June 23rd, 2003, 08:32 AM
redhat 8 won't let me change my clock time
ive had redhat 8 as my 'server' system for about a year now and i moved the time forward an hour for daylight saving here in aus, now it refuses to let me change it back at all, no in root user or any other user, on the other account it prompts me for the root pass which i give it, on the root account nothing hapens at all, there is a bit of disk activity like it is trying to load the config but nothing shows up and its stuck an hour too fast, i know its not system critical but its just annoying
ive tried through the shortcut on the taskbar, with all my accounts and also through the 'menu' in system settings i think it is
please help me get my time right pls
June 23rd, 2003, 09:12 AM
mine updates via a ntpdate server..
but you should be able to set the clock with the date command..
in short: http://www.linuxsa.org.au/tips/time.html
DATE(1) User Commands DATE(1)
date - print or set the system date and time
date [OPTION]... [+FORMAT]
date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]
Display the current time in the given FORMAT, or set the system date.
display time described by STRING, not `now'
like --date once for each line of DATEFILE
output date/time in ISO 8601 format. TIMESPEC=`date' for date
only, `hours', `minutes', or `seconds' for date and time to the
indicated precision. --iso-8601 without TIMESPEC defaults to
display the last modification time of FILE
output RFC-822 compliant date string
set time described by STRING
-u, --utc, --universal
print or set Coordinated Universal Time
--help display this help and exit
output version information and exit
FORMAT controls the output. The only valid option for the second form
specifies Coordinated Universal Time. Interpreted sequences are:
%% a literal %
%a locale's abbreviated weekday name (Sun..Sat)
%A locale's full weekday name, variable length (Sunday..Saturday)
%b locale's abbreviated month name (Jan..Dec)
%B locale's full month name, variable length (January..December)
%c locale's date and time (Sat Nov 04 12:02:33 EST 1989)
%C century (year divided by 100 and truncated to an integer)
%d day of month (01..31)
%D date (mm/dd/yy)
%e day of month, blank padded ( 1..31)
%F same as %Y-%m-%d
%g the 2-digit year corresponding to the %V week number
%G the 4-digit year corresponding to the %V week number
%h same as %b
%H hour (00..23)
%I hour (01..12)
%j day of year (001..366)
%k hour ( 0..23)
%l hour ( 1..12)
%m month (01..12)
%M minute (00..59)
%n a newline
%N nanoseconds (000000000..999999999)
%p locale's upper case AM or PM indicator (blank in many locales)
%P locale's lower case am or pm indicator (blank in many locales)
%r time, 12-hour (hh:mm:ss [AP]M)
%R time, 24-hour (hh:mm)
%s seconds since `00:00:00 1970-01-01 UTC' (a GNU extension)
%S second (00..60)
%t a horizontal tab
%T time, 24-hour (hh:mm:ss)
%u day of week (1..7); 1 represents Monday
%U week number of year with Sunday as first day of week (00..53)
%V week number of year with Monday as first day of week (01..53)
%w day of week (0..6); 0 represents Sunday
%W week number of year with Monday as first day of week (00..53)
%x locale's date representation (mm/dd/yy)
%X locale's time representation (%H:%M:%S)
%y last two digits of year (00..99)
%Y year (1970...)
%z RFC-822 style numeric timezone (-0500) (a nonstandard extension)
%Z time zone (e.g., EDT), or nothing if no time zone is deter-
By default, date pads numeric fields with zeroes. GNU date recognizes
the following modifiers between `%' and a numeric directive.
`-' (hyphen) do not pad the field `_' (underscore) pad the field
Written by David MacKenzie.
Report bugs to <email@example.com>.
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
The full documentation for date is maintained as a Texinfo manual. If
the info and date programs are properly installed at your site, the
should give you access to the complete manual.
date (sh-utils) 2.0.15 August 2002 DATE(1)
Setting the system clock
To set the system clock under Linux, use the date command. As an example, to set the current time and date to July 31, 11:16pm, type ``date 07312316'' (note that the time is given in 24 hour notation). If you wanted to change the year as well, you could type ``date 073123161998''. To set the seconds as well, type ``date 07312316.30'' or ``date 073123161998.30''. To see what Linux thinks the current local time is, run date with no arguments.
Setting the hardware clock
To set the hardware clock, my favourite way is to set the system clock first, and then set the hardware clock to the current system clock by typing ``/sbin/hwclock --systohc'' (or ``/sbin/hwclock --systohc --utc'' if you are keeping the hardware clock in UTC). To see what the hardware clock is currently set to, run hwclock with no arguments. If the hardware clock is in UTC and you want to see the local equivalent, type ``/sbin/hwclock --utc''
ASCII stupid question, get a stupid ANSI.
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June 23rd, 2003, 09:16 AM
As long as you aren't dual booting with a lame OS then you won't need to manually adjust for daylight saving - the Linux timezone should take care of that.
If you *are* dual booting with a lame OS, you have bigger problems - I normally keep the lame OS in GMT (of course closer here in the UK) and let Linux worry about daylight saving.
Some Lame OSs seem to have the stupid idea of storing the time in the hardware clock in local time with daylight savings. This is a fantastically bad thing to do, because it means they have to adjust the hardware clock twice a year, but have no way of telling other OSs (even by the same vendor) on the same machine that they've done that, meaning that they cannot possibly get it right in the long term.
All systems which are vaguely sensible keep the hardware clock in UTC. Or at least the same timezone all year.
As for your problem - Presumably Redhat's KDE desktop or whatever just doesn't work properly, just adjust it from the command line with the "date" command (read the man page).