set FQDN for hostname

[Thufir Hawat]

As best as I can tell, you must edit two files (at least on Ubuntu) to 
change the hostname result:

thufir at tleilax:~$ 
thufir at tleilax:~$ nl /etc/hosts
     1	127.0.0.1	localhost.localdomain	localhost
     2	127.0.1.1	tleilax.servebeer.com 		tleilax
     3	127.0.1.1	arrakis.vs.shawcable.net	arrakis
       
       
     4	# The following lines are desirable for IPv6 capable hosts
     5	::1     localhost ip6-localhost ip6-loopback
     6	fe00::0 ip6-localnet
     7	ff00::0 ip6-mcastprefix
     8	ff02::1 ip6-allnodes
     9	ff02::2 ip6-allrouters
thufir at tleilax:~$ 
thufir at tleilax:~$ nl /etc/hostname
     1	tleilax
thufir at tleilax:~$ 
thufir at tleilax:~$ hostname
tleilax
thufir at tleilax:~$ 


if /etc/hostname still references the old value, then the old value will 
still show up.  It seems to screw things up if /etc/hostname doesn't 
point to anything at all.

Not sure how this relates to:

http://www.linuxtopia.org/online_books/linux_system_administration/
debian_linux_guides/debian_linux_reference_guide/ch-gateway.en_009.html


I'm kinda fuzzy on the distinction between 127.0.0.1 and 127.0.1.1 -- the 
first is the loopback, but I don't really understand the purpose of the 
second.

Also, I don't recall putting anything along the lines of line 3 of /etc/
hosts, so far as it being a FQDN from my ISP.  I entered "arrakis" at 
some point, but I wonder that I'm not breaking something which depends 
upon that FQDN from ISP.




-Thufir