Shell Programming and Scripting

#!/bin/bash

DISCOVERY (){
nmap -v -p 139,445 --script=smb-os-discovery $address |grep -v "smb-os-discovery" | grep -v "OS CPE" | grep -v "Computer name" | grep -v "NetBI$
}
PORTS (){
nmap -sT --top-ports 20 $address
}

for address in $(cat activeips.txt);do
DISCOVERY
PORTS
done

#!/bin/bash

DISCOVERY ()
{
   addr="${1}"
   nmap -v -p 139,445 --script=smb-os-discovery "${addr}" |grep -v 'smb-os-discovery' | grep -v 'OS CPE' | grep -v 'Computer name' | grep -v 'NetBI'
}
PORTS ()
{
  addr="${1}"
  nmap -sT --top-ports 20 "${addr}"
}

while read address junk
do
   DISCOVERY "${address}"
   PORTS "${address}"
done < activeips.txt

for address in $(cat activeips.txt);
do
   DISCOVERY "${address}"
   PORTS "${address}"
done

so outputting to activeips.txt like you have as the last line is no quite correct

10.0.0.13
10.0.0.16
10.0.0.22
10.0.0.17
10.0.0.19
10.0.0.20
10.0.0.12
10.0.0.11
10.0.0.15
10.0.0.24
10.0.0.63
10.0.0.62
10.0.0.80
10.0.0.101
10.0.0.103
10.0.0.109
10.0.0.112
10.0.0.117
10.0.0.110