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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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What's on your personal server? (lemmy.sdf.org)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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Either self-hosted or cloud, I assume many of you keep a server around for personal things. And I'm curious about the cool stuff you've got running on your personal servers.

What services do you host? Any unique stuff? Do you interact with it through ssh, termux, web server?

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[–] [email protected] 2 points 3 months ago (1 children)

can you tell us how you got this running with an encrypted SD card?

[–] [email protected] 7 points 3 months ago (1 children)

That was really hard to do. I created a note for myself and I will also publish it on my website. You can also decrypt the sd using fido2 hardware key (I have a nitrokey). If you don't need that just skip steps that are for fido2.

The note:

Download the image.

Format SD card to new DOS table:

Boot: 512M 0c W95 FAT32 (LBA)
Root: 83 Linux

As root:

xz -d 2023-12-11-raspios-bookworm-arm64-lite.img.xz
losetup -fP 2023-12-11-raspios-bookworm-arm64-lite.img
dd if=/dev/loop0p1 of=/dev/mmcblk0p1 bs=1M
cryptsetup luksFormat --type=luks2 --cipher=xchacha20,aes-adiantum-plain64 /dev/mmcblk0p2
systemd-cryptenroll --fido2-device=auto /dev/mmcblk0p2
cryptsetup open /dev/mmcblk0p2 root
dd if=/dev/loop0p2 of=/dev/mapper/root bs=1M
e2fsck -f /dev/mapper/root
resize2fs -f /dev/mapper/root
mount /dev/mapper/root /mnt
mount /dev/mmcblk0p1 /mnt/boot/firmware
arch-chroot /mnt

In chroot:

apt update && apt full-upgrade -y && apt autoremove -y && apt install cryptsetup-initramfs fido2-tools jq debhelper git vim -y
git clone https://github.com/bertogg/fido2luks && cd fido2luks
fakeroot debian/rules binary && sudo apt install ../fido2luks*.deb
cd .. && rm -rf fido2luks*

Edit /etc/crypttab:

root            /dev/mmcblk0p2          none            luks,keyscript=/lib/fido2luks/keyscript.sh

Edit /etc/fstab:

/dev/mmcblk0p1    /boot/firmware  vfat    defaults          0       2
/dev/mapper/root  /               ext4    defaults,noatime  0       1

Change root to /dev/mapper/root and add cryptdevice=/dev/mmcblk0p2:root to /boot/firmware/cmdline.txt.

PATH="$PATH:/sbin"
update-initramfs -u

Exit chroot and finish!

umount -R /mnt

[–] [email protected] 2 points 3 months ago (1 children)

Thank you so much! will make a note of this

[–] [email protected] 1 points 3 months ago

No problem ;)