topic Re: awk command not working in shell script in Operating System - Linux

awk command not working in shell script

vz7r1x — Mon, 11 Mar 2013 02:38:15 GMT

I am trying to grab output from awk utility in a script and email the output but script is failing. On HP 11 platform, I trying to get the fifth field from "bdf /var" output and send myself an email if /var is 90% or more full but I have not been able to get it right.

Output is needed for second line as first line has the header, not disk info. Here is what I wrote:

#!/bin/sh
bdf /var |sed 's/%//'|awk '{if ($5 >= 90) print $0;}'|mailx -s"`hostname` -File system full" MyId@email.com
exit

And bdf output is like this:
Server> bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol7 4194304 1756256 2422400 42% /var

P.S.This thread has been moved from HP-UX>General HP-UX > languages-HP Forums Moderator

Re: awk command not working in shell script

Peter Godron — Fri, 24 Mar 2017 08:17:42 GMT

Hi,
and welcome to the forums !

You may be interested in reading:
https://community.hpe.com/t5/forums/searchpage/tab/message?q=awk+command+
Please also read:
https://community.hpe.com/t5/Community-FAQ/FAQ-Kudos/td-p/6838486 on how to reward any useful answers given to your questions.

Re: awk command not working in shell script

James R. Ferguson — Tue, 05 Dec 2006 10:42:51 GMT

Hi:

To skip the header line you could do:

# bdf /var |sed 's/%//'|awk '{if (NR>1 && $5 >= 90) print $0;}'

Regards!

...JRF...

Re: awk command not working in shell script

spex — Tue, 05 Dec 2006 10:43:20 GMT

Islam,

Here's an adaptation of a script I use to check/copy Oracle archivelogs:

#!/usr/bin/sh
typeset -i SIZE=$(bdf /var| awk '{getline; sub(/%/,""); print $5;}')
if [[ $SIZE -gt 90 ]]
then
mailx -m -s "[$(date +%m\/%d\/%y)] $(hostname) /var at 90+%!" your@email.addr
fi
exit 0

PCS

Re: awk command not working in shell script

Sandman! — Tue, 05 Dec 2006 10:46:01 GMT

how about the awk below:

# bdf /var | awk 'z[split($5,z,"%")-1]>=90' | mailx -s "FileSys > 90%" abc@xyz.com

Re: awk command not working in shell script

Arturo Galbiati — Wed, 06 Dec 2006 05:50:08 GMT

HI,
# Show mount points over PCT
bdf|awk -v PCT=90 'NR==1||substr($5,1,index($5,"%")-1)+0>=PCT'

if you do not want header remove "NR==1||".
if you want different percentage to check chnage PCT=90 as you prefer.
HTH,
Art

Re: awk command not working in shell script

vz7r1x — Wed, 06 Dec 2006 07:12:30 GMT

Thanks for great responses. I used Spex's suggestion to resolve the issue.