tar -czvf test.tar.gz ./test.txt为什么每次打包的文件md5都是不一样的？

Question

这个难道自动加入了随机数？

Answer 1

是gzip在里面加入了timestamp，可以查看gzip的manpage

By default, gzip keeps the original file name and timestamp in the com
pressed file. These are used when decompressing the file with the -N option. This is useful when the compressed file name was truncated or when the time stamp was not preserved after a file transfer.

你试试只归档，不压缩，md5是一样的。