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PartialVolume committed Dec 29, 2022
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| v2021.08.2_21_i586_0.32.023 | v0.32.023 | [.img 32bit](https://github.com/PartialVolume/shredos.x86_64/releases/download/v2021.08.2_21_x86-64_0.32.023/shredos-2021.08.2_21_i586_0.32.023_20220126.img) | [.iso 32 bit](https://github.com/PartialVolume/shredos.x86_64/releases/download/v2021.08.2_21_x86-64_0.32.023/shredos-2021.08.2_21_i586_0.32.023_20220126.iso) |
Note: The .img files for burning to USB flash drives support both bios/UEFI booting. The .iso image currently supports legacy bios booting only and not UEFI, however, a bios/UEFI version of the .iso is in development and will be released shortly.
You can also consider [VENTOY (Open Source tool to create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files)](https://github.com/ventoy/Ventoy) as a workaround to avoid bios/UEFI issues.

#### Demo video showing ShredOS having booted straight into Nwipe where you can then select one or more drives to be erased.

![Example wipe](/images/example_wipe.gif)

1. [What is ShredOS?](https://github.com/PartialVolume/shredos.x86_64#what-is-shredos)
1. [What do I do after I've erased everything on my disk? What is actually erased?](https://github.com/PartialVolume/shredos.x86_64#what-do-i-do-after-ive-erased-everything-on-my-disk-what-is-actually-erased)
1. [Nwipe's erasure methods](https://github.com/PartialVolume/shredos.x86_64#nwipes-erasure-methods)
1. [Obtaining and writing ShredOS to a USB flash drive - The easy way!](https://github.com/PartialVolume/shredos.x86_64#obtaining-and-writing-shredos-to-a-usb-flash-drive-the-easy-way-)
1. [Linux and MAC users](https://github.com/PartialVolume/shredos.x86_64#linux-and-mac-users)
1. [Windows users](https://github.com/PartialVolume/shredos.x86_64#windows-users)
1. [Virtual terminals](https://github.com/PartialVolume/shredos.x86_64#virtual-terminals)
1. [How to run nwipe so you can specify nwipe command line options](https://github.com/PartialVolume/shredos.x86_64#how-to-run-nwipe-so-you-can-specify-nwipe-command-line-options)
1. [How to change the default nwipe options so the change persists between reboots](https://github.com/PartialVolume/shredos.x86_64#how-to-change-the-default-nwipe-options-so-the-change-persists-between-reboots)
1. [How to set the keyboard map using the loadkeys command (see here for persistent change between reboots](https://github.com/PartialVolume/shredos.x86_64#how-to-set-the-keyboard-map-using-the-loadkeys-command-see-here-for-persistent-change-between-reboots)
1. [How to make a persistent change to keyboard maps](https://github.com/PartialVolume/shredos.x86_64#how-to-make-a-persistent-change-to-keyboard-maps)
1. [Reading and saving nwipes log files - via USB (manually) or ftp (manually & automatically)](https://github.com/PartialVolume/shredos.x86_64#reading-and-saving-nwipes-log-files---via-usb-manually-or-ftp-manually--automatically)
1. [Transferring nwipe log files to a USB storage device](https://github.com/PartialVolume/shredos.x86_64#transferring-nwipe-log-files-to-a-usb-storage-device)
1. [Transferring nwipe log files to a ftp server](https://github.com/PartialVolume/shredos.x86_64#transferring-nwipe-log-files-to-a-ftp-server)
1. [How to wipe drives on headless systems or systems with faulty display hardware. (For use on secure LANs only)](https://github.com/PartialVolume/shredos.x86_64#how-to-wipe-drives-on-headless-systems-or-systems-with-faulty-display-hardware-for-use-on-secure-lans-only)
1. [The latest ShredOS now includes the following](https://github.com/PartialVolume/shredos.x86_64#the-latest-shredos-now-includes-the-following)
1. [smartmontools](https://github.com/PartialVolume/shredos.x86_64#smartmontools)
1. [hexedit](https://github.com/PartialVolume/shredos.x86_64#hexedit)
1. [hdparm](https://github.com/PartialVolume/shredos.x86_64#hdparm)
1. [Compiling shredos and burning to USB stick, the harder way!](https://github.com/PartialVolume/shredos.x86_64#compiling-shredos-and-burning-to-usb-stick-the-harder-way-)
1. [What is ShredOS?](#what-is-shredos)
1. [What do I do after I've erased everything on my disk? What is actually erased?](#what-do-i-do-after-ive-erased-everything-on-my-disk-what-is-actually-erased)
1. [Nwipe's erasure methods](#nwipes-erasure-methods)
