ntp is needed to sync internet time? or is systemd-timesyncd enough?

[juaners0n]

Hi mates, please I need to clarify my doubt, because LMDE coming with systemd-timesyncd (new way from I know), and LM 20.3 coming with ntp + ntpdate (old way if I am right). My question is, ntp is needed to sync the internet time? or is systemd-timesyncd enough?

[t42]

is systemd-timesyncd enough?

it's enough, just read man systemd-timesyncd.service and man timedatectl, as well used in LM.

[Termy]

Essentially, NTP is a TCP/IP protocol for synchronizing time over a network, which is very useful. Put simply, it allows the system to fetch the correct time from a server. In Ubuntu, as of 16.04 (presumably following Debian's footsteps), SystemD includes functionality (to which you eluded) which replaces the need for NTP, via timedatectl(1). Unless you use NTP, its package isn't needed and can typically be safely removed, as far as I'm aware. Unless of course you have something which depends on it.

[t42]

Unless you use NTP

... as in enterprise or scientific environment where far greater precision is required.

[juaners0n]

it's enough, just read man systemd-timesyncd.service and man timedatectl, as well used in LM.

Thank you friend, very helpful information.

[juaners0n]

Essentially, NTP is a TCP/IP protocol for synchronizing time over a network, which is very useful. Put simply, it allows the system to fetch the correct time from a server. In Ubuntu, as of 16.04 (presumably following Debian's footsteps), SystemD includes functionality (to which you eluded) which replaces the need for NTP, via timedatectl(1). Unless you use NTP, its package isn't needed and can typically be safely removed, as far as I'm aware. Unless of course you have something which depends on it.

Thank you very much, now I have clear the use of NTP.