Shell Programming and Scripting

grep ^ABC interfaces.txt > name.txt
grep "master tcp" interfaces.txt > host.txt

total_line=`wc -l name.txt`
i=1
while i < $total_line
do
   name=`head -$i name.txt | tail -1`
   host=`head -#i host.txt | tail -1 | awk '{print $4}`
   port =`head -#i host.txt | tail -1 | awk '{print $5}` 
   echo "$name $host $port"
done

awk '{print$1,$(NF-1),$NF}' RS= interfaces.txt

awk '{printf"%s",(NF==1?$1FS:$(NF-1)FS$NF RS)}' interfaces.txt