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Use of awk/sed to filter out fdisk output

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# 8  
Old 04-28-2014
Thanks a ton Ravinder .. Smilie

---------- Post updated at 10:43 AM ---------- Previous update was at 09:52 AM ----------

Hi Ravinder,

The combination of awk and fdisk is working absolutely fine on RedHat machines.
I have tried same commands on SUSE linus for which i got below output :
Code:
fdisk -l | awk -F":|," '/Disk/ {a=$1}; /heads/ {b=$1;} END{print a OFS b}'
Disk identifier 255 heads

Code:
 
fdisk -l | awk -F":|," '/Disk/ {a=$1}; /heads/ {c=$2;} END{print a OFS c}'
Disk identifier  63 sectors/track

as you can see this is because there are two lines or patterns which starts with 'Disk' :
Code:
 
fdisk -l
Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000367ba
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1         191     1534176   82  Linux swap / Solaris
/dev/sda2   *         192        5152    39849232+  83  Linux

Could you asist how we can take Disk /dev/sda part rather than Disk identifier.
# 9  
Old 04-28-2014
Hello Omkar,

Could you please try the following.

Code:
fdisk -l |  awk -F":|,"  '/Disk \/.*/ {a=$1}; /heads/ {c=$2;} END{print a OFS c}'


Thanks.
R. Singh
# 10  
Old 04-29-2014
Excellent Smilie. Please find the below output from SUSE linux and RedHat Linux machines :
Code:
 
VM172016001141:~ # fdisk -l |  awk -F":|,"  '/Disk \/.*/ {a=$1}; /heads/ {c=$2;} END{print a OFS c}'
Disk /dev/sda  63 sectors/track
VM172016001141:~ # fdisk -l |  awk -F":|,"  '/Disk \/.*/ {a=$1}; /heads/ {b=$1;} END{print a OFS b}'
Disk /dev/sda 255 heads

Thnaks a ton Rakesh for your guidance and help...It will be great if you can provide me some link/pdf so that i can increase my knowledge on awk or sed .
Thanks a gain Smilie
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