Commands using whois (16)

  • Returns nothing if the domain exists and 'No match for domain.com' otherwise.


    7
    whois domainnametocheck.com | grep match
    Timothee · 2009-08-11 13:33:25 17
  • A quick alias to check if a domain is already registered or if it's available for purchase. Show Sample Output


    5
    function canibuy { whois "$1" 2>/dev/null | grep -q 'Registrant' && echo "taken" || echo "available" }
    tyzbit · 2023-06-21 15:01:25 183

  • 4
    ASN=32934; for s in $(whois -H -h riswhois.ripe.net -- -F -K -i $ASN | grep -v "^$" | grep -v "^%" | awk '{ print $2 }' ); do echo " blocking $s"; sudo iptables -A INPUT -s $s -j REJECT &> /dev/null || sudo ip6tables -A INPUT -s $s -j REJECT; done
    koppi · 2016-04-08 11:30:12 61
  • Create a text file called domainlist.txt with a domain per line, then run the command above. All registries are a little different, so play around with the command. Should produce a list of domains and their expirations date. I am responsible for my companies domains and have a dozen or so myself, so this is a quick check if I overlooked any.


    3
    cat domainlist.txt | while read line; do echo -ne $line; whois $line | grep Expiration ; done | sed 's:Expiration Date::'
    netsaint · 2010-05-02 06:49:09 7
  • Useful if you f.i. want to block/allow all connections from a certain provider which uses successive netnames for his ip blocks. In this example I used the german Deutsche Telekom which has DTAG-DIAL followed by a number as netname for the dial in pools. There are - as always ;) - different ways to do this. If you have seq available you can use net=DTAG-DIAL ; for i in `seq 1 30`; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done or without seq you can use bash brace expansion net=DTAG-DIAL ; for i in {1..30}; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done or if you like while better than for use something like net=DTAG-DIAL ; i=1 ; while true ; do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; test $i = 30 && break ; i=$(expr $i + 1) ; done and so on. Show Sample Output


    2
    net=DTAG-DIAL ; for (( i=1; i<30; i++ )); do whois -h whois.ripe.net $net$i | grep '^inetnum:' | sed "s;^.*:;$net$i;" ; done
    drizzt · 2009-08-01 05:28:19 4
  • Change the $domain variable to whichever domain you wish to query. Works with the majority of whois info; for some that won't, you may have to compromise: domain=google.com; for a in $(whois $domain | grep "Domain servers in listed order:" --after 3 | grep -v "Domain servers in listed order:"); do echo ">>> Nameservers for $domain from $a Note that this doesn't work as well as the first one; if they have more than 3 nameservers, it won't hit them all. As the summary states, this can be useful for making sure the whois nameservers for a domain match the nameserver records (NS records) from the nameservers themselves. Show Sample Output


    2
    domain=google.com; for ns in $(whois $domain | awk -F: '/Name Server/{print $2}'); do echo ">>> Nameservers for $domain from $a <<<"; dig @$ns $domain ns +short; echo; done;
    laebshade · 2011-05-08 04:46:34 5

  • 1
    whois commandlinefu.com | grep -E '^\s{3}'
    ca9lar · 2019-04-09 21:09:30 76

  • 0
    while read line; do pais=$(whois "$line" | grep -E '[Cc]ountry') echo -n "IP=$line Pais=$pais" && echo done <listaip
    pathcl · 2010-10-25 15:39:50 33
  • Nice neat feedback showing contact infomation for as many domains as you wish to feed it. I used a list of domains, each one on a new line as supplied by our registar, as we needed to check they were all upto date and back them up as we are updating them all.


    0
    whois -H $(cat ./list_of_domains) | awk 'BEGIN{RS=""}/Registrant/,/Registration Service Provider:/ {print} END{print "----------------\n"}'
    djsmiley2k · 2011-01-11 12:55:34 4
  • Found on https://bitcointalk.org/index.php?topic=55520.0


    0
    for i in `wget -O url|grep '<a rel="nofollow"'|grep http|sed 's|.*<a rel="nofollow" class="[^"]\+" href="[^"]*https\?://\([^/]\+\)[^"]*">[^<]\+</a>.*|\1|'`;do if test -n "$(whois $i|grep -i godaddy)";then echo $i uses GoDaddy;fi;sleep 20;done
    coinbitsdotcom · 2011-12-24 19:12:18 6

  • 0
    cat domainlist.txt | while read line; do echo -ne $line; whois $line | grep Expiration ; done | sed 's:Expiration Date::'
    jun3337 · 2013-05-13 02:55:17 8
  • Retrieves AS route prefixes for IPv4 and IPv6, aggregates the routes to the minimal set, and adds netfilter rules to reject them. Relies on two helpers: IPv4 - "aggregate" by Joe Abley (package name 'aggregate'), IPv6 - "aggregate6" by Job Snijders ( https://github.com/job/aggregate6 ) Show Sample Output


    0
    ASN=32934; for IP in 4 6; do whois -h riswhois.ripe.net \!${IP/4/g}as${ASN} | sed -n '2 p' | tr \ \\n | aggregate${IP/4/} | while read NET; do ip${IP/4/}tables -I INPUT -S ${NET} -j REJECT; done; done
    iam_TJ · 2016-05-29 09:45:34 10
  • I don't know why you would want to echo "blocking ....", but my alternative is functionally equivalent with the extra echo.


    0
    ASN=32934;whois -H -h riswhois.ripe.net -- -F -K -i $ASN|awk '/^'$ASN'/ {if ($2 ~ /::/) {a="6"} else {a=""};b="sudo ip"a"tables -A INPUT -s "$2" -j REJECT"; print " blocking "$2;system(b)}'
    AndrewM · 2016-07-22 07:48:27 14
  • Outputs multiple whois from a plain text file.


    -2
    for domain in `cat list_of_domains.txt`; do echo $domain; whois $domain >> output.txt; done
    pathcl · 2010-02-15 17:13:45 8
  • This can be used in scripts, to find out the origin of target IP etc. Show Sample Output


    -5
    x=192.168.1.1; whois $x > $x.txt
    sxiii · 2011-01-17 03:33:49 10
  • It would be nice if commandlinefu.com had a better domain name. Will they pick one of the above; We'll see. Show Sample Output


    -11
    whois cmd.fu;whois cmdfu.com|grep -i cmdfu
    axelabs · 2009-02-19 08:57:50 15

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