下面是一個例子，它使用的所有檔案測試操作：
假設一個變數的檔案儲存現有檔案名"/var/www/yiibai/unix/test.sh"，其大小為100位元組，讀，寫和執行許可權：
#!/bin/sh file="/var/www/yiibai/unix/test.sh" if [ -r $file ] then echo "File has read access" else echo "File does not have read access" fi if [ -w $file ] then echo "File has write permission" else echo "File does not have write permission" fi if [ -x $file ] then echo "File has execute permission" else echo "File does not have execute permission" fi if [ -f $file ] then echo "File is an ordinary file" else echo "This is sepcial file" fi if [ -d $file ] then echo "File is a directory" else echo "This is not a directory" fi if [ -s $file ] then echo "File size is zero" else echo "File size is not zero" fi if [ -e $file ] then echo "File exists" else echo "File does not exist" fi
這將產生以下輸出結果：
File has read access File has write permission File has execute permission File is an ordinary file This is not a directory File size is zero File exists
記下以下幾點：
運算子和表示式之間必須有空格，例如2+2是不正確的，它應該寫成2 + 2。
if...then...else...fi 語句在下一章節中已經解釋的決策宣告。