From: Derek Smith <derekbellnersmith@...>
Date: 2009-12-23T13:12:11+09:00
Subject: awk print $4 in ruby

Hi All,

I had played in Ruby a while and could not get this to work.

df -m
Filesystem             1M-blocks Used Avail Capacity  Mounted on
/dev/concat/v109-v112a      7931 2619  4677    36%    /

[root@vr /usr/local/vrep/OS_scripts]# df -k |awk '{print $4}'
Avail
4789776

dfstr = Array.new
dfstr << %x(df -m)
dfstr.each do |line|
    puts line if line =~ /(\d+)%/
end

Since its one line, it of course prints it all.
I then tried:

dfstr.each do |line|
    puts line.split[3]
end

And it only prints "Avail"

I then tried:

puts dfstr.scan(/Avail.*/)

and

puts dfstr.split(/\d+/)[3]

with NO success.

Goal is to get certain data columns such as Used Avail Capacity.

thank you!
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