diff --git a/Guide-To-Setup-thermal-printer-from-source-code.md b/Guide-To-Setup-thermal-printer-from-source-code.md
index 2c6c6fe..351d522 100644
--- a/Guide-To-Setup-thermal-printer-from-source-code.md
+++ b/Guide-To-Setup-thermal-printer-from-source-code.md
@@ -53,6 +53,9 @@ sudo systemctl start devterm-printer
 now you can test the printer by cat or echo something into `/tmp/DEVTERM_PRINTER_IN`   
 eg: `echo "hello world\n\n\n\n\n\n\n\n\n\n" > /tmp/DEVTERM_PRINTER_IN
 
+we recommend use [tmux](https://github.com/tmux/tmux/wiki) to do this job  
+so that you can run and see all the commands output in a single terminal window
+
 ## For cups
 just install `devterm-thermal-printer-cups`  
 ``` sudo apt install devterm-thermal-printer-cups```