I'm trying to create a sandbox for testing an untrusted software. I'm using Debian, I have installed aufs-tools.
When I try to mount a minimal example with the following command:
mount -t aufs -o dirs=./write=rw:/=ro none ./mount
I'm getting:
mount: wrong fs type, bad option, bad superblock on none,
missing codepage or helper program, or other error
(for several filesystems (e.g. nfs, cifs) you might
need a /sbin/mount.<type> helper program)
In some cases useful info is found in syslog - try
dmesg | tail or so
Using br: instead of dirs= gives the same.
