[Chester LUG] Help with a bash script

[David Holden]

Hi Stuart,

 VERY quick hack but it may work, the grep allows # comments


IFS=' ';

datfile="1.dat"

(
cat $datfile | sort | grep -v \# | while read data
do
  data_array=(`echo "$data"`)
  col1=${data_array[0]}
  echo -n "$col1 "
  cat $datfile  | sort  | grep "$col1" | awk '{print $2}' | tr '\n' ' '
  echo ""
done
) | sort | uniq


Dave.


On 18/10/10 17:44, Stuart Burns wrote:
> Hi everyone,
> 
> I am hoping someone can help me a bit here. I am creating a cript that
> deals with volume groups. However my bash skills fall short.
> 
> I have a file that looks like this
> 
> Vg955-01 /dev/diska1
> Vg955-01 /dev/diska2
> Vg978-01 /dev/disk45
> Vg978-04 /dev/disk13
> 
> You get the picture.
> 
> Now what I am trying to do is get all the vg parts followed by the
> constituent disks. Ie above should look like:
> 
> Vg955-01 /dev/disk1a /dev/diska2
> Vg978-01 /dev/disk45
> Vg978-04 /dev/disk13
> 
> I cant really think of an easy way to do it without resorting to perl.
> Can anyone help?
> 
> Regards
> 
> Stu
> 
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> 

-- 
Dr David Holden. (dh at iucr.org)