Unique/No Duplicated values in Shell Array Linux

Question

I need to make a new array or just delete from the actual array the duplicate elements,

#The NTP IPS are the following ones:
#10.30.10.0, 10.30.10.0, 10.30.20.0, 10.30.20.0, 10.30.20.0

#!/bin/bash
ips_networks=()
for ip in ${ips_for_ntp[@]};do
    ips_networks+=${ip%.*}.0
done

So I'll get ips_networks with duplicate ips, but I need just one of each ip into another array or the same, I have try with awk, set -A (Is not working on my linux), cut but with no luck, is there anyway to make an unique value array?

It is declare -A for an associative array not set -A and it needs bash 4+. — Etan Reisner
– Etan Reisner, Commented Apr 22, 2015 at 13:04

Vadim Landa · Accepted Answer · 2015-04-22 13:10:00Z

2

ips="10.30.10.0, 10.30.10.0, 10.30.20.0, 10.30.20.0, 10.30.20.0"
unique_ips=`echo $ips | sed -e "s/\s\\+//g" | sed -e "s/,/\\n/g"| sort | uniq`
echo $unique_ips #10.30.10.0 10.30.20.0

answered Apr 22, 2015 at 13:10

Vadim Landa

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1 Comment

Ivor Over a year ago

Thanks, it works but using the comma to separate, the thing is this ips are already in the array "ips_networks" so if make a echo it will be like this: 10.30.10.010.30.10.010.30.20.010.30.20.010.30.20.0

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