On Tue, Sep 21, 2021 at 12:50:18PM -0400, Michael Stone wrote: > Well, chattr -i turns that off > > On Tue, Sep 21, 2021 at 04:29:07PM +0000, Toni Mas Soler wrote: > > I use to backup my iPhone's photo library using a stfp connection (all in > > the same directory in my PC). Thus, I can chattr +i the only directory > > needed and nobody can remove. > > > > I cannot understand why chattr does not achieve you. > > > > Toni Mas > > GPG 3F42A21D84D7E950 > > > > Sent with ProtonMail Secure Email. > > > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ > > > > El dimarts, 21 de setembre 2021 a les 17:53, Tim Woodall > > <debianu...@woodall.me.uk> va escriure: > > > > > I would like to have some WORM memory for my backups. At the moment > > > > > > > > they're copied to an archive machine using a chrooted unprivileged user > > > > > > > > and then moved via a cron job so that that user cannot delete them > > > > > > > > (other than during a short window). > > > > > > > > My though was to use a raspberry-pi4 to provide a USB mass storage > > > > > > > > device that is modified to not permit deleting. If the pi4 is not > > > > > > > > accessible via the network then other than bugs in the mass storage API > > > > > > > > it should be impossible to delete things without physical access to the > > > > > > > > pi. > > > > > > > > Before I start reinventing the wheel, does anyone know of anything > > > > > > > > similar to this already in existence? > > > > > > > > Things like chattr don't achieve what I want as root can still override > > > > > > > > that. I'm looking for something that requires physical access to delete. > > >
Write only storage - DVD-R or equivalent Blu-Ray - but make sure to end the session. Deletion - feed through a paper shredder. Or something with a physical write tab that can't be overwritten a la 3.5" floppy disk. All the very best, Andy Cater