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* Overview
# sudo cp /root/.restic-env
# sudo cp /root/restic-exclude.txt
# sudo chmod 600 /root/.restic-env
# sub the values for /root/.restic-env
You need to initialize the restic repository first before you can back up to it. This is a one-time step:
#+begin_src sh
sudo bash -c 'source /root/.restic-env && restic init'
#+end_src
sudo systemctl daemon-reload
sudo systemctl enable --now backup-cloud.timer
# Verify
systemctl list-timers backup-cloud.timer
** Restoring from Restic
#+begin_src sh
sudo bash -c 'source /root/.restic-env && restic snapshots' # list snapshots
sudo bash -c 'source /root/.restic-env && restic ls latest /home/benj' # browse
sudo bash -c 'source /root/.restic-env && restic restore latest --target /tmp/restore' # full restore
sudo bash -c 'source /root/.restic-env && restic restore latest --target /tmp/restore --include /home/benj/somefile' # specific file
#+end_src
** Disaster Recovery ISO
This creates a bootable ISO that contains your disk layout, bootloader config, and everything needed to do a bare-metal restore onto a new or wiped machine.
*** Install
#+begin_src sh
# From AUR
paru -S rear # or yay -S rear
#+end_src
*** Configure
Edit =/etc/rear/local.conf=:
#+begin_src conf
OUTPUT=ISO
OUTPUT_URL=file:///root/rear-output/
BACKUP=NETFS
BACKUP_URL=file:///mnt/backup/rear/
BACKUP_PROG_EXCLUDE=("${BACKUP_PROG_EXCLUDE[@]}" '/var/lib/docker' '/var/cache/pacman/pkg' '/home/benj/.cache' '/home/benj/.rustup' '/home/benj/.ghcup' '/home/benj/.stack' '/home/benj/.espressif' '/home/benj/go/pkg' '/home/benj/Android' '/home/benj/.npm/_cacache' '/home/benj/.cargo/registry' '/home/benj/.cargo/git' '/home/benj/.android/avd' '/var/log/journal' '/var/lib/systemd/coredump')
#+end_src
*** Create Recovery ISO
#+begin_src sh
# With external drive mounted at /mnt/backup:
sudo mkdir -p /root/rear-output /mnt/backup/rear
sudo rear -v mkbackup
#+end_src
This produces:
- =/root/rear-output/rear-*.iso= — bootable recovery ISO
- =/mnt/backup/rear/= — the backup archive
*/ Using Rear to Restore
1. Write the ISO to a USB stick: =sudo dd if=/root/rear-output/rear-*.iso of=/dev/sdX bs=4M status=progress=
2. Boot from it on the new/wiped machine
3. Select "Recover" from the menu
4. Rear automatically:
- Recreates your partition layout
- Sets up LUKS (it will ask for your passphrase)
- Creates LVM
- Restores all files
- Installs the bootloader
5. Reboot into your restored system
** When to Regenerate the ISO
- After major system changes (new partitions, bootloader changes)
- Monthly alongside your regular backups
- After adding/removing LUKS keyslots
** Verification (Montly)
Create =/usr/local/bin/backup-verify=:
#+begin_src bash
#!/bin/bash
set -euo pipefail
source /root/.restic-env
echo "=== B2 Snapshots ==="
restic snapshots --latest 10
echo ""
echo "=== Repository Integrity (sampling 5%) ==="
restic check --read-data-subset=5%
echo ""
echo "=== Repository Size ==="
restic stats
echo ""
echo "=== Rear ISO ==="
ls -lh /root/rear-output/rear-*.iso 2>/dev/null || echo "WARNING: No Rear ISO found! Run: sudo rear -v mkbackup"
echo ""
echo "=== LUKS Header Backup ==="
ls -lh /root/luks-header-backup 2>/dev/null || echo "WARNING: No LUKS header backup! Run the backup immediately."
#+end_src
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