Just some quick note on configuring NTP client on CentOS/RHEL/Fedora and forcing time update. Just got tired of having to remember these steps every time I run into NTP.

#!/bin/bash
date
yum -y install ntp
cat << EOF > /etc/ntp.conf
driftfile /var/lib/ntp/drift
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict -6 ::1
server 0.pool.ntp.org
server 1.pool.ntp.org
server 2.pool.ntp.org
server 3.pool.ntp.org
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
EOF
chkconfig ntpd on
service ntpd stop
ntpdate 0.pool.ntp.org
service ntpd restart
date