On Wed, Feb 28, 2018 at 03:25:21AM -0500, William Entriken wrote: > from=1 > to=3 > ls {$from..$to}
> Bash fails the chained substitution with: > > ls: {1..3}: No such file or directory This is simply not a feature that bash implements. Bash does the expansions in the opposite order (brace expansion first, then parameter expansion second), so it does not work. If you want to open a feature request for it, I'll let Chet respond.