system time

[Md. Khairul Hasan]

Hi Experts,

I want to change the system time for my IPA server from UTC time to local time. Is it
mandatory to restart the service after changing the system time ?

Regards,
Khairul 

[phone]
sojib2bd(a)gmail.com

[Rob Crittenden]

Md. Khairul Hasan via FreeIPA-users wrote:
>  Hi Experts,
>  
>  I want to change the system time for my IPA server from UTC time to local time. Is it
> mandatory to restart the service after changing the system time ?
>  
IMHO I'd reboot to ensure that all services on the box pick up the new
timezone, things that aren't affected by ipactl (like cron).

Not my area of expertise but I don't know that a running process will
see a TZ change.

rob

[Md. Khairul Hasan]

Thanks for the tip!

On Wed, 9 Jan 2019, 3:57 am Rob Crittenden <rcritten(a)redhat.com wrote:

>  Md. Khairul Hasan via FreeIPA-users wrote:
>  > Hi Experts,
>  >
>  > I want to change the system time for my IPA server from UTC time to
>  local time. Is it mandatory to restart the service after changing the
>  system time ?
>  >
>
>  IMHO I'd reboot to ensure that all services on the box pick up the new
>  timezone, things that aren't affected by ipactl (like cron).
>
>  Not my area of expertise but I don't know that a running process will
>  see a TZ change.
>
>  rob
>

[Md. Khairul Hasan]

Hi Rob,

Thanks for your response .
In my server following service are running . Do you have any idea what's service
depends on system time .

  dirsrv(a)BANGLALINK-NET.service  = 389 Directory Server BANGLALINK-NET.
  httpd.service                  = The Apache HTTP Server
  ipa-custodia.service           = IPA Custodia Service
  kadmin.service                 = Password-changing and Administration
  krb5kdc.service                = Kerberos 5 KDC
  pki-tomcatd(a)pki-tomcat.service = PKI Tomcat Server pki-tomcat
  rpc-gssd.service               =  RPC security service for NFS client and server

[Charles Hedrick]

In Linux, time is always in UTC internally. The time zone controls how time it shown to
users. Changing the time zone thus has no effect on the internal operations of the
servers. It just changes log files and user displays. If you actually reset the time on
the server to local time, Kerberos will fail, unless you do the same thing on all clients,
and even then you’ll have problems with day light savings. So don’t do that. 

>  On Jan 9, 2019, at 5:27 AM, Md. Khairul Hasan via FreeIPA-users
> <freeipa-users(a)lists.fedorahosted.org&gt; wrote:
>  
>  Hi Rob,
>  
>  Thanks for your response .
>  In my server following service are running . Do you have any idea what's service
> depends on system time .
>  
>   dirsrv(a)BANGLALINK-NET.service  = 389 Directory Server BANGLALINK-NET.
>   httpd.service                  = The Apache HTTP Server
>   ipa-custodia.service           = IPA Custodia Service
>   kadmin.service                 = Password-changing and Administration
>   krb5kdc.service                = Kerberos 5 KDC
>   pki-tomcatd(a)pki-tomcat.service = PKI Tomcat Server pki-tomcat
>   rpc-gssd.service               =  RPC security service for NFS client and server
>  _______________________________________________
>  FreeIPA-users mailing list -- freeipa-users(a)lists.fedorahosted.org
>  To unsubscribe send an email to freeipa-users-leave(a)lists.fedorahosted.org
>  Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
>  List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
>  List Archives:
> https://lists.fedorahosted.org/archives/list/[e-mail]...
>