1. [Obtaining and writing ShredOS to a USB flash drive - The easy way!](#obtaining-and-writing-shredos-to-a-usb-flash-drive-the-easy-way-)
1. [Linux and MAC users](#linux-and-mac-users)
1. [Windows users](#windows-users)
1. [Multi OS with VENTOY](#multi-os-with-ventoy)
1. [Virtual terminals](#virtual-terminals)
1. [How to run nwipe so you can specify nwipe command line options](#how-to-run-nwipe-so-you-can-specify-nwipe-command-line-options)
1. [How to change the default nwipe options so the change persists between reboots](#how-to-change-the-default-nwipe-options-so-the-change-persists-between-reboots)
1. [How to set the keyboard map using the loadkeys command (see here for persistent change between reboots](#how-to-set-the-keyboard-map-using-the-loadkeys-command-see-here-for-persistent-change-between-reboots)
1. [How to make a persistent change to keyboard maps](#how-to-make-a-persistent-change-to-keyboard-maps)
1. [Reading and saving nwipes log files - via USB (manually) or ftp (manually & automatically)](#reading-and-saving-nwipes-log-files---via-usb-manually-or-ftp-manually--automatically)
1. [Transferring nwipe log files to a USB storage device](#transferring-nwipe-log-files-to-a-usb-storage-device)
1. [Transferring nwipe log files to a ftp server](#transferring-nwipe-log-files-to-a-ftp-server)
1. [How to wipe drives on headless systems or systems with faulty display hardware. (For use on secure LANs only)](#how-to-wipe-drives-on-headless-systems-or-systems-with-faulty-display-hardware-for-use-on-secure-lans-only)
1. [The latest ShredOS now includes the following](#the-latest-shredos-now-includes-the-following)
1. [smartmontools](#smartmontools)
1. [hexedit](#hexedit)
1. [hdparm](#hdparm)
1. [Compiling shredos and burning to USB stick, the harder way!](#compiling-shredos-and-burning-to-usb-stick-the-harder-way-)
1. [Install the following prerequisite software first. Without this software, the make command will fail](https://github.com/PartialVolume/shredos.x86_64/blob/master/README.md#install-the-following-prerequisite-software-first-without-this-software-the-make-command-will-fail)
1. [Download the ShredOS source using the git command and build ShredOS](https://github.com/PartialVolume/shredos.x86_64/blob/master/README.md#download-the-shredos-source-using-the-git-command-and-build-shredos)
1. [Commands to configure buildroot, you will only need to use these if you are making changes to ShredOS](https://github.com/PartialVolume/shredos.x86_64/blob/master/README.md#commands-to-configure-buildroot-you-will-only-need-to-use-these-if-you-are-making-changes-to-shredos)
Expand All @@ -60,11 +62,11 @@ Note: The .img files for burning to USB flash drives support both bios/UEFI boot
1. [../board/shredos/fsoverlay/](https://github.com/PartialVolume/shredos.x86_64/blob/master/README.md#boardshredosfsoverlay)
1. [../board/shredos/fsoverlay/etc/init.d/S40network](https://github.com/PartialVolume/shredos.x86_64/blob/master/README.md#boardshredosfsoverlayetcinitds40network)
1. [../board/shredos/fsoverlay/usr/bin/nwipe_launcher](https://github.com/PartialVolume/shredos.x86_64/blob/master/README.md#boardshredosfsoverlayusrbinnwipe_launcher)
1. [../package/nwipe/](https://github.com/PartialVolume/shredos.x86_64#packagenwipe)
1. [../package/nwipe/nwipe.mk](https://github.com/PartialVolume/shredos.x86_64#packagenwipenwipemk)
1. [../package/nwipe/nwipe.hash](https://github.com/PartialVolume/shredos.x86_64#packagenwipenwipehash)
1. [../package/nwipe/Config.in](https://github.com/PartialVolume/shredos.x86_64#packagenwipeconfigin)
1. [../package/nwipe/002-nwipe-banner-patch.sh](https://github.com/PartialVolume/shredos.x86_64#packagenwipe002-nwipe-banner-patchsh)
1. [../package/nwipe/](#packagenwipe)
1. [../package/nwipe/nwipe.mk](#packagenwipenwipemk)
1. [../package/nwipe/nwipe.hash](#packagenwipenwipehash)
1. [../package/nwipe/Config.in](#packagenwipeconfigin)
1. [../package/nwipe/002-nwipe-banner-patch.sh](#packagenwipe002-nwipe-banner-patchsh)

## What is ShredOS?
ShredOS is a USB bootable (BIOS or UEFI) small linux distribution with the sole purpose of securely erasing the entire contents of your
Expand All @@ -74,7 +76,7 @@ ShredOS supports either 32bit or 64bit processors. You will need to download the

ShredOS can be used as a software image and booted from PXE capable systems from a PXE server.

