upd

labs/lab2/scripts/script225.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+for cmd in nano vi links; do
+  command -v "$cmd" >/dev/null 2>&1 || { echo "$cmd is not installed"; exit 1; }
+done
+echo "1) nano"
+echo "2) vi"
+echo "3) links"
+echo "4) exit"
+read -r -p "choose 1-4: " choice
+case "$choice" in
+  1) exec nano ;;
+  2) exec vi ;;
+  3) exec links ;;
+  4) exit 0 ;;
+  *) echo "invalid choice" ; exit 1 ;;
+esac
+