1. Select the session window 
right mouse button to select 2 to send a command to all sessions managed batch 
3 batch operation management can not be interactive command vi, vim, but can sed, cat, echo.
4. Small quantities of dozens of servers managed by CRT, with a number of more saltstack and other management tools.
Reproduced in: https: //blog.51cto.com/13932861/2409821