You can also use ShredOS on headless systems or systems with faulty display hardware as it includes a user enabled telnet server. Further details can be found here. [How to wipe drives on headless systems or systems with faulty or missing display hardware or keyboards](https://github.com/PartialVolume/shredos.x86_64#how-to-wipe-drives-on-headless-systems-or-systems-with-faulty-display-hardware-for-use-on-secure-lans-only)
You can also use ShredOS on headless systems or systems with faulty display hardware as it includes a user enabled telnet server. Further details can be found here. [How to wipe drives on headless systems or systems with faulty or missing display hardware or keyboards](#how-to-wipe-drives-on-headless-systems-or-systems-with-faulty-display-hardware-for-use-on-secure-lans-only)

ShredOS includes the latest Nwipe official release, but in addition includes other disc related utilities such as Smartmontools, hdparm, a hexeditor [hexedit](https://linux.die.net/man/1/hexedit), and, the program loadkeys which can be used for [setting the keyboard layout](https://github.com/PartialVolume/shredos.2020.02/blob/master/README.md#how-to-set-the-keyboard-map-using-the-loadkeys-command-see-here-for-persistent-change-between-reboots). Nwipe automatically starts it's GUI in the first virtual terminal (ALT-F1), hdparm, smartmontools and hexeditor can be run in the second virtual terminal, (ALT-F2). Nwipe will erase drives using a user selectable choice of seven methods. hdparm - amongst many of its options - can be used for wiping a drive by [issueing ATA erase commands to the drive's internal firmware](https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase). This is a planned feature addition to nwipe.

Expand Down Expand Up @@ -105,11 +107,11 @@ Nwipe also includes the following pseudo random number generators:
* Mersenne Twister (mt19937ar-cok)
* ISAAC (rand.c 20010626)

## Obtaining and writing ShredOS to a USB flash drive, the easy way !
## Obtaining and writing ShredOS to a USB flash drive, the easy way!

You can of course compile ShredOS from source but that can take a long time and you can run into all sorts of problems if your not familiar with compiling an operating system. So if you just want to get started with using ShredOS and nwipe then just download the ShredOS image file and write it to a USB flash drive. Please note this will over write the existing contents of your USB flash drive.

Download the latest ShredOS for either 32bit, 64bit, .img or .iso from [here](https://github.com/PartialVolume/shredos.x86_64#download-img-and-iso-files-for-burning-to-usb-flash-drives-and-cd-rdvd-r)
Download the latest ShredOS for either 32bit, 64bit, .img or .iso from [here](#download-img-and-iso-files-for-burning-to-usb-flash-drives-and-cd-rdvd-r)

#### Linux (and MAC) users

Expand All @@ -131,7 +133,19 @@ dd if=shredos.img of=/dev/sdx
#### Windows users:
If you are a windows user, use a program such as [Rufus](https://rufus.ie/) or [etcher](https://www.balena.io/etcher/) to write the image file to a USB stick, remembering that the entire contents of the USB flash drive will be overwritten. [Winzip](https://www.winzip.com/win/en/) can be used to extract the shredos.img file from the compressed shredos.img.tar.gz file that you downloaded. [hashtab](http://implbits.com/products/hashtab/) can be downloaded and used to confirm the sha1 checksum.

#### Multi OS with VENTOY
As explained on the [GitHub repository](https://github.com/ventoy/Ventoy):
> Ventoy is an open source tool to create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files.
With ventoy, you don't need to format the disk over and over, you just need to copy the image files to the USB drive and boot it. You can copy many image files at a time and ventoy will give you a boot menu to select them.
You can also browse ISO/WIM/IMG/VHD(x)/EFI files in local disk and boot them.
x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI, ARM64 UEFI and MIPS64EL UEFI are supported in the same way.
Both MBR and GPT partition style are supported in the same way.
Most type of OS supported(Windows/WinPE/Linux/Unix/ChromeOS/Vmware/Xen...)
920+ ISO files are tested (List). 90%+ distros in distrowatch.com supported (Details).

Once your USB removable drive is having VENTOY installed, you just have to copy the latest .iso version of ShredOS at the root.

## Virtual Terminals
ShredOS has three tty terminals, ALT-F1 (Where nwipe is initially launched), ALT-F2 (A virtual terminal), ALT-F3 (console log, login required which is root with no password).

Expand Down Expand Up @@ -276,7 +290,7 @@ Options:
--exclude=/dev/sdc,/dev/sdd
--exclude=/dev/sdc,/dev/sdd,/dev/mapper/cryptswap1
```
## How to set the keyboard map using the loadkeys command (see [here](https://github.com/PartialVolume/shredos.x86_64#how-to-make-a-persistent-change-to-keyboard-maps) for persistent change between reboots)
## How to set the keyboard map using the loadkeys command (see [here](#how-to-make-a-persistent-change-to-keyboard-maps) for persistent change between reboots)
You can set the type of keyboard that you are using by typing, `loadkeys uk`, `loadkeys us`, `loadkeys fr`, `loadkeys cf`, `loadkeys by`, `loadkeys cf`, `loadkeys cz` etc. See /usr/share/keymaps/i386/ for full list of keymaps. However you will need to add an entry to `loadkeys=uk` etc to grub.cfg for a persistent change between reboots.

Examples are:
Expand Down

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