On Jul 12 23:54:56, open...@cpnetserver.net wrote: > Forgive my fault and my English! > What I want to know is why [technically] the scipt: mkdir $(date +'%d'),
That's not a script. That's a line from some script which you haven't shown us. > whith the default system date, with no manual insertion, return this > sequence of digits: That line doesn't return any sequence of digits, it creates directories. > 1, 2, 3, 4, 5, 6, 7, 08, 09, 10, etc. > Why the '0' [zero] appears only after the digit 7? One might _guess_ that's where the "0n" is no longer a valid octal number, but without seeing your broken script, that's all: a guess.