Ping scanning without nmap

prefix="10.0.0" && for i in `seq 25`; do ping -c 1 $prefix.$i &> /dev/null && echo "Answer from: $prefix.$i" ; done
Not really an easier solution. But an example using && for (if last command returned 0). You can use || for (if last command returned other than 0)..
Sample Output
Answer from: 10.0.0.1
Answer from: 10.0.0.2
Answer from: 10.0.0.4
Answer from: 10.0.0.5
Answer from: 10.0.0.6

-2
By: xeor
2010-04-07 17:17:21

4 Alternatives + Submit Alt

  • Usefull for when you don't have nmap and need to find a missing host. Pings all addresses from 10.1.1.1 to 10.1.1.254, modify for your subnet. Timeout set to 1 sec for speed, if running over a slow connection you should raise that to avoid missing replies. This will clean up the junk, leaving just the IP address: for i in {1..254}; do ping -c 1 -W 1 10.1.1.$i | grep 'from' | cut -d' ' -f 4 | tr -d ':'; done Show Sample Output


    14
    for i in {1..254}; do ping -c 1 -W 1 10.1.1.$i | grep 'from'; done
    SuperJediWombat · 2010-04-07 16:57:53 5
  • Ping sweep without NMAP


    3
    for i in `seq 1 255`; do ping -c 1 10.10.10.$i | tr \\n ' ' | awk '/1 received/ {print $2}'; done
    hemanth · 2009-08-22 09:34:27 11
  • Waits for all pings to complete and returns ip with mac address


    3
    (prefix="10.59.21" && for i in `seq 254`; do (sleep 0.5 && ping -c1 -w1 $prefix.$i &> /dev/null && arp -n | awk ' /'$prefix'.'$i' / { print $1 " " $3 } ') & done; wait)
    smoky · 2014-04-02 11:20:57 6
  • This version combines the best of the other suggestions and adds these features: 1. It scans a /16 subnet 2. It is very fast by running the ping commands in the background, running them in parallel. 3. Does not use the "-W" option as that's not available in older ping versions (I needed this for OS X 10.5)


    0
    prefix="169.254" && for i in {0..254}; do echo $prefix.$i/8; for j in {1..254}; do sh -c "ping -m 1 -c 1 -t 1 $prefix.$i.$j | grep \"icmp\" &" ; done; done
    tempelorg · 2012-07-25 12:07:15 2

What Others Think

Note that "seq" is not portable (it isn't standard) and probably works on Linux only. On BSD systems there is a similar command called "jot", which is equally non-portable, of course. Solaris and other systems have neither of these. It's also worth mentioning that some shells have built-in features that fullfill the same purpose. For example, in zsh and bash you can write "for i in {1..25}". But this is also non-standard and doesn't work with plain bourne shells, e.g. it is not supported by /bin/sh on most non-Linux systems (where /bin/sh is neither bash nor zsh).
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What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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