I have an Ubuntu 11.04 installation. The /home
directory is on a partition
which uses the ext4
filesystem. I haven't changed the default configuration so
the filesystem is mounted at boot time with the defaults
mount option. man mount
explains which mount options the option defaults
implies:
rw
, suid
, dev
, exec
, auto
, nouser
, and async
.
I noticed that the access time (atime
) of a file isn't updated every time I
access a file (for example with an editor or cat
).
I looked around in the man page of mount
and found the following option:
relatime
: Update inode access times relative to modify or change time. Access time is only updated if the previous access time was earlier than the current modify or change time.
This is exactly the behaviour which I observe on my system. But the relatime
mount option is not enabled.
Is the behaviour described in the description of the relatime
mount option the
default behaviour of atime
? Does this apply to all filesystems which support
atime
?
mount
command with no options will output the currently mounted volumes, with currently active mount options (with thedefaults
option already expanded into actual values).