DIR

Under FreeBSD and other unix-like OSes, the equivalent command is ls.

ls is best combined with grep if you plan on doing any filtering.

dir *.txt is equivalent to ls | grep .txt

dir boogy*.* is equivalent to ls | grep boogy

Note that in this second example, ls | grep boogy is actually directly equivalent to dir *boogy*.*, not just dir boogy*.*. If you really want to only find instances in which "boogy" is the very beginning of the filename, you'll need to delve into using grep with regular expressions.