Shell Programming and Scripting

36%/
55%/var
82%/tmp
74%/opt

---------------------------------
Disk%    Mount
---------------------------------
36%      /
55%      var
82%      tmp
74%      opt
----------------------------------------

awk 'BEGIN {print "---------------------------------";print "Disk% Mount";print "---------------------------------"} {print} END {print "---------------------------------"}' file

awk 'BEGIN {
	print "---------------------------------"
	print "Disk% Mount"
	print "---------------------------------"}
	{print} 
	END {
	print "---------------------------------"}' file

sed 's/^\([0-9]\{1,2\}%\)\/$/\1 \//; s/^\([0-9]\{1,2\}%\)\/\([a-z]*\)$/\1 \2/' file

awk -F '/' '$2=="" {$2 = "/"} {print $1 "\t" $2}' file