Re: EPOCHREALTIME to days, hours, minutes, seconds

[Greg Wooledge]

On Fri, Aug 20, 2021 at 10:06:53PM +0300, Tapani Tarvainen wrote:
> Incidentally, [![:digit:]] does not work there, you need to use the
> POSIX-specified caret (^) instead of an exclamation mark when using
> character classes.

You've got it backwards.  POSIX specifies ! for use in globs, and bash
permits ^ as an extension, for people who are used to ^ from regular
expressions.

Perhaps you "tested" this using grep or [[ =~ ]] or something else that
uses regular expressions, not globs.