one of that user’s
groups matches the group of the device. This option implies the
options nosuid and nodev (unless overridden by subsequent options,
as in the option line group,dev,suid).
iversion
Every time the inode is modified, the i_version field will be
incremented.
noiversion
Do not increment the i_version inode field.
mand
Allow mandatory locks on this filesystem. See fcntl(2). This option
was deprecated in Linux 5.15.
nomand
Do not allow mandatory locks on this filesystem.
_netdev
The filesystem resides on a device that requires network access
(used to prevent the system from attempting to mount these
filesystems until the network has been enabled on the system).
nofail
Do not report errors for this device if it does not exist.
relatime
Update inode access times relative to modify or change time. Access
time is only updated if the previous access time was earlier than or
equal to the current modify or change time. (Similar to noatime, but
it doesn’t break mutt(1) or other applications that need to know if
a file has been read since the last time it was modified.)
Since Linux 2.6.30, the kernel defaults to the behavior provided by
this option (unless noatime was specified), and the strictatime
option is required to obtain traditional semantics. In addition,
since Linux 2.6.30, the file’s last access time is always updated if
it is more than 1 day old.
norelatime
Do not use the relatime feature. See also the strictatime mount
option.
strictatime
Allows to explicitly request full atime updates. This makes it
possible for the kernel to default to relatime or noatime but still
allow userspace to override it. For more details about the default
system mount options see /proc/mounts.
nostrictatime
Use the kernel’s default behavior for inode access time updates.
lazytime
Only update times (atime, mtime, ctime) on the in-memory version of
the file inode.
This mount option significantly reduces writes to the inode table
for workloads that perform frequent random writes to preallocated
files.
The on-disk timestamps are updated only when:
• the inode needs to be updated for some change unrelated to file
timestamps
• the application employs fsync(2), syncfs(2), or sync(2)
• an undeleted inode is evicted from memory
• more than 24 hours have passed since the inode was written to
disk.
nolazytime
Do not use the lazytime feature.
suid
Honor set-user-ID and set-group-ID bits or file capabilities when
executing programs from this filesystem.
nosuid
Do not honor set-user-ID and set-group-ID bits or file capabilities
when executing programs from this filesystem. In addition, SELinux
domain transitions require permission nosuid_transition, which in
turn needs also policy capability nnp_nosuid_transition.
silent
Turn on the silent flag.
loud
Turn off the silent flag.
owner
Allow an ordinary user to mount the filesystem if that user is the
owner of the device. This option implies the options nosuid and
nodev (unless overridden by subsequent options, as in the option
line owner,dev,suid).
remount
Attempt to remount an already-mounted filesystem. This is commonly
used to change the mount flags for a filesystem, especially to make
a readonly filesystem writable.