SYSTEMD-TIMESYNCD.SERVICE(8) systemd-timesyncd.service SYSTEMD-TIMESYNCD.SERVICE(8)NAME
systemd-timesyncd.service, systemd-timesyncd - Network Time Synchronization
SYNOPSIS
systemd-timesyncd.service
/lib/systemd/systemd-timesyncd
DESCRIPTION
systemd-timesyncd is a system service that may be used to synchronize the local system clock with a remote Network Time Protocol server. It
also saves the local time to disk every time the clock has been synchronized and uses this to possibly advance the system realtime clock on
subsequent reboots to ensure it monotonically advances even if the system lacks a battery-buffered RTC chip.
The systemd-timesyncd service specifically implements only SNTP. This minimalistic service will set the system clock for large offsets or
slowly adjust it for smaller deltas. More complex use cases are not covered by systemd-timesyncd.
The NTP servers contacted are determined from the global settings in timesyncd.conf(5), the per-link static settings in .network files, and
the per-link dynamic settings received over DHCP. See systemd.network(5) for more details.
timedatectl(1)'s set-ntp command may be used to enable and start, or disable and stop this service.
FILES
/var/lib/systemd/timesync/clock
This file contains the timestamp of the last successful synchronization.
SEE ALSO systemd(1), timesyncd.conf(5), systemd.network(5), systemd-networkd.service(8), timedatectl(1), localtime(5), hwclock(8)systemd 237SYSTEMD-TIMESYNCD.SERVICE(8)
Check Out this Related Man Page
SYSTEMD-NETWORKD.SERVICE(8) systemd-networkd.service SYSTEMD-NETWORKD.SERVICE(8)NAME
systemd-networkd.service, systemd-networkd - Network manager
SYNOPSIS
systemd-networkd.service
/lib/systemd/systemd-networkd
DESCRIPTION
systemd-networkd is a system service that manages networks. It detects and configures network devices as they appear, as well as creating
virtual network devices.
To configure low-level link settings independently of networks, see systemd.link(5).
systemd-networkd will create network devices based on the configuration in systemd.netdev(5) files, respecting the [Match] sections in
those files.
systemd-networkd will manage network addresses and routes for any link for which it finds a .network file with an appropriate [Match]
section, see systemd.network(5). For those links, it will flush existing network addresses and routes when bringing up the device. Any
links not matched by one of the .network files will be ignored. It is also possible to explicitly tell systemd-networkd to ignore a link by
using Unmanaged=yes option, see systemd.network(5).
When systemd-networkd exits, it generally leaves existing network devices and configuration intact. This makes it possible to transition
from the initrams and to restart the service without breaking connectivity. This also means that when configuration is updated and
systemd-networkd is restarted, netdev interfaces for which configuration was removed will not be dropped, and may need to be cleaned up
manually.
CONFIGURATION FILES
The configuration files are read from the files located in the system network directory /lib/systemd/network, the volatile runtime network
directory /run/systemd/network and the local administration network directory /etc/systemd/network.
Networks are configured in .network files, see systemd.network(5), and virtual network devices are configured in .netdev files, see
systemd.netdev(5).
SEE ALSO systemd(1), systemd.link(5), systemd.network(5), systemd.netdev(5), systemd-networkd-wait-online.service(8)systemd 237SYSTEMD-NETWORKD.SERVICE(8)
Introduction
Originally, we only had one shell on unix. When ran a command, the shell would attempt to invoke one of the exec() system calls on it. It the command was an executable, the exec would succeed and the command would run. If the exec() failed, the shell would not give up, instead it... (3 Replies)
FreeBSD Kernel Internals, Dr. Marshall Kirk McKusick
nwbqBdghh6E
The first hour of Marshall Kirk McKusick's course on FreeBSD kernel internals based on his book, The Design and Implementation of the FreeBSD Operating System. (0 Replies)
Introduction
I have seen some misinformation regarding Unix file permissions. I will try to set the record straight. Take a look at this example of some output from ls:
$ ls -ld /usr/bin /usr/bin/cat
drwxrwxr-x 3 root bin 8704 Sep 23 2004 /usr/bin
-r-xr-xr-x 1 bin bin ... (6 Replies)
Suppose I have a main() function with only one malloc statement allocating say some 1 gb memory. Also say my system has 1 gb of ram.
main()
{
malloc(1gb)
return(0)
}
The program above exits without freeing the memory.
In this case will the 1 gb of heap memory be returned... (9 Replies)
I see lot of ad-hoc shell scripts in our servers which don't have a shebang at the beginning .
Does this mean that it will run on any shell ?
Is it a good practice to create scripts (even ad-hoc ones) without shebang ? (16 Replies)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
A shout out to Scott who gave me a helping hand to turn a simple sample Vue.js app I wrote yesterday into a Vue.js component:
Vue.component("unix-time", {
template: `<div class="time">{{unixtime}}</div>`,
data() {
return {
unixtime: ""
};
},
methods: {
... (1 Reply)
i read here that linux provides no way to determine when a directory was created.
https://www.unix.com/shell-programming-and-scripting/157874-creation-date-directory.htmlI have a directory /home/andy/scripts that had a README file in it.
That file says
I put the script in that directory and... (3 Replies)
Hello.
I can use any particular (stupid or not) format when using bash date command.
Example :
~> date --date "now" '+%Y-%m-%d %H!%M!%S'
2019-06-03 12!55!33or
~> date --date "now" '+%Y£%m£%d %H¤%M¤%S'
2019£06£03 12¤57¤36
or
~> date --date "now" '+%Y-%m-%d %H-%M-%S'
2019-06-03 12-58-51
... (4 Replies)
Morning All
So, I am starting looking into the world of UNIX for a new job (luckily not my primary function!) and I am looking to get stared. Like anything I seem to learn best by trying things out first in an environment but I have a key question:
Currently I use Oracle VirtualBox, can... (8 Replies)
I've installed Slack 14.2 on /dev/sda1 (/dev/sda2 is swap) and FreeBSD 12 on /dev/sda3 and lilo is the boot manager.
FreeBSD slices are as follows;
/ on /dev/ada0S3a, swap on /dev/ada0s3e, /var on /dev/ada0s3b, /tmp on /dev/ada0s3d and /usr on /dev/ada0s3f.
I hesitate to install Solaris 10... (2 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
echo "Ready?"
sleep 2
... (10 Replies)