透過 shell 找出目錄下的檔案

如何執行 shell 找出指定的目錄下的檔案或是特別的檔案？

常用的語法如下：

for f in file1 file2 file3
do
	echo "Processing $f" # always double quote "$f" filename
	# do something on $f
done

您也可以透過變數

FILES="file1
/path/to/file2
/etc/resolve.conf
"
for f in $FILES
do
	echo "Processing $f"
done

指定副檔名

for f in ./*.js 
do 
	echo "Processing $f file...."
done

Sample Shell Script To Loop Through All Files

#!/bin/bash
# NOTE : Quote it else use array to avoid problems #
FILES="/path/to/*"
for f in $FILES
do
  echo "Processing $f file..."
  # take action on each file. $f store current file name
  cat "$f"
done

檢查檔案是否存在

#!/bin/bash
FILES="/etc/sys*.conf"
for f in $FILES
do
# FAILSAFE #
# Check if "$f" FILE exists and is a regular file and then only copy it #
  if [ -f "$f" ]
  then
    echo "Processing $f file..."
    cp -f "$f" /dest/dir
  else
    echo "Warning: Some problem with \"$f\""
  fi
done

副檔名

for f in /path/to/*.pdf
do
	echo "Removing password for pdf file - $f"
	# always "double quote" $f to avoid problems
	/path/to/command --option "$f"
done

目前的目錄

dir="$PWD"
echo $dir

上一層的目錄

parent_dir="$(dirname "$dir")"
echo $parent_dir