WSL ubuntu siempre falla con el error "El subproceso /usr/bin/dpkg devolvió un código de error (1)"

Question

Intentando usar ubuntu en el subsistema de Windows win10 para terminal Linux. Pero si ejecuto algún comando, como por ejemplo sudo apt reinstall libpaper1obtengo:

Setting up passwd (1:4.8.1-1ubuntu5.20.04.4) ...
/var/lib/dpkg/info/passwd.postinst: 21: getent: not found
groupadd: group 'shadow' already exists
Group ID 42 has been allocated for the shadow group.  You have either
used 42 yourself or created a shadow group with a different ID.
Please correct this problem and reconfigure with dpkg --configure passwd''.

Note that both user and group IDs in the range 0-99 are globally
allocated by the Debian project and must be the same on every Debian
system.
dpkg: error processing package passwd (--configure):
 installed passwd package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 passwd
E: Sub-process /usr/bin/dpkg returned an error code (1)

Probé varias guías y apt-get install, update, Upgrade, ¡pero siempre aparece este error!