Fedora Core 4发布：新特色和新动向！

Fedora Core 4于本周发布，新增了不少功能和一些最新的特征，总体感觉：想尝试一下新的可能是下一代系统的
特征的用户可以尝试，但不推荐没有经过定制化的FC4用在正式工作环境中。一些新特征和动向还是需要引起注意的！
以下信息基本来自fc4的release notes，有些还未及尝试，姑且听之！

系统新特征和新的动向初步尝试：

Gnome 2.10和KDE 3.4;
不多说，用了就知道，……

一些新的办公工具：
Evince 一款集成度很高，效率蛮高的文档查阅器，可以查看PDF，PS等文档，是GNOME
项目比较新的力作。

开发程序员工具Eclipse被集成进了FC4
集成的是Eclipse 3.1 M6，和FC4自带的Java环境集成。

更加完善的SELinux target 策略包
这回target策略包包含更多的服务，更加完善和安全。
SELinux的应用日趋完善，这是RHEL4用户和其他已经使用SELinux用户
可以考虑升级的。
相信相关target的升级包也会出现在RHEL4和其他Fedora、Redhat系SELinux系统的
升级列表中。

集成虚拟机环境：Xen
Xen是一个开源的虚拟机软件项目，目前为止还没怎么研究过。
不过用于开发Fedora和制作发行版会很有用。
具体请看这里：http://fedora.redhat.com/projects/virtualization/

系统级的更新：
GCC系统升级到4,GCC 4 是GCC系统的最新版本。
最主要的改进据说是针对 native Free Java software stack的，也就是GCJ，gcc系统的java
支持部分的改进。
内核使用了较新的2.6.11

关于系统集成的JAVA环境:
FC4集成的GNU free java software stack更加完善和完整。
这个环境包括了GCC 4（GCJ）和Eclipse等。
Release Notes忠告：用户不要使用Sun提供的RPM的JDK包。
这是之前的Core3上就有的一些问题，相信随着GCJ和其他Java包的集成和完善，Free JAVA software
stack会更加和Sun的JDK不兼容。
所以这里建议用户确定使用哪个Java系统：
如果使用GCJ的，那么就用FC4自带的，不用增加什么！
用Sun或IBM等外部的，现在很多用户其实这么使用，建议把Jdk和Java环境装在/opt/下面，
并设置正确的环境。
java环境的更改至少需要使用alternatives系统来更改java程序，具体参阅我之前的alternatives的文章

这些是目前我了解到的一些情况：
还有很多的更新，具体信息请看Fefora官方ReleaseNotes。

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