how to edit name server/ rcon password?

Edit /csgo/cfg/server.cfg and add/edit following lines:

rcon_password "96be0a4ae3c01bd7489fd8de69ec4ceb"
hostname "My new server"

im dont have server.cfg

Please double check in directory /csgo/cfg there should be a file called server.cfg

No, I do not have

Feel free to create server.cfg file in /csgo/cfg directory

Full guide here: https://lemehost.com/forum/topic/4448/basic+server...