linux下使用sha256sum生成sha256校驗文件，並校驗其一致性

[root@localhost 4]# echo "123" >test.zip

生成sha256文件校驗文件
[root@localhost 4]# sha256sum test.zip >test.zip.sha256sum

使用sha256sum校驗文件一致性
[root@localhost 4]# sha256sum -c <(grep test.zip test.zip.sha256sum)
test.zip: OK                                 //表示兩文件一致

[root@localhost 4]# echo "345" >>test.zip

[root@localhost 4]# sha256sum -c <(grep test.zip test.zip.sha256sum)
test.zip: FAILED
sha256sum: WARNING: 1 of 1 computed checksum did NOT match
//文件不一致