On Fri, Nov 01, 2019 at 03:25:09PM +0700, Doan Tran Cong Danh wrote: > man 1p printf: > In addition to the escape sequences shown in the Base Definitions > volume of POSIX.1‐2008, Chapter 5, File Format Notation ('\\', > '\a', '\b', '\f', '\n', '\r', '\t', '\v'), "\ddd", where ddd is a > one, two, or three-digit octal number, shall be written as a byte > with the numeric value specified by the octal number. > > printf '\xfe\xff' in an extension of some shell. Typo: s/in/is/ Other than that, this looks great to me. Thanks. -Peff