubuntuimages/pool: permission denied

Any solutions ?