update May  30, 2013

This script is a substitute for the Unix tail command. Previously, 'tail +x' would print the contents of a file, beginning at line x. With Fedora 5, and possibly other Linux distributions, this syntax is no longer supported. The new Linux syntax is 'tail -n x'. However, this syntax is NOT supported on Solaris, or earlier Linux releases. Therefore, there is no longer a universally acceptible syntax for this function.

Given infile:
line 1
line 2
line 3
line 4

btail 3 infile outfile

will write
line 3
line 4

to outfile.