I have the result in below command. They are capacity of drives I want to compare to a threshold value. So I want to compare each line to a specific value. If greater then some condition follows.
df -kP | awk '{print $5}'| sed 's/%//g'|sed -n '1!p' Output of this command is like this :
36 0 19 36 36 Just do it all in awk:
df -kP | awk 'NR > 1 { gsub("%","",$5); if (0 + $5 > 90) { system("echo " $6 " is too high") }}' Here we're manipulating $5 as you were before, but using gsub() to strip off the % sign, NR > 1 to take care of the sed, and after forcing $5 to be seen as integer, we compare it to a magic value of 90; if true, then we call out a system command (echo).
file_usage=$( df -kP | awk '{print $5}'| sed 's/%//g'|sed -n '1!p')