08-16-2010
Thank you for reply, Tytalus
Actually i have researched the fucntion date and it is workable, but my problem in this acticle is converting the date when call the last reboot command.
when I execute the "last reboot > last_reboot.txt" it is plain text. there are no YEAR in the text, so I cannot connvert the plain text without YEAR.
the data in the plain text
reboot system boot Fri Aug 6 15:07
reboot system down Fri Aug 6 15:04
reboot system boot Wed Jul 14 16:12
reboot system down Tue Jul 6 20:04
reboot system boot Tue Jul 6 19:59
reboot system down Fri May 7 10:22
reboot system boot Fri May 7 10:01
wtmp begins Fri May 7 10:01
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LEARN ABOUT CENTOS
poweroff
HALT(8) halt HALT(8)
NAME
halt, poweroff, reboot - Halt, power-off or reboot the machine
SYNOPSIS
halt [OPTIONS...]
poweroff [OPTIONS...]
reboot [OPTIONS...]
DESCRIPTION
halt, poweroff, reboot may be used to halt, power-off or reboot the machine.
OPTIONS
The following options are understood:
--help
Prints a short help text and exits.
--halt
Halt the machine, regardless of which one of the three commands is invoked.
-p, --poweroff
Power-off the machine, regardless of which one of the three commands is invoked.
--reboot
Reboot the machine, regardless of which one of the three commands is invoked.
-f, --force
Force immediate halt, power-off, reboot. Do not contact the init system.
-w, --wtmp-only
Only write wtmp shutdown entry, do not actually halt, power-off, reboot.
-d, --no-wtmp
Do not write wtmp shutdown entry.
--no-wall
Do not send wall message before halt, power-off, reboot.
EXIT STATUS
On success, 0 is returned, a non-zero failure code otherwise.
NOTES
These are legacy commands available for compatibility only.
SEE ALSO
systemd(1), systemctl(1), shutdown(8), wall(1)
systemd 208 HALT(8)