diff --git a/usr/bin/aaa b/usr/bin/aaa
new file mode 100755
index 0000000..c5db6d6
--- /dev/null
+++ b/usr/bin/aaa
@@ -0,0 +1,25 @@
+#!/usr/bin/bash
+
+if [ "$#" -lt 1 ] || [ "$#" -gt 3 ]; then
+    echo "Usage: $0 arg1 [arg2] [arg3]"
+    exit 1
+fi
+
+# interactive session check
+if [ -t 0 ]; then
+    echo -n "Delete existing output files? [y/N]: "
+    read ans
+    case "$ans" in
+        y|Y) rm -f *.school ;;
+        *) echo "Aborted"; exit 0 ;;
+    esac
+fi
+
+# process input file
+while IFS= read -r line; do
+    new_f="${line%.*}.school"
+    f > "$new_f"
+done < "$FILE"
+
+exit 0
+
diff --git a/usr/bin/unzip_bruteforce b/usr/bin/unzip_bruteforce
new file mode 100755
index 0000000..0bf551a
--- /dev/null
+++ b/usr/bin/unzip_bruteforce
@@ -0,0 +1,20 @@
+#!/usr/bin/bash
+
+if [ "$#" -lt 1 ] || [ "$#" -gt 3 ]; then
+    echo "Usage: $0 list file.zip"
+    exit 1
+fi
+
+LIST=$1
+FILE=$2
+
+# process input file
+while IFS= read -r line; do
+	echo try: $line
+	if unzip -p $line $FILE ; then
+		echo FOUND : $line
+	fi
+done < "$LIST"
+
+exit 0
+