From 150b43b62b9d38c43af7f10e304c971248947719 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Sat, 23 Nov 2019 01:38:27 +0800
Subject: [PATCH] add usage

---
 README.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 5d3d0ec..0bf6d9c 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,15 @@
 
 Digest tool written in Rust programming language
 
+Usage:
+```shell
+$ digest -a sha256 LICENSE 
+SHA256: e36f811f31f3ad9d2ba68230258747bcb868ab59e8640fab3733fbe179bb7cf4
+```
 
 Install:
 ```shell
-cargo install --git https://git.hatter.ink/hatter/digest.git
+$ cargo install --git https://git.hatter.ink/hatter/digest.git
 ```
 
 Supported algorithms:<br>