/usr/sbin/partimaged-passwd is in partimage-server 0.6.8-2.2ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | #!/bin/bash
####################################################
# partimaged-passwd
# Copyright (C) 2006 Michael Bieb <biebl@debian.org>
####################################################
DB_LOAD=""
DB_DUMP=""
PASSWD_FILE="/etc/partimaged/passwd.db"
if [ $UID -ne 0 ] ; then
	:
	echo "This program has to be run as root!"
	exit 1
fi
# Check for a version of db_load/db_dump
check_db_utils() {
	for i in 5.1 4.8 4.7; do
		if [ -x /usr/bin/db${i}_load ] ; then
			DB_LOAD=/usr/bin/db${i}_load
			DB_DUMP=/usr/bin/db${i}_dump
			return 0
		fi
	done
	return 1
}
help() {
	echo "Manage partimaged user database."
	echo 
	echo "Usage:"
	echo "  $0 [-Dhl] username password"
	echo "  $0 [-Dhl] username"
	echo
	echo "  -D Delete user."
	echo "  -h Display this help message."
	echo "  -l List existing users."
	echo
}
delete_user() {
	echo "Deleting user $1..."
	$DB_DUMP -p $PASSWD_FILE | sed -e '1,/HEADER=END/d' -e '/DATA=END/,$d' | sed 's/^[ \t]*//' | sed "/^$1$/{n;d}" | sed "/^$1$/d" | $DB_LOAD -T -t hash ${PASSWD_FILE}.new
	mv ${PASSWD_FILE}.new $PASSWD_FILE
	fix_rights
}
add_user() {
	echo "Adding user $1..."
	echo -e "$1\n$2" | $DB_LOAD -T -t hash $PASSWD_FILE
	fix_rights
}
list_users() {
	[ -f $PASSWD_FILE ] || exit 0
	echo "Users:"
	$DB_DUMP -p $PASSWD_FILE | sed -e '1,/HEADER=END/d' -e '/DATA=END/,$d' | sed 's/^[ \t]*//' | sed -n '1~2p'
}
fix_rights() {
	chmod 640 $PASSWD_FILE
	chown partimag:partimag $PASSWD_FILE
}
if ! check_db_utils ; then
	echo "Could not find db_load/db_dump!"
	echo "Please install the db5.1-util package."
	exit 1
fi
while getopts D:hl opt 
do
	case "$opt" in
		D) 
			delete_user $OPTARG
			exit 0
			;;
		h) 
			help 
			exit 0
			;;
		l)	
			list_users
			exit 0
			;;
		[?])
			help
			exit 1
			;;
	esac
done
shift $((${OPTIND}-1))
if [ $# -eq 1 ] ; then
	echo -n "New password: "
	read -s passwd1
	echo
	echo -n "Re-type new password: "
	read -s passwd2
	echo
	if [ "$passwd1" != "$passwd2" ] ; then
		echo "Passwords do not match!"
		exit 1
	elif [ -z $passwd1 ] ; then
		echo "Please supply a valid password!"
		exit 1
	else
		add_user $1 $passwd1
	fi
elif [ $# -eq 2 ] ; then
	add_user $1 $2
else
	help
	exit 1
fi
exit 0
 |