diff --git a/inst b/inst
new file mode 100644
index 0000000..0ca4589
--- /dev/null
+++ b/inst
@@ -0,0 +1,18 @@
+COLOR_RESET="\033[0m"
+
+echo -e "\033[48;5;11m\033[38;5;21m ◇  INSTRUCTION  ◇ ${COLOR_RESET}"
+
+if [ -z "$1" ]; then
+echo -e "\033[48;5;11m\033[38;5;21m ◇ 1. docker  ◇ ${COLOR_RESET}"
+echo -e "\033[48;5;11m\033[38;5;21m ◇ 2. terminal  ◇ ${COLOR_RESET}"
+echo -e "\033[48;5;11m\033[38;5;21m ◇ 3. git  ◇ ${COLOR_RESET}"
+echo -e "\033[48;5;11m\033[38;5;21m ◇ 4. poetry  ◇ ${COLOR_RESET}"
+fi
+
+
+
+- shell script command
+which
+
+where 윈도우 환경에서 사용하는 명령어 
+