Dtyjlui

I have installed Ubuntu subsystem on Windows 10 (after enabling feature in settings), but where is the Ubuntu file system root directory located in the drive?

For Ubuntu installed from the Windows store:

Each distribution you install through the store is installed to that
application's appdata directory. For example:
C:Users<username>AppDataLocalPackagesCanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgscLocalState - benhillis

In earlier iterations of Windows Subsystem for Linux, the Ubuntu file system was at %localappdata%Lxss (e.g., C:UsersUsernameAppDataLocalLxss - replace the Username with your Username on Windows). See the WSL blog post on File System Support:

The primary file system used by WSL is VolFs. It is used to store the
Linux system files, as well as the content of your Linux home
directory. As such, VolFs supports most features the Linux VFS
provides, including Linux permissions, symbolic links, FIFOs, sockets,
and device files.

VolFs is used to mount the VFS root directory, using
%LocalAppData%lxssrootfs as the backing storage. In addition, a
few additional VolFs mount points exist, most notably /root and
/home which are mounted using %LocalAppData%lxssroot and
%LocalAppData%lxsshome respectively. The reason for these separate
mounts is that when you uninstall WSL, the home directories are not
removed by default, so any personal files stored there will be
preserved.

CAUTION

Creating/modifying any files within the Linux subsystem using Windows apps & tools can cause Data corruption and data loss in Ubuntu subsystem! (Thanks to Rich Turner for suggesting these words of caution!) This is absolutely not supported. From the same blog post:

Interoperability with Windows

While VolFs files are stored in regular files on Windows in the
directories mentioned above, interoperability with Windows is not
supported. If a new file is added to one of these directories from
Windows, it lacks the EAs needed by VolFs, so VolFs doesn’t know what
to do with the file and simply ignores it. Many editors will also
strip the EAs when saving an existing file, again making the file
unusable in WSL.

Your Windows file system is located at /mnt/c in the Bash shell environment.

Source: Dustin Kirkland's blog, howtogeek

This seems to have changed since Bash was originally introduced, and does not apply to distributions from the Windows Store, or maybe it is not consistent for all systems as my home directory is located in another location:

%localappdata%lxsshome{username}

or:

C:Users{user}AppDataLocallxss{username}

Where {user} is your Windows Username and {username} is your UNIX Username set during install.

So the root directory would be:

%localappdata%lxss

Note that the root directory may not be visible in Windows Explorer from the %localappdata% directory. You should be able to access it anyways by typing it in the 'address bar' of Explorer.

If you install Linux from MS Market:

• Free Ubuntu in Windows store


• Free Open Suse in Windows store

they placed distros under:

$ cat /proc/registry/HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Lxss/{861c29b4-ebe2-49a5-8a22-7e53a27934a0}/BasePath

C:UsersuserAppDataLocalPackagesCanonicalGroupLimited.UbuntuonWindows_79rhkp1fndgscLocalState

Default distro defined by:

bash# cat /proc/registry/HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Lxss/DefaultDistribution

{861c29b4-ebe2-49a5-8a22-7e53a27934a0}

Linux root is deeper:

c:/Users/user/AppData/Local/Packages/46932SUSE.openSUSELeap42.2_022rs5jcyhyac/LocalState/rootfs

PS. I used Cygwin to explore registry keys.

If using PowerShell for the same goal, the commands would be:

# obtain the value of the ID of the default Linux distribution (and store it in a variable to avoid escaping characters issues):

$DEFAULT_LXSS_ID = (Get-ItemPropertyValue -Path REGISTRY::HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionLxss -name DefaultDistribution)



# which will have a value like:

echo  $DEFAULT_LXSS_ID

{bde539d6-0c87-4e12-9599-1dcd623fbf07}



# display the directory containing the rootfs Windows directory (mapped to the / Linux directory)

Get-ItemPropertyValue -Path REGISTRY::HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionLxss$DEFAULT_LXSS_ID -name BasePath | Format-List -property "BasePath"

%LocalAppData%PackagesCanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgscLocalState

PPS. https://blogs.msdn.microsoft.com/commandline/2016/11/17/do-not-change-linux-files-using-windows-apps-and-tools/

The only thing that worked for me was %localappdata%lxsshome{username}, where the {username} is your BASH username you gave it during the installation. For some reason, after showing hidden folder's lxss refuses to appear in C:UsersWINDOWS-USERAppDataLocal, and also giving the full C: path with windows and BASH username does not work either.

And please create a desktop shortcut for what works.