linux - How to read file from another file -

this script lists unit-*-slides.txt files in directory filelist.txt file , file list goes file , reads file , gives count of st^ lines file.but not counting in order ex 1,2,3,4,.... counting 10,1,2,3,4......

how read in order.

#!/bin/sh     #     outputdir=filelist     mk=$(mkdir $outputdir)     $mk     dest=$outputdir     cfile=filelist.txt     ofile="combine-slide.txt"      output=file-list.txt     path=/home/user/desktop/script     ls  $path/unit-*-slides.txt | sort -n -t '-' -k 2 > $dest/$cfile     echo "generating files list..."     echo "done"      #combining     while ifs= read file              if [ -f "$file" ];         tabs=$(cat unit-*-slides.txt | grep "st^" | split -l 200)         fi     done < "$dest/$cfile"     echo "combining done........!" 

try sort -n

tabs=$(cat $( ls unit-*-slides.txt | sort -n ) | grep "st^" | split -l 200) 

sort -n means numeric sort, output of ls ordered number.