至少我知道支付宝可以查京东第三方商家发的韵达快递...自动的...

你需要特定的用户
那第一次挂在参数就 -o uid=username,gid=username,fmask=133,dmask=022

第二次 mount --bind

第三次 mount -o remount,bind,ro

这样不就是特定的用户 username 只读了？

host ~ # mkdir -p 123 456
host ~ # mount --bind 123 456
host ~ # mount -o remount,bind,ro 123 456
host ~ # cd 456; touch 123
touch: cannot touch '123': Read-only file system

@pq
man mount 中说的很清楚了啊

mkdir -p 123 456
mount --bind 123 456
mount -o remount,bind,ro 123 456
cd 456; touch 123

试试结果是什么

man mount

...

mount(8) since v2.27 allows to change the mount options by passing the relevant options along with --bind.
For example:

mount --bind,ro foo foo

This feature is not supported by the Linux kernel; it is implemented in userspace by an additional mount(2)
remounting system call. This solution is not atomic.

The alternative (classic) way to create a read-only bind mount is to use the remount operation, for example:

mount --bind olddir newdir
mount -o remount,bind,ro olddir newdir

Note that a read-only bind will create a read-only mountpoint (VFS entry), but the original filesystem
superblock will still be writable, meaning that the olddir will be writable, but the newdir will be read-only.

It's also possible to change nosuid, nodev, noexec, noatime, nodiratime and relatime VFS entry flags by
"remount,bind" operation. It's impossible to change mount options recursively (for example with -o rbind,ro).

@pq 那第二次 mount 就 -o bind,ro
只读

第一行中 fmask=177,dmask=077

root 权限
mount -t ntfs-3g -o uid=root,gid=root,fmask=133,dmask=022 /dev/sdb1 /mnt/data

username 用户
mount -t ntfs-sg -o bind,uid=username,gid=users /mnt/data/dir /home/uid/path

为什么过了 3 年不给换，这个问题我上次手机换电池，特意问了天才吧，人家说可以换的，当然我买了延保服务。

s/你如 /不如 /

配置到你满意的 mac mini，外加个 4k 显示器
说真的，你如直接 iMac

不是新闻说房租多地下降了么

87 双模 茶

阿里终于压倒数字，成为行内口碑第一差