System restore 2 (fsarchiver)

The two scripts below are for restoring a backup archive of a linux system or user home using fsarchiver.

The first script (system restore) works at partition level, checks if the partition is mounted, unmounts it and unpacks the archive there.

The 2nd script (user home restore) works at dir level and looks for a dir in /home or another partition, or uses /mnt/tmp. It is advisable to create a new dir there (you can do this during dir selection by typing 'm' and it will ask for new dir name) and not unpack onto your current user home. You could also unpack a user home backup archive into /mnt/tmp and then run rsync to copy files into your running user home.

See my System backup page for more info.

1. System restore (with fsarchiver)

#!/bin/bash
# bkprestore-sys-fs
# Quick system restore with fsarchiver, by David Quinton, two days in Dec 2025
# Only operates with archives made with fsarchiver (.fsa extensions).
# Make Linux not war!!

#===================================Variables
Loc=/media/Bkp/zsysbkp
ZSTD_NBTHREADS=0

#===================================Functions
chooseFile () {
	cd $Loc
	while true; do
	clear
	printf '\n%.0s' {1..10}; printf "Choose an archive to restore!
	../ to enter parent directory.\n\n"
	ls -dhl --color=auto "$(pwd)"
	IFS=$'\n' COLUMNS=1 PS3="Enter choice:"
	options=(../ $(ls -hl . 2>/dev/null))          # ls -hl /media/Bkp/zsysbkp | grep -e 'xz' -e 'zst' -e 'fsa'
	select opt in "${options[@]}"; do
		FilePath=$(pwd)/$(echo "$opt" | awk '{print $9}')
		case $opt in
			../) cd .. && break ;;
			*) if [[ -f "$FilePath" ]]; then       #check if $FilePath is a file, then File=FilePath
				File=$FilePath;  break 3
				elif [[ "$opt" ]]; then
					dirname=$(echo "$opt" | awk '{print $9}')
					cd "$dirname";  break					#if $opt is a dir then cd
				else break; fi ;;
		esac
	done
done

# determine ext of $File, 1st strip path from $File, then grep ext and test success or not
file=`basename $File`
	if [[ `echo $file | grep '\.fsa'` ]]; then  break    #check if file contains string .fsa
	else printf "Your file does not carry an .fsa extension! Aborting now!"; exit 0
	fi
}

#select partition
choosePart () {
	while true; do
	clear; lsblk
	printf '\n%.0s' {1..5}; printf "\tSelect a partition - Warning it will be overwritten!\n\n"
	PS3="Select (type C to cancel): "
	options=($(ls /sys/class/block | grep -E '^(sd|hd|vd|nvme)[a-z][0-9]+|[0-9]p[0-9]+'))
	select opt in "${options[@]}"; do
        if [[ "$REPLY" == [cC] ]]; then
            echo "Aborted!" && return 1
		elif [[ -n "$opt" ]]; then Part=/dev/$opt; return 0
        else printf "Invalid option"
    fi
	done
done
}

formatPart () {
#check if part is mounted, find its mount point and mount at /mnt if not
	if findmnt $Part > /dev/null; then 	
		mounted=$(findmnt -n -o TARGET $Part); printf "Unmounting the partition $Part"; sudo umount $mounted
	else printf "\n\n\tGood news, $Part is not mounted! Continuing..."
	fi
	
}

#===================================Unpack commands
unpackFile () {
	sudo fsarchiver restfs -j 14 $File id=0,dest=/dev/$opt,mkfs=ext4
}

taskConfirm () {
	while true; do
	clear
	printf '\n%.0s' {1..4}; printf "\tTask set.....\n\n
	Archive: $File \n\n\tTarget: /dev/$opt!\n\n
	Hit Enter to proceed! Or type C and Enter to abort!\n"
	read ans
	case $ans in
		"") unpackFile; break 2 ;;
		[cC]*) exit 0 ;;
		*) break ;;
	esac
done	
}

#===================================Start
chooseFile
choosePart
formatPart
taskConfirm

2. User home restore (with fsarchiver)

#===================================Variables
Loc=/media/Bkp/zsysbkp
ZSTD_NBTHREADS=0

#===================================Functions
chooseFile () {
	cd $Loc
	while true; do
	clear
	printf '\n%.0s' {1..10}; printf "Choose an archive to restore! (.fsa)
	../ to enter parent directory.\n\n"
	ls -dhl --color=auto "$(pwd)"
	IFS=$'\n' COLUMNS=1 PS3="Enter choice:"
	options=(../ $(ls -hl . 2>/dev/null))          # ls -hl /media/Bkp/zsysbkp | grep -e 'xz' -e 'zst' -e 'fsa'
	select opt in "${options[@]}"; do
		FilePath=$(pwd)/$(echo "$opt" | awk '{print $9}')
		case $opt in
			../) cd .. && break ;;
			*) if [[ -f "$FilePath" ]]; then       #check if $FilePath is a file, then File=FilePath
				File=$FilePath;  break 3
				elif [[ "$opt" ]]; then
					dirname=$(echo "$opt" | awk '{print $9}')
					cd "$dirname";  break					#if $opt is a dir then cd
				else break; fi ;;
		esac
	done
done

#===================================Unpack commands
unpackFile () {
	sudo fsarchiver restfs -vo -j 14 $File id=0,dest=/dev/$opt,mkfs=ext4
	sudo mount /dev/$opt /mnt/$opt && printf "\n\n\t/dev/$opt mounted to /mnt/$opt\n\n"
}

taskConfirm () {
	while true; do
	clear
	printf '\n%.0s' {1..4}; printf "\tTask set.....\n\n
	Archive: $File \n\n\tTarget: /dev/$opt\n\n
	Hit Enter to proceed! Or type C and Enter to abort!\n"
	read ans
	case $ans in
		"") unpackFile; break 2 ;;
		[cC]*) exit 0 ;;
		*) break ;;
	esac
done	
}

#===================================Start
chooseFile
choosePart
formatPart
taskConfirm