FreeBSD 11.0-BETA4 发布了，FreeBSD是一种自由类Unix操作系统，是由经过BSD、386BSD和4.4BSD发展而来的类Unix的一个重要分支。
本次发布主要改进记录如下：
The mtx_trylock_spin(9) kernel synchronization primitive was added.
The machdep.disable_msix_migration loader tunable has been re-enabled for EC2 AMIs.
The iwm(4) and iwmfw(4) drivers have been updated.
The new system hardening options have been fixed to avoid overwriting ther options selected during install time.
Several build-related fixes.
Several miscellaneous bug fixes.
下载地址：ftp://ftp.freebsd.org/pub/FreeBSD/releases/ISO-IMAGES/11.0/
来自:开源中国社区
