Question

I’ve never actually had an instance where this was required, but here I am…

What I’ve (unfortunately) got is an output of netstat -nr (almost 6000 individual static routes).

I need to take that file, and eventually translate each line into a new ‘ip route add’ command once I’ve got this working.

Here’s my failcode (echos at the bottom are for testing -> I’d want to substitute them for ip route add once this works):

num=`cat $logfile | wc -l`
echo $num
echo " "
for ((i=0; i<=$num; i++))
do

dst=$(awk '{print$1}' $logfile)
gw=$(awk '{print$2}' $logfile)
mask=$(awk '{print$3}' $logfile)
echo $dst
echo $gw
echo $mask
echo " "
done

The output, instead of looking like:
Destination Gateway Netmask
looks like:

Destination Destination Destination Destination

Gateway Gateway Gateway Gateway

Netmask Netmask Netmask Netmask

How do I make it so that each time it runs, each output is a single DST/GW/netmask that I can feed into a command?

Thanks!

Answer 1

The answer lies in AWK:

awk '{print "echo",$1,$2,$3}' $logfile | sh -x

Now replace echo with whatever command you need to run