unix - IF 语句比较 Unix 中的两个文件

Question

我有一个 unix 脚本，它将为两个文件创建 md5sum，然后检查这两个文件是否匹配。这是脚本的一个示例 - 但这没有正确比较文件 - 任何人都可以对此有所了解吗？

md5sum version1.txt >> file1
md5sum version2.txt >> file2

if [ $file1 == $file2 ]
then
    echo "Files have the same content"
else
    echo "Files have NOT the same content"
fi

Answer 1

if [ "$(md5sum < version1.txt)" = "$(md5sum < version2.txt)" ]; then
    echo "Files have the same content"
else
    echo "Files have NOT the same content"
fi

如果 MD5 校验和之一已经计算并存储在文本文件中，您可以使用

if [ "$(md5sum < version1.txt)" = "$(awk '{print $1}' md5hash.txt)" ]; then
...

Answer 2

HASH1=`md5sum version1.txt | cut -f1 -d ' '`
HASH2=`md5sum version2.txt | cut -f1 -d ' '`

if [ "$HASH1" = "$HASH2" ]; then
    echo "Files have the same content"
else
    echo "Files have NOT the same content"
fi

---

或者：

if cmp -s version1.txt version2.txt; then
    echo "Files have the same content"
else
    echo "Files have NOT the same content"
fi

Answer 3

if [ "$file1" == "$file2" ]
then
    echo "Files have the same content"
else
    echo "Files have NOT the same content"
fi