A penetration tester wants to use the following Bash script to identify active servers on a network:
1 network_addr='192.168.1'
2 for h in {1..254}; do
3 ping -c 1 -W 1 $network_addr.$h /dev/null
4 if [ $? -eq 0 ]; then
5 echo 'Host $h is up'
6 else
7 echo 'Host $h is down'
8 fi
9 done
Which of the following should the tester do to modify the script?

Question

A penetration tester wants to use the following Bash script to identify active servers on a network:

1 network_addr='192.168.1'

2 for h in {1..254}; do

3 ping -c 1 -W 1 $network_addr.$h > /dev/null

4 if [ $? -eq 0 ]; then

5 echo 'Host $h is up'

6 else

7 echo 'Host $h is down'

8 fi

9 done

Which of the following should the tester do to modify the script?

Priyantha Perea · Accepted Answer

Use seq on the loop on line 2.

Priyantha Perea · Answer

Change the condition on line 4.

Priyantha Perea · Answer

Add 2>&1 at the end of line 3.

Priyantha Perea · Answer

Replace $h with ${h} on line 3.

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