On 9/2/15 10:00 AM, ziyunfei wrote: > bash-4.3$ echo $'\?' > ? > > \? should be added there.
Backslash-escape sequences that are not present in the documentation are left unchanged. Posix leaves these up to the implementation. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, ITS, CWRU c...@case.edu http://cnswww.cns.cwru.edu/~chet/