Need help with LUKS encryption RPi3

[vik1ngsec]

Hello,
I'm newbie here and need some community help.
Iam following the article here: https://www.kali.org/tutorials/secure-kali-pi-2018/ problem occurs during the step "Backup and Restore"

Now insert the SD card and validate the device ID. In our case, the device is /dev/sdc2 but yours might be different so adjust as necessary on your system. We mount the device and make a backup of the filesystem

In my case Kali 2018.2 on WMware player determines sdcard as mmcblk0 with 2 partitions:
/dev/mmcblk0p1 bootable
/dev/mmcblk0p2 partition with file system

mount /dev/mmcblk0p2 /mnt/chroot/
rsync -avh /mnt/chroot/* /mnt/backup/
umount /mnt/chroot

After a successful backuping /mnt/chroot/*

echo -e "d\n2\nw" | fdisk /dev/mmcblk0

fdisk swears at \ n2 \ as an unknown attribute


According to the help menu, I did not understand what this attributes means

Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display / entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)

Then

echo -e "d\n2\nw" | fdisk /dev/mmcblk0

it means:
1. fdisk / dev / mmcblk0
2. d - delete a partition
3. n2 - add a new partition? 2 is the 2nd section?
4. n - add a new partition? w - write table to disk and exit


Next command the same

echo -e "n\np\n2\n\n\nw" | fdisk

Please help how should these commands look in my case?

[steev]

\n is actually "newline" aka "hit enter"

what it's actually saying to do for the script is:

echo -e (expand) "d" (delete) (press enter) "2" (the second partition) (press enter) "w" (write the changes) | (pipe the changes to...) fdisk

then the next line

echo -e (expand) "n" (new) (press enter) "p" (partition) (press enter) "2" (partition number should be 2) (press enter) (press enter) (press enter) "w" (write the changes) | (pipe the changes to...) fdisk

The only time i've seen fdisk respond like that is if i've actually forgotten to type the -e (expand)

Doing it manually, which is what we're avoiding by doing the echo, it's simply, fdisk /dev/mmcblk0 - delete the second partition, then create a new partition, numbered 2, and accept the options it gives you for the start and ending points, then write, then continue on.