(Solved) : Check Command Df Tells Much Disc Space Avaliable Mounted Devices Write Shell Script Disksh Q34867854 . . . .

Check out the command df that tells you how much disc space isavaliable on all the mounted devices. Write a shell script disk.sh(1.5%)
that finds the line that corresponds to sda1 (HINT: read the manpage of grep) (0.5%),
extracts the percentage (HINT: check out awk and cut (0.5%),
and returns a message if it exceeds a number that was given as anoption. Check initially that the option exists (0.5%).

Consider that you want to rename all files of a given type (e.g.file extension) to a different filetype. For example, you want tochange the file extension of all txt files to text. Write a shellscript