[grgergo]

libimobiledevice[1]'s idevicebackup2 can backup iDevices the same way iTunes does.

[1]⋮ https://libimobiledevice.org/

[anonandwhistle]

Yes there are options but no way I can trust this with my phone data. :) I guess oone option would be cut the network, then backup.After that I nuke the linux? and restore from backup each time.

[grgergo]

It's encrypted/decrypted on the phone if you enable encryption (like iTunes).

[ecedeno]

If this is a concern, you could use a VM without network access to make the backup