Update README.md

Author: utokato

README.md

@@ -1,2 +1,29 @@
 # Impressive Linux commands cheat sheet cli
-> Copy From https://github.com/chenjiandongx/pls
+> Copy From https://github.com/chenjiandongx/pls
+> And support offline mode
+
+## How to build at Windows
+```shell
+go env -w GOOS=linux
+go build -o pls
+```
+
+## How to use
+1. cp pls to /usr/local/bin and chmod x to it
+```shell
+cp pls /usr/local/bin
+chmod 777 pls
+```
+
+2. upgrade or offline
+```shell
+pls upgrade
+# or
+pls offline
+```
+
+3. search and show
+```shell
+pls search 压缩
+pls show zip
+```