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Uniq entries needed...

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Super Advisor

Uniq entries needed...

Hi All,

I have the following command which returns the output like this -

wget URL|grep hostname|awk '{print $1,$3}'|/usr/bin/perl -nle 'm{"(.*?)".*?//(.*):(\d+)/} and print "$1 $2 $3"'|while read host port
do
echo check_env_$port
echo host
done

OUTPUT
Appname hostname port
Appname2 hostname port2 ...

Appnames are all unique , while hostname is not since I am grepping for single hostname(vip).
Some of the ports are not unique so I am getting the same port for 4-5 different appnames.

Within the same snippet of code I want to add a number to echo command so the its unique..
e.g. check_env_1_1234
check_env_2_1234

So for port 1234 it should increment the numbers.

If that's too hard then atleast get unique entries so that I don't get check_env_1234 not more than once which ever comes first and ignore the rest of the entries with the same port.

Thanks,
Allan.
2 REPLIES
Acclaimed Contributor Acclaimed Contributor

Re: Uniq entries needed...

Hi Allan:

One solution is to sort your output before your 'while read...' loop. Then, in the body of the loop, compare and increment a variable whose value becomes the count of the port instance.

Regards!

...JRF...
Acclaimed Contributor Acclaimed Contributor

Re: Uniq entries needed...

Hi (again) Allan:

...and I scanned right past this:

> If that's too hard then atleast get unique entries so that I don't get check_env_1234 not more than once which ever comes first and ignore the rest of the entries with the same port.

OK, so, use a 'sort -u' :

# wget ... | sort -u -k3,3 | while read ...

Regards!

...JRF...