NTP is very handy for server clock synchronisation, but it can be cumbersome to deploy.

Sometimes you just need to do a one-shot clock synchronisation, so you use the standard date command. But there isn't a flag to easily copy a setting to another.

From a remote host

Quite easy :

# date `ssh remoteuser@remotehost date +%m%d%H%M%Y.%S`

To a remote host

It's also very easy[1] :

# ssh root@remotehost date `date +%m%d%H%M%Y.%S`


[1] Yes, I do know that logging remotely as root is a security pitfall...