How to schedule an automated job

macaldwell · 05-28-2004, 05:39 AM

Hi All,

I am kind of new to this. I am running Fedora Core 1 and would like to run a cron job to email me my IP address every so often since I am using DHCP and want to log into my machine remotely. I am not sure what a script like this would look like. Can someone please help me?

Thanks

Demonbane · 05-28-2004, 05:59 AM

You can do something like:

Code:

/sbin/ifconfig | sendmail email@address

but IMO there's a better alternative, go to http://www.afraid.org and use their dynamic DNS service(its free), even if you don't have your own domain they allow you to use subdomains from a list of public domains, and they have scripts you can run periodly to refresh your ip address.

macaldwell · 05-28-2004, 11:07 AM

Hi all here is what happend when I tried that, I just recently upgraded to Fedora Core 2.

[root@localhost mcaldwell]# /sbin/ifconfig | sendmail macaldwell@cinci.rr.com
bash: sendmail: command not found
[root@localhost mcaldwell]#

Any other suggestions? I use dyndns.org for a free domain and not sure if they have scripts you can setup or not

Thanks for your help

Demonbane · 05-28-2004, 11:26 AM

try use absolution path to the commands
like /usr/sbin/sendmail or wherever it is

Pete M · 05-28-2004, 11:58 AM

macaldwell

Try this, sustitute ? with your own setting

/sbin/ifconfig eth? | grep 'inet addr:'| mail macaldwell@cinci.rr.com

Pete

macaldwell · 05-28-2004, 05:54 PM

Hey Pete and everyone else,

When I did what you had suggested it said something to the fact of no message no subject hope thats ok. Does this make sense? And my other question is this supposed to go in the cron job? or run this in shell?

Thanks for the help

Pete M · 05-28-2004, 06:34 PM

macaldwell

Just tried it again 3 times using different email addresses, one to my hotmail account and it works everytime

Try a simple version

Code:

/sbin/ifconfig | mail macaldwell@cinci.rr.com

Pete

macaldwell · 05-29-2004, 08:02 AM

Pete,

I got a question, I did get this to work and sent it to my yahoo address. My question is is there something I can add to the script that will automatically do that say every 2 hours or so?

Pete M · 05-29-2004, 02:07 PM

macaldwell

You can set it as a cron job, are you familiar with VI it's a text editor ?

Anyway here goes

Code:

$ crontab -e

This should open a text editor showing a list of cron jobs or a blank page if you don't have any existing jobs

Enter the following text

0 0,2,4,6,8,10,12,14,16,18,20,22 * * * /sbin/ifconfig | mail macaldwell@cinci.rr.com

Save the file and you should get a confirmation
crontab: installing new crontab

Pete