Other Help Topics :: unionfs help corner

I tried to create a tmpfs partrtion over /bin using unoinfs:

Code Sample

$ sudo mkdir /tmpbin && sudo mount -t tmpfs /tmpbin -o rw,size=256M,nouser,exec /tmpbin && sudo mount -t unionfs -o dirs=/tmpbin=rw:/bin=ro unionfs /bin

Last command gave me some errors:

Quote

mount: wrong fs type, bad option, bad superblock on unionfs,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

And dmesg | tail showed me only two revelant lines:

Quote

[4296879.137000] unionfs: hidden directory '/bin' is not a valid branch
[4296879.137000] unionfs_read_super: error while parsing options (err = -22)

But as I do this:

Code Sample

sudo mkdir /mount1
sudo mount -t tmpfs tmpfs -o rw,size=512k,nouser,exec /mount1
sudo mkdir /mount2
sudo mount -t tmpfs tmpfs -o rw,size=1024k,nouser,exec /mount2
sudo mkdir /unionmount
sudo mount -t unionfs -o dirs=/mount2=rw:/mount1=ro unionfs /unionmount

It works just fine. And when doing df -h it really worked.

See where I'm going? Yes. I want to 'lock' my system even if someone installs a program to my computer it will be there only until next reboot.

I tried this with my Xubuntu Live-CD.
Any help?

original here.