rdate -s ntp.domain.com
# man rdate
hwclock --systohc
hwclock --show
ntpstat
service ntpd status
service ntpd restart
chkconfig --levels 2345 ntpd on
ntpstat
ntpdc -p
date


Synchronize date and time with a server over ssh

Set Remote Server Date using Local Server Time (push) Show Sample Output

ssh user@server sudo date -s @`( date -u +"%s" )`


Synchronize date and time with a server over ssh

using -u is better for standardizing date output and timezones, for servers in different timezones.

2
date --set="$(ssh user@server 'date -u')"
unixmonkey49259 · 2013-06-03 06:43:49 0
Synchronize date and time with a server over ssh

If you are stuck behind a firewall and want to synchronize time with another server but you do not want to port forward NTP (which uses UDP) then this command is handy. It gets the time from a server and sets the local time. It is not that accurate but I can live with a second or so drift. Show Sample Output

1
date +%Y%m%d%T -s "`ssh user@server 'date "+%Y%m%d %T"'`"
unixmonkey16473 · 2011-01-11 10:33:32 0
Synchronize date and time with a server over ssh

Neat idea! This variation works on FreeBSD.

0
date `ssh user@server date "+%y%m%d%H%M.%S"`


timedatectl

sudo timedatectl set-ntp off