The firewall was turned on, then the SSH connection was blocked, and I disconnected from the server again

Step three I was in trouble. I don't know how to create a file system for a partition, like: NAME FSTYPE LABEL UUID MOUNTPOINT xvdf
├─xvdf1 ext4 1.0 cloudimg-rootfs cda0c0a7-e64a-4413-85a5-a0235f6f567f
├─xvdf14
└─xvdf15 vfat FAT32 UEFI 54D6-C8B8 You can see that xvdf14 does not have a file system, how can I do it? The case only says that if there is no file system, it is created: sudo mkfs -t xfs /dev/xvdf

But that's for all of it (I mean, if you're using xvdf, then xvdf1 xvdf14 xvdf15 will all create xfs filesystems, but sort of partitions already have filesystems)? I also tried this command, but it shows mkfs.xfs: /dev/xvdf appears to contain a partition table (gpt). mkfs.xfs: Use the -f option to force overwrite.

After that I tried adding a file system for that partition separately: sudo mkfs -t xfs /dev/xvdf/xvdf14 display Error accessing specified device /dev/xvdf/xvdf14: Not a directory I don't know how to add a separate file system for a partition, and the tutorial doesn't tell you how to add a separate file system for a partition, or if some subpartitions (like my example above) have a file system, then the large partition does not need a file system? I'm stuck in step three, prompting when I perform mount wrong fs type, bad option, bad superblock on /dev/xvdf, missing codepage or helper program, or other error.

When mounting the EBS that contains the data, do not execute commands that set up the file system.
As noted in the documentation, the data will be lost.

Do not use this command if you're mounting a volume that already has data on it (for example, a volume that was created from a snapshot). Otherwise, you'll format the volume and delete the existing data.

If you mount it according to the original file system, it should be fine.

mount -t ext4 /dev/xvdf /mnt/temp

I used this command and then prompted：

sudo mount -t ext4 /dev/xvdf /mnt/temp
mount: /mnt/temp: /dev/xvdf already mounted or mount point busy.

when I use:

sudo fuser -mv /mnt/temp

It prompted:

                     USER        PID ACCESS COMMAND
/mnt/temp:           root     kernel mount /
                     root          1 .rce. systemd
                     root          2 .rc.. kthreadd
                     root          3 .rc.. rcu_gp
                     root          4 .rc.. rcu_par_gp
                     root          5 .rc.. slub_flushwq
                     root          6 .rc.. netns
                     root          7 .rc.. kworker/0:0-events
                     root          8 .rc.. kworker/0:0H-events_highpri
                     root          9 .rc.. kworker/u30:0-events_power_efficient
                     root         10 .rc.. mm_percpu_wq
                     root         11 .rc.. rcu_tasks_rude_kthread
                     root         12 .rc.. rcu_tasks_trace_kthread
                     root         13 .rc.. ksoftirqd/0
                     root         14 .rc.. rcu_sched
                     root         15 .rc.. migration/0
                     root         16 .rc.. idle_inject/0
                     root         18 .rc.. cpuhp/0
                     root         20 .rc.. inet_frag_wq
                     root         21 .rc.. kauditd
                     root         22 .rc.. khungtaskd
                     ...

But when I use:

cd /mnt/temp

and

ls

There is nothing