diff --git a/usr/bin/bsconn.py b/usr/bin/bsconn.py
deleted file mode 100755
index c5db6d6..0000000
--- a/usr/bin/bsconn.py
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/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 < "$FILE"
-
-exit 0
-
diff --git a/usr/bin/history-del b/usr/bin/history-del
new file mode 100755
index 0000000..c84deb2
--- /dev/null
+++ b/usr/bin/history-del
@@ -0,0 +1,8 @@
+#!/usr/bin/bash
+
+NB_LINES=${1:=5}
+for ((i=0;i<NB_LINES;i++))
+	do
+		history -d $(history | tail -n 1 | awk '{print $1}')
+	done
+history -w