similar to: System Time Jumps During Boot on CentOS 7

Hello, The last weekend, the VM with CentOS 7 (kernel-3.10.0-327.28.2.el7.x86_64) was running with 2.5GB of used memory, but without users connected, and heavy services running. Three minutes after reboot, the o.s. is running with 114MB used. ?Why the 62% of memory is used if the o.s. does not have an intensive load? top sorted by memory: top - 12:55:34 up 8 days, 21:41, 1 user, load

This is for centos 7 that has chronyd 2.1.1 I am looking into how to use chronyd as my local ntp server. On my old servers with ntpd I had local access control lines like: restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap But in looking for documentation on chronyd I did not find anything on this at: https://chrony.tuxfamily.org/doc/2.1/manual.html In the actual /etc/chronyd.conf

On 5/24/2015 12:22 PM, Gordon Messmer wrote: > On 05/24/2015 11:41 AM, Kirk Bocek wrote: >> to activate your selected daemon. I just used the new systemd commands, >> thinking that would be enough. So I tried that and rebooted. Nope, same >> problem: > > chronyd and ntpd both use UDP port 123, so each will terminate the > other when it starts. If both are enabled,

AFAIK the only thing needed to make your host an NTP server using chrony is to set the allow line to the network address in CIDR format of the network you want to be served, and uncomment it. The restart chronyd. You also need to ensure that port 123 (NTP) is open to your internal network on your filrewall. I have a CentOS 6 box that is an NTP server for my network. CentOS 7 works the same

Hi, As Centos 7 and Fedora defaults to chronyd [2] , should I use ntpd for some reason [3] ? I based my configurations on [1] which use ntpd ... but I thinking change for chronyd , change ntp deamons could outage the samba service and client computers ? Thanks [1] https://negativo17.org/samba-4-active-directory-with-bind-dlz-zones-dynamic-dns-updates-windows-static-rpc-2/ [2]

My Centos7 system does not have a battery for the clock (like most armv7 SOCs), thus I rely on that at some point in boot time, chronyd sets the time. If a file is updated prior to chronyd accomplishing its task (or network connectivity is down), the file ends up with a timestamp of "Dec 31 1969". I notice that occasionally, after a reboot, /etc/aliases.db reverts to this time,

Hi everyone, We seem to be having issues on multiple CentOS 7.3 machines. The problem seems to revolve around polkitd. At some random time, polkitd seems to stop responding on my systems. Along with this, there might be hundreds of defunct pkla-check-authorization processes. If I reboot, then things are fine for a while. I don't see any activity in the unabridged journal to suggest anything

Hi, the instructions for "Time Synchronisation - SELinux Labeling and Policy" on https://wiki.samba.org/index.php/Time_Synchronisation_-_SELinux_Labeling_and_Policy don't seem to work on CentOS 8. Using chrony I tried to adapt them (with very limited SELinux knowledge) like this: chcon -u system_u -t chronyd_exec_t /var/lib/samba/ntp_signd semanage fcontext -a -t chronyd_exec_t

Robert, If your NTP server will be on 7/24, I would uninstall chrony and install ntpd which is still included in CentOS 7. Configure as usual. For the differences between chrony and ntpd reference: http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-between-ntpd-and-chronyd/ Essentially, chrony is more for laptops with intermittant network connections, and ntpd is better suited to

I have read: http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-between-ntpd-and-chronyd/ My server is up all the time and will serve time to internal systems (via DHCP options). Caveat is that my server is an armv7 (Cubieboard2) which does not have an RTC (no battery). So whenever the system boots, the time is ZERO (Dec 31, 1969 or some such). Chrony fixes this really fast;

> > > Forgot to mention, are sure your time sync over AD is working correctly. > One to add to you list, check times of server and clients, (* yes again, > if needed just to be sure). > Yes, I have double check that time is correctly being synced. FYI, Rowland, the process outlined in the wiki for using chronyd does not work on Ubuntu 18.04 (my AD DC is on Ubuntu, but my file

On Sat Feb 10 15:31:47 2024 Mark Foley <mfoley at novatec-inc.com> wrote: > > On Sat, Feb 10, 2024 at 2:20?PM Mark Foley via samba > <samba at lists.samba.org> wrote: > > Does chrony have to be built in some special way to enable ntp-signd? > > Needs to be configured with "--enable-ntp-signd". I may have to build from sources. I downloaded from the

So I have learned that Postfix should delay until Chronyd has moved the system time from 0 to current. What other services need to be delayed? Apache? Bind? Of course if this is a nameserver, Chronyd will probably not be able to resolve the NTP server addresses until Bind is running! thanks

On 05/02/17 16:15, Richard wrote: > >> Date: Sunday, February 05, 2017 10:26:05 -0500 >> From: Robert Moskowitz <rgm at htt-consult.com> >> >> I have read: >> http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-bet >> ween-ntpd-and-chronyd/ >> >> My server is up all the time and will serve time to internal >> systems (via

I just happened to notice this morning in /var/log/messages: chronyd[1299]: Selected source 207.244.103.95 host 207.244.103.95 95.103.244.207.in-addr.arpa domain name pointer dns-e.wdc-us.hosts.301-moved.de. Just curious why my machine in Indiana (USA) is asking for time in Germany. Wouldn't it use something closer ? Thanks, jerry

I have just upgraded my server from CentOS 5 to CentOS 6 and am having connectivity problems. My laptop runs Fedora 14, and I have been in the habit of mounting data partitions on my server by fstab entries. Since the update I've not been able to do that. On watching the messages during a reboot I saw a statement that the connection was denied by the server (where are those messages

> Date: Sunday, February 05, 2017 10:26:05 -0500 > From: Robert Moskowitz <rgm at htt-consult.com> > > I have read: > http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-bet > ween-ntpd-and-chronyd/ > > My server is up all the time and will serve time to internal > systems (via DHCP options). > > Caveat is that my server is an armv7

On 5/23/2015 11:22 PM, Luigi Rosa wrote: > Kirk Bocek wrote on 24/05/2015 04:37: >> So I've built my first CentOS 7 host and am learning all the new ways >> of doing >> things. I setup and enabled ntpd but after a reboot I get: > > In CentOS 7 is bettere to use chrony, here's an howto > > http://linoxide.com/linux-command/chrony-time-sync/ > So

'Modern' NTP allows for all sorts of updates to NTP servers, with all sorts of attacks. So to prevent even local hosts from making changes to your NTP server, there is the restrict instead of allow command. Its intent is to limit what the server will accept from a host in the address range instead of allowing any command from within that range. I use this on my Centos6 servers. I

On Mon, Dec 26, 2016 at 11:04:22PM -0500, Robert Moskowitz wrote: > This is for centos 7 that has chronyd 2.1.1 > > I am looking into how to use chronyd as my local ntp server. > > On my old servers with ntpd I had local access control lines like: > > restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap > > > But in looking for documentation on chronyd I did