I know I can use
df to get a summary of disk usage right now.
I can use
du to break down into the detail of how the disk is being used.
The problem is I can only see this information for today.
If I wanted to map a trend I would have to write a script that takes the output of those commands and writes it to a file / log. Which I could later analyse. I was wondering if there is any tool or programs that can do this, that are already included in most Linux distros. Do I have to look at a more heavy weight monitoring solution.