Na página vim(1)
man:
+{command}
-c {command}
{command} will be executed after the first file has been read. {command} is interpreted as an Ex command. If the {command} contains spaces it must be enclosed in double quotes (this depends on the shell that is used). Example: Vim "+set si" main.c
Note: You can use up to 10 "+" or "-c" commands.