我刚刚加密了我的交换文件，现在重新启动后，运行时我看到两个带有“交换”的设备列出blkid：
/dev/loop0: UUID="82a141ee-b1fd-4d52-a1fb-c0690bed732e" TYPE="swap"
/dev/mapper/cryptswap1: UUID="3c73ab32-331e-47e7-8cb9-79f82ab41f5d" TYPE="swap"
这是否意味着我有两个交换文件，一个加密，一个未加密，或者这对于加密交换来说是否正常？
我/etc/fstab只列出一个：
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/nvme0n1p2 during installation
UUID=6135b409-f997-4289-895e-a0abb0617c2b / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=757B-FF35 /boot/efi vfat umask=0077 0 1
#/swapfile none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0
我的也一样/etc/crypttab：
# <target name> <source device> <key file> <options>
cryptswap1 /swapfile /dev/urandom swap,offset=1024,cipher=aes-xts-plain64
并将fdisk -lu它们列为具有4GiB：
Disk /dev/loop0: 4 GiB, 4294967296 bytes, 8388608 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/cryptswap1: 4 GiB, 4294443008 bytes, 8387584 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes