General Questions

Ok, so the downloading a file via the hidden exec page is pretty straight foward.  but I'm a little uncertain as to how to upload that modified file, specifically how to get it back to the location I downloaded it from.   There is a field for the file I want to upload, easy........but where do I put the location?  This may be a no brainer, but I'm wanting to be certain before I do it.   

Basically I've made a slight modification to the 'logout' button in the /usr/local/captiveportal/index.php file.   

thanks ya'll

nevermind.....got it.    I realized that the exec page uploads it to /tmp  folder.  then i can move it with the command line......