当我尝试sudo swapon -a收到此消息时：
swapon: /dev/sdb4: read swap header failed: Invalid argument
sdb4 是我的交换分区所在的位置。
sudo blkid 回馈这个：
/dev/sdb1: UUID="75622b47-3265-48a6-a697-265b44bdfe55" TYPE="ext4"
/dev/sdb3: UUID="d638620e-b8b1-49ae-b234-7e89aa0de676" TYPE="ext4"
/dev/sdb5: UUID="E656-2CAB" TYPE="vfat"
/dev/mapper/cryptswap1: UUID="83e2e318-eee6-4864-a1c4-330bd16bc6a7" TYPE="swap"
这是内容fstab：
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sdb1 during installation
UUID=75622b47-3265-48a6-a697-265b44bdfe55 / ext4 errors=remount-ro 0 1
# swap was on /dev/sdb4 during installation
#UUID=86d7eebb-b840-4fb0-a1fc-a84074062cb2 none swap sw 0 0
#/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0 …