file1.txt
file2.txt
file3.txt
...

while read line; do echo $line; done < filelist.txt

while read line; do ls -l $line; done < filelist.txt

mkdir -p backup; while read line; do cp $line backup/; done < filelist.txt

#!/bin/sh
while read line; do
    some_command_with $line
done <$file                   

: No such file or directory
: No such file or directory
: No such file or directory

perl -pi -e 's/\r\n/\n/g' filelist.txt