Linux 中如何磁盘加密

1、首先我们安装分区工具

[root@vipuser200 ~]# yum -y install cryptsetup#yum安装加密工具

2、其次我们在虚拟机上添加一个分区

[root@vipuser200 ~]# fdisk /dev/sdd#步骤就不详解了[root@vipuser200 ~]# partprobe /dev/sdd#获取分区表[root@vipuser200 ~]# cryptsetup luksFormat /dev/sdd1#设置密码Format F必须大写WARNING!========This will overwrite data on /dev/sdd1 irrevocably.Are you sure? (Type uppercase yes): YES#必须为大写YESEnter LUKS passphrase: #密码Verify passphrase:#再次验证密码

3、映射分区这样做事为了安全类似于昨天的软连接

[root@vipuser200 ~]# cryptsetup luksOpen /dev/sdd1 my_disk#Open O必须大写Enter passphrase for /dev/sdd1:#密码

4、查看加密磁盘映射分区

[root@vipuser200 ~]# ll /dev/mapper/#存放位置total 0crw-rw---- 1 root root 10, 58 Jul 27 01:01 controllrwxrwxrwx 1 root root 7 Jul 27 01:20 my_disk -> ../dm-0#注：my_disk 指向/dm-0

5、格式化映射分区

[root@vipuser200 ~]# mkfs.ext4 /dev/mapper/my_disk

6、创建挂载点并挂在分区

[root@vipuser200 ~]# mkdir mapper_mount#创建挂载点[root@vipuser200 ~]# mount /dev/mapper/my_disk mapper_mount/#挂载

7、查看挂载状况

[root@vipuser200 ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda2 9.9G 1.4G 8.0G 15% /tmpfs 479M 0 479M 0% /dev/shm/dev/sda1 194M 27M 158M 15% /boot/dev/sr0 3.6G 3.6G 0 100% /mnt/dev/mapper/my_disk 20G 172M 19G 1% /root/mapper_mount

8、关闭加密分区

[root@vipuser200 ~]# umount /root/mapper_mount/#首先卸载[root@vipuser200 ~]# cryptsetup luksClose /dev/mapper/my_disk#关闭加密分区 luksClose C大写[root@vipuser200 ~]# mount /dev/sdd1 mapper_mount/#再次挂载发现失败mount: unknown filesystem type 'crypto_LUKS#如果需要使用该磁盘则需要先打开磁盘及luksOpen命令然后载挂载