diff --git a/bin/Makefile b/bin/Makefile
index 7c05283..499fe8c 100644
--- a/bin/Makefile
+++ b/bin/Makefile
@@ -15,7 +15,7 @@
PREFIX = $(HOME)
MANPREFIX = $(PREFIX)/local
BIN = ZZZ browser credentials fetch flac2ogg imgresize invidious \
- nyaasearch plumb pstsrv rfcopen screenshot sekrit \
+ nyaasearch plumb pstsrv rbucmd rfcopen screenshot sekrit \
w3m-copy-link
MAN1 = sekrit.1
BROWSER_LINKS = tor-browser
diff --git a/bin/rbucmd.sh b/bin/rbucmd.sh
new file mode 100644
index 0000000..2ee1e5f
--- /dev/null
+++ b/bin/rbucmd.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+# env
+# Written in 2021 by Lucas
+# CC0 1.0 Universal/Public domain - No rights reserved
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty. You should have received a copy of the CC0 Public Domain
+# Dedication along with this software. If not, see
+# .
+
+usage()
+{
+ printf "Usage: %s [-c] [-l login_name] host backup-name\n" \
+ "${0##*/}" >&2
+ exit 1
+}
+
+err()
+{
+ printf "%s: %s\n" "${0##*/}" "$*" >&2
+ exit 1
+}
+
+login_name=$(id -nu)
+agent_mode=yes
+while getopts cl: flag; do
+ case $flag in
+ c) agent_mode=confirm ;;
+ l) login_name=$OPTARG ;;
+ *) usage
+ esac
+done
+shift $((OPTIND - 1))
+if [ $# -ne 2 ] || [ -z "$1" ] || [ -z "$2" ]; then
+ usage
+fi
+host=$1
+backup_name=$2
+
+[ -f "$host/bulist" ] || err "no bulist present in \"$h/\""
+
+eval $(ssh-agent -s)
+trap 'eval $(ssh-agent -ks)' EXIT INT QUIT TERM
+
+set -e
+
+# Load correct key into ssh-agent.
+ssh -o AddKeysToAgent=$agent_mode "$login_name@$host" true
+
+cd "$host"
+tmpdir=$(ssh "$login_name@$host" mktemp -dt rbucmd.XXXXXX)
+
+sftp "$login_name@$host" <\"$tmpdir/bu.sh\"" </tmp/pkg-info.txt &&
+ doas xargs pax -wzf "$tmpdir/$backup_name.tgz" <"$tmpdir/bulist" &&
+ doas chown "$login_name:$login_name" "$tmpdir/$backup_name.tgz"
+EOF
+
+# -t is needed for doas to read a password.
+ssh -t "$login_name@$host" sh "$tmpdir/bu.sh"
+
+sftp -o "user=$login_name" "$host" <