Linux sys date changing Post: 23422

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Top Forums UNIX for Advanced & Expert Users Linux sys date changing Post 23422 by killerserv on Sunday 23rd of June 2002 08:19:47 PM

06-23-2002

Registered User

In Linux you can use dateconfig command. Note it vary with your Linux Kernel version, as i noticed they no longer using timetool (Old kernel supported ). Start the dateconfig on your shell and change the date & time.

Also take note:
Changing the date and time will change the system clock as well as the hardware clock. Clicking Apply is equivalent to executing the date and hwclock commands with the selected date and time.

The Network Time Protocol (NTP) daemon synchronizes the system clock with a remote time server or time source (such as a satellite). dateconfig allows you to configure a NTP daemon to synchronize your system clock with a remote server. To enable this feature, click the Enable Network Time Protocol button. This will enable the Server pulldown menu. You can choose one of the predefined servers or type a server name in the pulldown menu. Your system will not start synchronizing with the NTP server until you click Apply. After you click Apply, the configuration will be saved and the NTP daemon (ntpd) will be started (or restarted if it is already running). If you want this daemon to start automatically at boot time, you need to execute the command /sbin/chkconfig --level 345 ntpd on to enable ntpd for runlevels 3, 4, and 5.

For more information on NTP, read the NTP documentation available in the /usr/share/doc/ntp-version-number directory.

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LEARN ABOUT DEBIAN

ntpd

NTPD(8) 						      System Manager's Manual							   NTPD(8)

NAME

       ntpd - "Network Time Protocol daemon"

SYNOPSIS

       ntpd [-dnSsv] [-f file]

DESCRIPTION

       The  ntpd  daemon  synchronizes	the local clock to one or more remote NTP servers or local timedelta sensors.  ntpd can also act as an NTP
       server itself, redistributing the local time.  It implements the Simple Network Time Protocol version 4, as described in RFC 2030, and  the
       Network Time Protocol version 3, as described in RFC 1305.

       ntpd uses the adjtime(2) system call to correct the local system time without causing time jumps.  Adjustments larger than 128ms are logged
       using syslog(3) with LOG_INFO priority.	The threshold value is chosen to avoid having local clock drift thrash the log files.  Should ntpd
       be started with the -d option, all calls to adjtime(2) will be logged.

       When ntpd starts up, it reads settings from a configuration file, typically ntpd.conf(5).

       The options are as follows:

       -d     Do not daemonize.  If this option is specified, ntpd will run in the foreground and log to stderr.

       -f file
	      Use file as the configuration file, instead of the default /etc/openntpd/ntpd.conf.

       -n     Configtest mode.	Only check the configuration file for validity.

       -S     Do not set the time immediately at startup.  This is the default.

       -s     Set  the time immediately at startup if the local clock is off by more than 180 seconds.	Allows for a large time correction, elimi-
	      nating the need to run rdate(8) before starting .

       -v     This option allows ntpd to send DEBUG priority messages to syslog.

	      When ntpd receives a SIGINFO signal, it will write its peer and sensor status to syslog.

FILES

       /etc/openntpd/ntpd.conf
	      default ntpd configuration file

       /var/lib/openntpd/ntpd.drift
	      drift file, written by ntpd periodically and used at startup to get the initial clock drift

SEE ALSO

       date(1), adjfreq(2), adjtime(2), ntpd.conf(5), rdate(8), timed(8)

       , Network Time Protocol (Version 3), March 1992.

       , Simple Network Time Protocol (SNTP) Version 4, October 1996.

HISTORY

       The ntpd program first appeared in OpenBSD 3.6 .

							   $Mdocdate: November 10 2007 $						   NTPD(8)