linux - bash 编程中的双 for 循环

Question

我想用 bash 编程做这样的事情

for file_x in file1, file2, file3, etc...  
  for file_y in file1, file2, file3, etc...  
    if file_y != file_x
      do something 

有什么建议吗？

Answer 1

#!/bin/bash

for file_x in "file1" "file2" "file3"
do  
  for file_y in "file1" "file2" "file3"
  do
    if cmp -q "$file_y" "$file_x"
    then
         echo "$file_y $file_x are equal"
    else
         echo "$file_y $file_x are not equal"
    fi
  done
done