Hi Folks,

I have a loop that goes through an array and the output is funky.

sample:
array=( 19.239.211.30 )
for i in "${array[@]}"
do
echo $i
iperf -c $i -P 10 -x CSV -f b -t 50 | awk 'END{print '$i',$6}' >> $file
done

Output:
19.239.211.30
19.2390.2110.3 8746886

seems that when the $i after the awk is printed something happens to it.

Any ideas?

Thanks.

When you use '$i" the shell is interpreting it as a literal $i and not the variable.

Try using "" instead of ''

--C

Hi, thanks for the response.

When I try with "$i" i get this

array=( 19.239.211.30 )
for i in "${array[@]}"
do
echo $i
iperf -c $i -P 10 -x CSV -f b -t 50 | awk 'END{print "$i",$6}' >> $file
done


Output:
19.239.211.30

$i 9060072

so it looks like it prints what is in the " " exactly how it appears.

Thanks.

Answered my own question:

replace '$i' with ”‘${i}’” = win

1 members found this post helpful.

Or you could negate the whole issue of guessing which quotes to use and pass the value to awk correctly:
Few things though:

1. I am guessing you will eventually fill the array as with one item the loop is pointless

2. If all you want to do is display the value, why do you need anymore than the simple echo you have already used?

1 members found this post helpful.

Hi,

Thanks for your reply.

Yes, the array will be filled up, I was just testing one for the sake of time. the end goal is to generate a list that looks like this:

19.232.211.30 8526965
19.232.235.30 8957593
19.232.243.30 8929368
19.232.219.30 11068447

Thanks again,

Please use ***[code][/code]*** tags around your code and data, to preserve the original formatting and to improve readability. Do not use quote tags, bolding, colors, "start/end" lines, or other creative techniques. Thanks.


Instead of awk, I recommend cut, which is lighter.

I'm guessing here that the output is space-delimited. Change the -d setting as necessary. (It usually helps to include a sample of the input text when you post, along with the desired output and the code you're using.)

Another option is to use the read built-in, and an array.

Remember that shell arrays are zero-indexed, so you have to subtract one.

How can I use array variables?
http://mywiki.wooledge.org/BashFAQ/005/

How do I do string manipulations in bash?
http://mywiki.wooledge.org/BashFAQ/100

Hi,

Thanks for the reply and the helpful advice. Next time I will send a more complete example with the desired output.

Again thanks for the help.