Jeg ville checke rettighederne på filerne og kigge på en oversigt med indstillingerne for systemets mounts med findmnt.
mount man siden om bind mounts, så tråden bliver mere komplet:
Kode: Vælg alt
The bind mounts.
Since Linux 2.4.0 it is possible to remount part of the file hierarchy
somewhere else. The call is:
mount --bind olddir newdir
or by using this fstab entry:
/olddir /newdir none bind
After this call the same contents are accessible in two places. One can also
remount a single file (on a single file). It's also possible to use the bind
mount to create a mountpoint from a regular directory, for example:
mount --bind foo foo
The bind mount call attaches only (part of) a single filesystem, not possible
submounts. The entire file hierarchy including submounts is attached a
second place by using:
mount --rbind olddir newdir
Note that the filesystem mount options will remain the same as those on the
original mount point, and cannot be changed by passing the -o option along with
--bind/--rbind. The mount options can be changed by a separate remount
command, for example:
mount --bind olddir newdir
mount -o remount,ro newdir
Note that the behavior of the remount operation depends on the /etc/mtab file.
The first command stores the 'bind' flag in the /etc/mtab file and the second
command reads the flag from the file. If you have a system without the
/etc/mtab file or if you explicitly define source and target for the remount
command (then mount(8) does not read /etc/mtab), then you have to use the bind
flag (or option) for the remount command too. For example:
mount --bind olddir newdir
mount -o remount,ro,bind olddir newdir
Note that remount,ro,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.