I try to use an MicroSD card containing a chroot environment which I can break, e.g. by installing software, without damaging the OS on my bq Aquaris E4.5 Ubuntu Edition, however I can not let the filesystem being auto-mounted and use the chroot at the same time.
- ext4 and similiar filesystems do not get mounted by ciborium → by default the sd card is not mounted when using ext4, an error is indicated and I am asked to format the disk as vfat
- vfat does not support the execute permission → I cannot run programs of the chroot when the chroot is saved on a vfat partition
- To me there is no known way to start a script automatically on startup (I have found this while searching for an answer) without changing the file-system which is by default intentionally mounted as read-only → I can not easily create a mount script executed on startup
So I wonder whether there is a way to auto-mount an MicroSD-card which can be used to store an chroot without modifying the write-protected parts of the phone.
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