Help for File Modification

Shell Programming and Scripting
1

Hi All,

I have a file disk_space.log.
cat disk_space.log

94% /
32% /boot
38% /mnt/data
100% /media/CDROM

I want the output, like
cat disk_space.log

94% /
100% /media/CDROM

That means print the line those are grater-than 90%. And rest of the line is remove from file.
I have a script but that is not working properly.

cat disk_space.log | awk -F"%" '{print $1}' | awk '$1>90'

Please Help me.

Thanks in advance

2

Should work:

awk -v FS="%" '$1>90 {print}' disk_space.log
3 
awk '$1+0>90' infile

--ahamed