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Domain Expiration Check Shell Script

I’ve already written about a shell script to check / monitor domain renew / expiration date here. Now I’ve modified matt’s domain-check script to support additional C/TLDs .in, .biz, .org and .info domains. I’ve also added 5 seconds delay to avoid whois server rejecting query. This script checks to see if a domain has expired. It can be run in interactive and batch mode, and provides facilities to alarm if a domain is about to expire in advance.

Sample usage

Display expiration date and registrar for theos.in domain:
domain-check-2 -d {domain-name}

$ domain-check-2 -d theos.in

Domain                              Registrar         Status   Expires     Days Left
----------------------------------- ----------------- -------- ----------- ---------
theos.in                            et4India (R7-AFIN Valid    28-Oct-2009   799  

You can also get an email if theos.in going to expire in 30 days
$ domain-check-2 -a -d theos.in -q -x 30 -e vivek@nixcraft.com

However most killer feature is you can read list of domain names from a file such as mydomains.txt (list each domain on a new line):
$ domain-check-2 -a -f mydomains.txt -q -x 30 -e vivek@nixcraft.com
$ domain-check-2 -f mydomains.txt


Domain                              Registrar         Status   Expires     Days Left
----------------------------------- ----------------- -------- ----------- ---------
theos.in                            et4India (R7-AFIN Valid    28-Oct-2009   799
nixcraft.org                        oDaddy.com, Inc.  Valid    13-Aug-2009   723
vivekgite.com                       MONIKER ONLINE SE Valid    18-aug-2010   1093
cyberciti.biz                                         Valid    30-Jun-2009   679
nixcraft.info                       oDaddy.com Inc. ( Valid    26-Jun-2009   675
nixcraft.net                        GODADDY.COM, INC. Valid    11-dec-2009   843  


=> Download modified domain-check-2 script here.

Quick installation

Use wget command to download and install domain-check script:
$ wget http://www.cyberciti.biz/files/scripts/domain-check-2.txt
$ mv domain-check-2.txt domain-check
$ chmod +x domain-check
$ ./domain-check -d vivekgite.com

Make sure your run domain-check script using a cron job.

How to stop a Linux job after a certain time

This article explains – controlling the duration of scheduled jobs (at and cron jobs) under Linux using nice shell script tricks:

Say you need to debug a pesky problem by running some traces for 30 minutes at midnight, or you would just like to use your Linux system as an alarm clock. This tip helps you stop jobs, such as those started with the cron and at capabilities, after the jobs have run for a certain time, or when some other criteria are met.

Linux tip: Controlling the duration of scheduled jobs

Shell script to check / monitor domain renew / expiration date

Update: Check out new improved domain-check script.

Forgetting to renew your domain name can happen to all of us. According to this post:
Reports are coming in from Germany that Google.de was down for many hours yesterday, and has now gone live again. We’re trying to confirm the reason, but it appears to be because Google forgot to renew the Google.de domain name..

I am going to share my little (read as dirty) shell script. It monitors and lists domain expiration date.

whois command line client for the whois directory service. It provides domain whois information. To find out nixcraft.com domain information you need to type:
$ whois nixcraft.com

Find domain expiration date

To get expiration date use grep command:
$ whois nixcraft.com | egrep -i 'Expiration|Expires on'

 Expiration Date: 10-may-2009
NOTICE: The expiration date displayed in this record is the date the
currently set to expire. This date does not necessarily reflect the expiration
view the registrar's reported date of expiration for this registration.
      Expires on: 10-May-09

Here is my script:

# Domain name list - add your domainname here
DOM="theos.in cricketnow.in nixcraft.com nixcraft.org nixcraft.biz nixcraft.net nixcraft.info cyberciti.biz cyberciti.org gite.in nixcraft.in"
for d in $DOM
  echo -n "$d - "
  whois $d | egrep -i 'Expiration|Expires on' | head -1
  # If you need list..
  # whois $d | egrep -i 'Expiration|Expires on' | head -1 >> /tmp/domain.date
  echo ""
# [ -f /tmp/domain.date ] && mail -s 'Domain renew / expiration date' you@yahoo.com < /tmp/domain.date || :


theos.in - Expiration Date:28-Oct-2007 13:01:58 UTC
cricketnow.in - Expiration Date:29-Jul-2008 09:17:56 UTC
nixcraft.com -    Expiration Date: 10-may-2009
nixcraft.org - Expiration Date:13-Aug-2007 14:58:30 UTC
nixcraft.biz - Domain Expiration Date:                      Fri Jun 01 23:59:59 GMT 2007
nixcraft.net -    Expiration Date: 11-dec-2007
nixcraft.info - Expiration Date:26-Jun-2007 11:05:13 UTC
cyberciti.biz - Domain Expiration Date:                      Tue Jun 30 23:59:59 GMT 2009
cyberciti.org - Expiration Date:25-May-2007 11:20:40 UTC
gite.in - Expiration Date:14-Sep-2007 06:47:36 UTC
nixcraft.in - Expiration Date:02-Feb-2008 05:33:08 UTC

Install a script and run on weekly / monthly basis via Linux/UNIX Cron facility.