grep specific number after string

Question

So I'm currently trying to make a script for gptfdisk and I need to get the "Partition unique GUID". This is the output I get:

Partition GUID code: 48465300-0000-11AA-AA11-00306543ECAC (Apple HFS/HFS+)
Partition unique GUID: 677EDC3D-8AB1-458F-B849-F8B609339391
First sector: 352676 (at 1.3 GiB)
Last sector: 3899397 (at 14.9 GiB)
Partition size: 3546722 sectors (13.5 GiB)
Attribute flags: 0003000000000000
Partition name: 'Data'

In the end I want to have just the

677EDC3D-8AB1-458F-B849-F8B609339391

How would I accomplish this?

@BenjaminW. I've already seen that post, though the answer does not quite accomplish what I need. — TheOnlyGermanGuy, May 16 '16 at 01:19
How does `grep -oP '(?<=^Partition unique GUID: ).*' infile` not work? — Benjamin W., May 16 '16 at 01:19
Then how does the first suggestion in the accepted answer, `grep 'Partition unique GUID:' infile | sed 's/^.*: //'`, not work? — Benjamin W., May 16 '16 at 01:29
@BenjaminW. I get the number, though I also get an unwanted part before it. It looks like this: https://ghostbin.com/paste/eovoq — TheOnlyGermanGuy, May 16 '16 at 01:34
That's probably output to standard error and has nothing to do with grep. Try suppressing it by replacing `gptfdisk /dev/rdisk0s1` by `gptfdisk /dev/rdisk0s1 2> /dev/null`, i.e., redirecting error output to `/dev/null`. — Benjamin W., May 16 '16 at 01:41
Or alternatively, pipe both stderr and stdout to grep by using `gptfdisk /dev/rdisk0s1 |&`. — Benjamin W., May 16 '16 at 01:43
Now if you want to be super awesome, you can accept the duplicate as such. — Benjamin W., May 16 '16 at 01:48

sjsam · Answer 1 · 2016-05-16T02:36:43.343

1

This will do :

sed -n '/unique GUID/{s/.* GUID: //p}' your_file

or if you wish to pipe some output do :

command | sed -n '/unique GUID/{s/.* GUID: //p}'

edited May 16 '16 at 02:36

answered May 16 '16 at 02:20

sjsam

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score 0 · Answer 2 · answered May 16 '16 at 03:38

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grep wih Perl regex:

grep -oP '(?<=unique GUID: ).*' file
677EDC3D-8AB1-458F-B849-F8B609339391

Or using two grep operation:

grep 'unique GUID:' file | grep -o '[^[:blank:]]*$'
677EDC3D-8AB1-458F-B849-F8B609339391

answered May 16 '16 at 03:38

Jahid

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score 0 · Answer 3 · answered May 16 '16 at 07:05

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grep with awk -

cat file | grep 'Partition unique GUID' | awk -F: '{print $2}'

answered May 16 '16 at 07:05

avivb

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grep specific number after string

3 Answers3