The issue: as far as I know, no editor shreds old versions of files upon writing new versions. How do you keep data off of a hard drive? Use the ramdisk.
#!/bin/sh ## /usr/local/bin/reset-ramdisk ## if `df | grep -q ramdisk` ;then umount /dev/ramdisk fi shred -n 2 /dev/ramdisk /sbin/mke2fs -q /dev/ramdisk mkdir -p /mnt/ramdisk mount /dev/ramdisk /mnt/ramdisk chmod 777 /mnt/ramdisk
Run that code before and after you are done with your work.
(Assumes a single-user system.) Don't forget to turn off swap!
$ sudo /sbin/swapoff -a