cp/mv会改掉iso文件的md5sum?????
发表于 ： 2010-08-02 18:03
把 iso文件拷到另一个分区上md5sum就变了
其他文件没问题
其他文件没问题
代码： 全选
ubuntu@ubuntu:~$ md5sum ubuntu-10.04-desktop-i386.iso
d044a2a0c8103fc3e5b7e18b0f7de1c8 ubuntu-10.04-desktop-i386.iso
ubuntu@ubuntu:/mnt/ubuntu$ sudo mv /home/ubuntu/ubuntu-10.04-desktop-i386.iso .
ubuntu@ubuntu:/mnt/ubuntu$ ls
bin initrd.img media sbin ubuntu-10.04-desktop-i386.iso
boot initrd.img.old mnt selinux usr
dev lib opt srv var
etc lib64 proc sys vmlinuz
home lost+found root tmp vmlinuz.old
ubuntu@ubuntu:/mnt/ubuntu$ md5sum ubuntu-10.04-desktop-i386.iso
3fafb1c963d87a796b0c92249f7f4fe3 ubuntu-10.04-desktop-i386.iso
ubuntu@ubuntu:/mnt/ubuntu$ cp ubuntu-10.04-desktop-i386.iso ~
ubuntu@ubuntu:/mnt/ubuntu$ md5sum /home/ubuntu/ubuntu-10.04-desktop-i386.iso
3fafb1c963d87a796b0c92249f7f4fe3 /home/ubuntu/ubuntu-10.04-desktop-i386.iso
ubuntu@ubuntu:/mnt/ubuntu$ sudo md5sum /home/ubuntu/ubuntu-10.04-desktop-i386.iso
3fafb1c963d87a796b0c92249f7f4fe3 /home/ubuntu/ubuntu-10.04-desktop-i386.iso
ubuntu@ubuntu:~$ md5sum aaa
297bbb1cfe5f6a86ea8dccade36c2dde aaa
ubuntu@ubuntu:~$ cp aaa bbb
ubuntu@ubuntu:~$ md5sum aaa
297bbb1cfe5f6a86ea8dccade36c2dde aaa
ubuntu@ubuntu:~$ md5sum bbb
297bbb1cfe5f6a86ea8dccade36c2dde bbb
ubuntu@ubuntu:~$ cp aaa /mnt/ubuntu/test
cp: cannot create regular file `/mnt/ubuntu/test': Permission denied
ubuntu@ubuntu:~$ sudo cp aaa /mnt/ubuntu/test
ubuntu@ubuntu:~$ md5sum /mnt/ubuntu/test
297bbb1cfe5f6a86ea8dccade36c2dde /mnt/ubuntu/test