NAME
adjtime_config - information about hardware clock setting and drift factor
SYNOPSIS
/etc/adjtime
DESCRIPTION
The file /etc/adjtime contains descriptive information about the hardware mode clock setting and clock drift factor. The file is read and write by hwclock(8); and read by programs like rtcwake to get RTC time mode.
The file is usually located in /etc, but tools like hwclock(8) or rtcwake(8) can use alternative location by command line options if write access to /etc is unwanted. The default clock mode is "UTC" if the file is missing.
The Hardware Clock is usually not very accurate. However, much of its inaccuracy is completely predictable - it gains or loses the same amount of time every day. This is called systematic drift. The util hwclock(8) keeps the file /etc/adjtime, that keeps some historical information. For more details see "The Adjust Function" and "The Adjtime File" sections from hwclock(8) man page.
The adjtime file is formatted in ASCII.
First line
Three numbers, separated by blanks:
drift factor
last adjust time
adjustment status
Second line
last calibration time
Third line
clock mode
FILES
/etc/adjtime
SEE ALSO
hwclock(8), rtcwake(8)
REPORTING BUGS
For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>.
AVAILABILITY
adjtime_config is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.