FreeBSD安装时自带2个shell:csh和sh。
相较于Linux*作系统,FreeBSD是分布在一个更宽松的许可*,这几乎可以无限制地重复使用和源代码修改为任何目的。
Compared to Linux, FreeBSD is distributed under a much less restrictive license, which allows virtually unrestricted re-use and modification of the source code for any purpose.