如何使用ntp强制更新时钟？

#1 楼

sudo service ntp stop
sudo ntpdate -s time.nist.gov
sudo service ntp start

#2 楼

sudo service ntp stop
sudo ntpd -gq
sudo service ntp start

#3 楼

sudo sntp -s 24.56.178.140

#4 楼

# apt-get install fake-hwclock


fake-hwclock: Save/restore system clock on machines without working RTC hardware

 Some machines don't have a working realtime clock (RTC) unit, or no
 driver for the hardware that does exist. fake-hwclock is a simple set
 of scripts to save the kernel's current clock periodically (including
 at shutdown) and restore it at boot so that the system clock keeps at
 least close to realtime. This will stop some of the problems that may
 be caused by a system believing it has travelled in time back to
 1970, such as needing to perform filesystem checks at every boot.

 On top of this, use of NTP is still recommended to deal with the fake
 clock "drifting" while the hardware is halted or rebooting.

#5 楼

sudo systemctl restart systemd-timesyncd.service

#6 楼

# sudo service ntp stop ; sudo ntpdate -s time.nist.gov ; sudo service ntp start

# sudo apt-get remove ntp

ntpdate -sb time.nist.gov

#7 楼

rdate -s tick.greyware.com

#8 楼

NTPD_OPTS="-g"

/etc/default/ntp

 start-stop-daemon --start --quiet --oknodo --pidfile /var/run/ntpd.pid --startas /usr/sbin/ntpd -- -p /var/run/ntpd.pid -g -u 124:128

#9 楼

sudo systemctl restart systemd-timesyncd

systemctl list-unit-files | grep -E 'ntp|timesyncd'

#10 楼

$ tlsdate -V -n -H encrypted.google.com

#11 楼

#12 楼

sudo date -s "$(wget -qSO- --max-redirect=0 google.com 2>&1 | grep Date: | cut -d' ' -f5-8)Z"

#13 楼

sudo apt-get update
sudo apt-get install ntpdate

auto eth0
    iface eth0 inet dhcp
    post-up /usr/local/sbin/update-time.sh

#!/bin/bash
# This script checks if the ntp process is running, stops it, updates the system time, starts it again

ps cax | grep -c ntpd > /dev/null
onoff=$?
if [ "$onoff" -gt 0 ]; then
    echo "stopping ntpd..."
    service ntp stop
    echo "ntpd stopped"
else
    echo "ntpd not running, ready to update the date"
fi


isinstalled=$(dpkg-query -l | grep -c ntpdate)
if [ "$isinstalled" -gt 0 ]; then
    ntpdate -t 3 -s ntp4.stratum2.ru
    echo "date and time update executed"
else
    echo "ntpdate package not installed, can't update using ntp"
fi

echo "restarting ntpd..."
service ntp start 
echo "ntpd running"
echo "printing current date and time:"
date

exit

#14 楼

#15 楼

ntp-wait || exit -1 
# i believe this would exit the script if it fails, but not sure of ntp-wait return codes, learn this first.

echo Time is synced, go ahead with backup
tar
rsync etc.

#16 楼

sudo systemctl restart ntp
# or
sudo systemctl restart ntp.service

#17 楼

#18 楼