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After that the development works entirely differently, because Ubuntu Linux depends on many unrelated teams of developers working together on some specific piece of software Those teams have no relationship with Ubuntu or Canonical They can be as disparate as the GNOME team (developers of the GNOME desktop environment used by Ubuntu), Mozilla (maintainers of the Firefox web browser), and Oracle (home of the OpenOfficeorg project) Canonical, the company behind Ubuntu, can t enforce a release schedule for all those projects So, as the launch date approaches, Ubuntu enters a feature freeze state All packages are updated to the latest stable version and bundled together to test compatibility Most problems are fixed, and the product is released right on schedule This means that sometimes, if a team is delayed, the price of timely release is that the latest functionality of a certain product will not be included.

That is a shame, sure, but then again, with a release cycle of just six months, the updated functionality will be available to Ubuntu Linux users almost immediately when it s ready And upgrades, like Ubuntu itself, are completely free of charge and easy to apply as well..

One of the oldest ways to resolve host names to IP addresses (and vice versa) is to use the /etc/hosts file. It s rather primitive because the file has to be maintained on every single host where you need it, and no synchronization is established between hosts. But it s also a very efficient way to supply information that needs to be available locally. Using the /etc/hosts file makes resolving names faster and reduces Internet traffic, and you can use it to add any host names that need to be available only locally. Listing 8-10 shows the contents of this file as it is created after a default installation of Ubuntu Server. Listing 8-10. Example of the /etc/hosts File root@ZNA:~# cat /etc/hosts 127.0.0.1 localhost 192.168.1.33 ZNA.lan ZNA # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts root@ZNA:~# As you can see, the contents of this file are rather simple. First, you specify the IP address of the host, which can be an IPv4 or an IPv6 address. Next, the fully qualified host name of the host is specified. This is the name of the host itself, followed by its DNS suffix. Last, the short

Note It has become customary that Ubuntu releases are named after animals, preceded by an adjective that

a numeric expression (either a number column or some expression with a numeric result, such as Price * Quantity). The arguments to MAX and MIN can be numeric, text, or date types. For text types, the order is alphabetical. For dates, the order is chronological. For example, MIN(LastName) would return the first value of LastName alphabetically. It is possible to combine several aggregate functions in one query. For example, Listing 8-15 shows how to find the maximum, minimum, and average values for Handicap. The AS clause after each function is just saying, Call the resulting column by this name. Without such a label, it can be quite hard to remember which order you are expecting the numbers. Figure 8-2 shows some typical output.

suggests the philosophy behind the particular version. At the time of writing, for example, the latest releases were Jaunty Jackalope, Karmic Koala, and Lucid Lynx. The OS also uses a version number that references the year and month of the update. So 10.04 means 2010, April release.

host name is used. Alternatively, you can just provide the IP address followed by the name of the host you want to add, such as in the following line: 192.168.1.180 RNA

Make features available when they are ready. Have a state-of-the-art OS release every six months. This is such a common-sense approach! Too bad Microsoft will never be able to use it with Windows. Do you think they could convince anybody to buy a new version of Windows every six months