什么是 OpenSUSE Leap 15.4 中的 .snapshot 根目录？

Question

我需要释放 OpenSUSE Leap 15.4 服务器上的磁盘空间。

我注意到我在系统根目录下有一个

.snapshot

目录：

srv-abc:~ # ll -h /
total 0
drwxr-x---   1 root root   36 Sep 14  2021 .snapshots
drwxr-xr-x   1 root root 1.8K Jan 26 13:50 bin
drwxr-xr-x   1 root root 1.2K Jan 26 13:58 boot
drwxr-xr-x  17 root root 4.0K Mar 19 22:54 dev
drwxr-xr-x   1 root root 5.0K Mar 19 22:54 etc
drwxr-xr-x   1 root root   44 Mar 15  2022 home
drwxr-xr-x   1 root root  100 Jan 26 13:15 lib
drwxr-xr-x   1 root root 3.0K Jan 26 13:52 lib64
drwxr-xr-x   1 root root    0 Mar 15  2022 mnt
drwxr-xr-x   1 root root   22 Mar 15  2022 opt
dr-xr-xr-x 245 root root    0 Mar  1 16:28 proc
drwx------   1 root root  370 Mar 20 17:03 root
drwxr-xr-x  40 root root 1.1K Mar 19 00:00 run
drwxr-xr-x   1 root root 4.1K Jan 26 13:52 sbin
drwxr-xr-x   1 root root    0 Mar 15  2022 selinux
drwxr-xr-x   1 root root   84 Mar  1 16:29 srv
dr-xr-xr-x  13 root root    0 Mar  1 16:28 sys
drwxrwxrwt   1 root root 123K Mar 20 17:15 tmp
drwxr-xr-x   1 root root  110 Mar 15  2022 usr
drwxr-xr-x   1 root root  120 Jan 26 13:50 var

srv-abc:~ # du -sh /.snapshots
3.4G    /.snapshots

我首先想到的是创建快照的快照程序活动，但此选项被禁用（

USE_SNAPPER=no

在

/etc/sysconfig/yast2

文件中）并且文件系统不是 BTRFS。

srv-abc:~ # df -h
Filesystem                         Size  Used Avail Use% Mounted on
devtmpfs                           4.0M  8.0K  4.0M   1% /dev
tmpfs                              985M     0  985M   0% /dev/shm
tmpfs                              394M   26M  369M   7% /run
tmpfs                              4.0M     0  4.0M   0% /sys/fs/cgroup
/dev/sda2                           14G   13G  574M  96% /
/dev/sda2                           14G   13G  574M  96% /.snapshots
/dev/sda2                           14G   13G  574M  96% /boot/grub2/x86_64-efi
/dev/sda2                           14G   13G  574M  96% /boot/grub2/i386-pc
/dev/sda2                           14G   13G  574M  96% /opt
/dev/sda2                           14G   13G  574M  96% /home
/dev/sda2                           14G   13G  574M  96% /var
/dev/sda2                           14G   13G  574M  96% /usr/local
/dev/sda2                           14G   13G  574M  96% /srv
/dev/sda2                           14G   13G  574M  96% /tmp
/dev/sda2                           14G   13G  574M  96% /root
//srv-file.domain.fr/Procedures    3.1T  2.8T  348G  90% /srv/www/htdocs/public/files
tmpfs                              197M     0  197M   0% /run/user/1001

这个

.snapshot

目录是必需的吗？我可以自信地删除/清空它吗？