Shell Programming and Scripting

Hi All,
I need to add up values given by the grep command.Following is the sample:

Code:

[root@iqmango ~]# grep cores /proc/cpuinfo
cpu cores       : 4
cpu cores       : 4
cpu cores       : 4
cpu cores       : 4
cpu cores       : 4
cpu cores       : 4
cpu cores       : 4
cpu cores       : 4

I can do this using a for loop , but wanted to know if this could be done in one line to make the code elegant, maybe using awk or some other tool.

Thanks!
nua7

If you want to know the no of occurence of cores you can pipe your grep comand to wc -l

ie grep cores /proc/cpuinfo |wc -l



Cheers,
Santy

Try This...
grep cores /proc/cpuinfo | awk '{print $4}' | nawk '{sum +=$1} END{print sum}'

Thnx,
Christine Ida

This won;t work , because I need to count the total number of cores , including all processors.

Code:

[root@iqmango ~]# grep cores /proc/cpuinfo |wc -l
8

This gives me the total number of processors but not cores.For cores I need to add up the lines as mentioned in the fiorst post.

Hope the confusion is clear.

Thanks!
nua7

Actually, that's not going to give you the right number, because there is an entry in /proc/cpuinfo for each core. So if you have 2 4-core processors, even though there will be 8 entries in /proc/cpuinfo, each will report that their processor contains 4 cores, and you will get a result of 32 when in fact you only have 8 cores.

santysham's solution will actually give you the correct result, perhaps in a not very obvious way. You can abbreviate it to grep -c cores /proc/cpuinfo.

Thank you all for the replies!

I had to count the total number of cores for the server.

Christineida's solution works perfect for me..! Thanks a lot christineida!

Sure, it works, but the result is wrong! ;-)