topic Re: awk in Operating System - HP-UX

awk

cfeitosa — Thu, 31 May 2007 14:01:05 GMT

Hello guys.

Please I need a help with the awk command.

When I run the command:

:#/ls -al prof* | head -1 |awk '{print $9}'

I have the following:
prof.u18

How can I get only "u18" in the same line command?

Please, could someone give me a help?

Thanks,
clefeitosa

Re: awk

Ivan Krastev — Thu, 31 May 2007 14:08:46 GMT

Use another awk:

echo prof.u18 | awk -F "." '{print$2}'

regards,
ivan

Re: awk

James R. Ferguson — Thu, 31 May 2007 14:11:18 GMT

Hi:

# ls -al prof* | head -1 | awk '{split($9,a,".");print a[2]}'

...although you can eliminate the 'head' process too:

# ls -al prof* | awk '{NR==1 && split($9,a,".");print a[2]}'

Regards!

...JRF...

Re: awk

James R. Ferguson — Thu, 31 May 2007 14:16:27 GMT

Hi (again):

...and since it's the last field of the 'ls' output you want:

# # ls -al prof* | awk '{NR==1 && split($NF,a,".");print a[2]}'

...that is, why count nine fields when $NF points to the last...

Thus is you "slip" and do 'ls -als' and there are ten fields, everything still works!

Regards!

...JRF...

Re: awk

cfeitosa — Thu, 31 May 2007 14:26:53 GMT

Hi,

Thanks for all answer.
Was very useful

I'm using the following:
ls -al prof* | head -1 | awk -F "." '{print $2}'

Thanks a lot

Re: awk

Sandman! — Thu, 31 May 2007 14:27:41 GMT

# ls -al prof* | awk -F. 'NR==1 {print $NF}'

Re: awk

Dennis Handly — Thu, 31 May 2007 22:38:58 GMT

You of course can change your ls(1) to:
$ ls -a prof*

Then you only need to process the one field and don't have to count. :-)