Bill Randle wrote:
On Sat, 2008-04-26 at 11:17 -0700, Marc Perkel wrote:
Trying to do something that should be simple. Using sed to remove the
first part of a hostname but not working. I want:
abc.def.com to become def.com
I tried a lot of variations of the following but it's either greedy or
does nothing.
sed -e 's/^.*?[.]//'
Here are two options:
1) sed -e 's/^[^.]*\.//'
It has a limitation that only the first host part is removed. I.e.:
abc.def.com becomes def.com and xyz.abc.def.com becomes abc.def.com
2) sed -e 's/^.*\.\([^.]*\.[^.]*\)/\1/'
This effectively strips out everything prior to the last portion
before the last period. In essence, it reduces to the domain name.
xyz.abc.def.com becomes def.com.
-Bill
Hmm.. Might want to consider adding something to check to see if the
part after the last period is only two characters long. I.E.
www.domain.com.uk or great.spammer.com.ru
