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
