On Sun, 31 Oct 2010 20:17:05 -0600, Bob Proulx <b...@proulx.com> wrote:
[...] > I assume the laptop gets a dynamic address from DHCP and doesn't > register a dynamic DNS address for it? My understanding of these terms is very limited, but I think so. > If you only need this for ssh then you can add an entry in your ssh > configuration file ~/.ssh/config similar to this one: > Host foo.example.com > Hostname 192.0.32.10 > HostKeyAlias foo.example.com > And if you don't want to type in the full name you can set up a short > hostname for it too. > Host foo > Hostname 192.0.32.10 > HostKeyAlias foo.example.com >> As per the man page, /etc/hosts has: >> IP_address canonical_hostname [aliases] > That means something like this: > 192.0.32.10 foo.example.com foo bar > The IP address is first on the line. The next entry is taken as the > fully qualified domain name when converting from IP address to name. > Any additional entries on the line are taken as additional aliases. > Note that the FQDN (fully qualified domain name) does not mean the > canonical name. I know the man page says that but times have changed. >> To get the canonical_hostname I thought I'd easily get it by typing >> "dnshostname" when logged into the remote laptop, but that returns >> nothing, and "domainname" returns '(none)'. How should this >> canonical_hostname be specified in this case? > Normally you would look up the IP address in DNS and see what PTR > record is returned for it. That name is typically the canonical > hostname. > $ host quantz.debian.org quantz.debian.org has address 206.12.19.122 > $ host 206.12.19.122 122.19.12.206.in-addr.arpa domain name pointer > quantz.debian.org. > So here we would say that the canonical name is quantz.debian.org but > it does also have other names. > $ host qa.debian.org qa.debian.org has address 206.12.19.122 > But many hosts don't really have canonical hostnames anymore. Not > since the addition of dual homed or multi-networked hosts with > potentially several IP addresses possibly on each network interface > not to mention VPN addresses. Because then it is possible for a host > to have multiple names in the reverse DNS for the different IP > addresses. So with that in mind a host really doesn't have one single > canonical name in many cases. But when it does that is what we call > it. Thanks very much!! This has been very instructive. -- Seb -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87pqup7kd2....@kolob.sebmags.homelinux.org
