root 无法 chown /mnt 目录

Question

我有一个 USB 盘，上面有一些目录。所有文件都属于根目录。

\n

whoami \nroot \n\nid\nuid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023\n\n\nlsblk -f \n[...]\n  \xe2\x94\x9c\xe2\x94\x80cs-root xfs               8cd99025-279f-4bc5-82c2-914200ae4e1a   /\n  \xe2\x94\x9c\xe2\x94\x80cs-swap swap              af0674c2-a5e9-4646-be91-93c6f876eb88   [SWAP]\n  \xe2\x94\x94\xe2\x94\x80cs-home xfs               39212c8d-0a88-4e55-91c9-a5751233a5ca   /home\nsdb                                                                  \n\xe2\x94\x94\xe2\x94\x80sdb1      vfat              36C7-16EE    #-> the faulty usb device, vfat formated.\n\nls -ld /mnt\ndrwxr-xr-x. 10 root root 32768 Dec 31  1969 /mnt\n

\n

我尝试将所有文​​件的所有权更改为普通用户 (achille)\n但由于意外错误消息，该命令失败

\n

chown achille: -R /mnt\n\n...\nchown: changing ownership of '/mnt/2.order/virtualbox/install.VirtualBox.Centos': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/install.virtualbox.local.repos': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/warning/install.AdditionsGuest': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/warning/install.virtualbox.local.repos': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/warning/readme.txt': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/warning': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/Centos8.ova': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/vbox.forum.infos.txt': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox/vbox.post': Operation not permitted\nchown: changing ownership of '/mnt/2.order/virtualbox': Operation not permitted\nchown: changing ownership of '/mnt/2.order/openssl.en-de_cryption': Operation not permitted\nchown: changing ownership of '/mnt/2.order': Operation not permitted\nchown: changing ownership of '/mnt/vim.config.files.paths': Operation not permitted\nchown: changing ownership of '/mnt': Operation not permitted\n

\n

我尝试：

\n

chown achille: /mnt\nchown: changing ownership of '/mnt': Operation not permitted\n

\n

我检查了 sysctl 配置，但看不到任何可能与此问题相关的内容：

\n

fs.protected_fifos = 0\nfs.protected_hardlinks = 1\nfs.protected_regular = 0\nfs.protected_symlinks = 1\n

\n

USB 上没有机械锁，但 USB 已满：

\n

df -h /mnt\nFilesystem      Size  Used Avail Use% Mounted on\n/dev/sdb1       7.4G  7.4G  384K 100% /mnt\n

\n

问题：出现这种错误的原因可能是什么？难道是因为vfat fs的原因？

\n

谢谢大家！！

\n

Answer 1

您vfat不能拥有所有者和组，因为它在其他文件系统中可用。因此，最好的方法（如果您想向普通用户提供权限）是卸载 USB 驱动器，更改权限和所有权/mnt，然后使用特定选项进行安装：

mount -o uid=achille,other_options /dev/sdb1 /mnt

（不确定uid选项是否适用于vfat）