> Yes. It's explained in the Texinfo documentation for find.
I see the word 'birth' appears in the following two places.
-newerXY reference
Compares the timestamp of the current file with reference. The
reference argument is normally the name of a file (and one of
its timestamps is used for the comparison) but it may also be a
string describing an absolute time. X and Y are placeholders
for other letters, and these letters select which time belonging
to how reference is used for the comparison.
a The access time of the file reference
B The birth time of the file reference
c The inode status change time of reference
m The modification time of the file reference
t reference is interpreted directly as a time
Some combinations are invalid; for example, it is invalid for X
to be t. Some combinations are not implemented on all systems;
for example B is not supported on all systems. If an invalid or
unsupported combination of XY is specified, a fatal error
results. Time specifications are interpreted as for the argu-
ment to the -d option of GNU date. If you try to use the birth
time of a reference file, and the birth time cannot be deter-
mined, a fatal error message results. If you specify a test
which refers to the birth time of files being examined, this
test will fail for any files where the birth time is unknown.
All the single character options except -H and -L as well as -amin,
-anewer, -cmin, -cnewer, -delete, -empty, -fstype, -iname, -inum,
-iregex, -ls, -maxdepth, -mindepth, -mmin, -path, -print0, -regex and all
of the -B* birthtime related primaries are extensions to IEEE Std
1003.1-2001 (``POSIX.1'').
Since it say "-B* birthtime ...", I guess that these are related to
birth time. But none of the following item explicitly says "birth". It
seems to me that "file's inode creation" is the same as "birth". If
so, I think that the info should be more explicit about this, as birth
time have been used in other places like man stat.
Also, how come 'man find' even doesn't mention -Btime?
-Bmin n
True if the difference between the time of a file's inode cre-
ation and the time find was started, rounded up to the next full
minute, is n minutes.
-Bnewer file
Same as -newerBm.
-Btime n[smhdw]
If no units are specified, this primary evaluates to true if the
difference between the time of a file's inode creation and the
time find was started, rounded up to the next full 24-hour
period, is n 24-hour periods.
If units are specified, this primary evaluates to true if the
difference between the time of a file's inode creation and the
time find was started is exactly n units. Please refer to the
-atime primary description for information on supported time
units.
BTW, I'm not sure the version of the info and man page of find. But I
have the following version of find.
~$ find --version
find (GNU findutils) 4.4.2
--
Regards,
Peng
