逐行迴圈遍歷檔案

Created: November-22, 2018

 placeholderCopywhile IFS= read -r line; do
   echo "$line"
done <file

如果檔案最後可能不包含換行符，則：

 placeholderCopywhile IFS= read -r line || [ -n "$line" ]; do
   echo "$line"
done <file