You can set it as a cron job, are you familiar with VI it's a text editor ?
Anyway here goes
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 firstname.lastname@example.org
Save the file and you should get a confirmation
crontab: installing new crontab