I have this list of pdf files in a directory:
c0.pdf c12.pdf c15.pdf c18.pdf c20.pdf c4.pdf c7.pdf
c10.pdf c13.pdf c16.pdf c19.pdf c2.pdf c5.pdf c8.pdf
c11.pdf c14.pdf c17.pdf c1.pdf c3.pdf c6.pdf c9.pdf
I want to concatenate these using ghostscript in numerical order (similar to this):
gs -q -sPAPERSIZE=a4 -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=out.pdf *.pdf
But the shell expansion order does not reproduce the natural order of the numbers but the alphabetical order:
$ for f in *.pdf; do echo $f; done
How can I achieve the desired order in the expansion (if possible without manually adding
0-padding to the numbers in the file names)?
I've found suggestions to use
ls | sort -V, but I couldn't get it to work for my specific use case.