ipfw(8)list and show command now support ranges of rule numbers.
中譯: ipfw list及 show 命令支援ipfw規則編號範圍.

ipfw(8) now supports a -n flag to test the syntax of commands without actually changing anything.
中譯: ipfw 提供 -n 參數 在不變動任何狀況下,提供測試ipfw規則.

systat(1)now includes displays for IPv6 and ICMPv6 traffic.
中譯: systat 顯示包含 IPv6 和 ICMPv6 的流量

Ports/Packages Collection Infrastructure
pkg_create(1)now supports a -C option, which allows packages to register a list of other packages with which they conflict. They will refuse to install (via pkg_add(1)) if one of the listed packages is already present. The -f flag to pkg_add(1) overrides this conflict-checking.
中譯:pkg_create 新支援 -C 參數,當登錄安裝軟體發生衝突時使用.
         可以透過 pkg_add 的 -f 參數強制忽略衝突性的檢查.

Upgrading from previous releases of FreeBSD
If you're upgrading from a previous release of FreeBSD, you generally will have three options:

Using the binary upgrade option of sysinstall(8). This option is perhaps the quickest, although it presumes that your installation of FreeBSD uses no special compilation options.

Performing a complete reinstall of FreeBSD. Technically, this is not an upgrading method, and in any case is usually less convenient than a binary upgrade, in that it requires you to manually backup and restore the contents of /etc. However, it may be useful in cases where you want (or need) to change the partitioning of your disks.

From source code in /usr/src. This route is more flexible, but requires more disk space, time, and technical expertise. More information can be found in the ``Using make world'' section of the FreeBSD Handbook. Upgrading from very old versions of FreeBSD may be problematic; in cases like this, it is usually more effective to perform a binary upgrade or a complete reinstall.
中譯:若你想要從前一版本升級到4.9R,你可以有三種選擇.
        1.透過 sysinstall 方式直接用binary升級.(沒有太多選擇設定,是最快的方式!!)
        2.完全的重新安裝FreeBSD.技術上來說,這不能算是升級動作..你必須自行備份 /etc 下的檔案
           不過,對於若要重新分割磁區來說,這是相當方便的.
        3.透過 /usr/src 進行更新.這個步驟是很有彈性的,但是需要額外的硬碟空間及*技術經驗*.
           從舊版本升級*可能*充滿問題,基本上來說,若要避免這個狀況,步驟1,2是比較有效率的.

Please read the INSTALL.TXT file for more information, preferably before beginning an upgrade. If you are upgrading from source, please be sure to read /usr/src/UPDATING as well.
中譯:在升級前請閱讀 INSTALL.TXT 及 /usr/src/UPDATING

Important: Upgrading FreeBSD should, of course, only be attempted after backing up all data and configuration files.
中譯:請務必注意,*在升級FreeBSD之前*,請務必備份*所有資料及相關設定檔*!!