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Time zone: Host. What does that mean?


What does XST in the date command output mean?Linux embedded: change time zonentp server problems. It is panicking and then I am 3hours aheadI set time to wrong time zone, how do I change it? (Debian)Incorrect automatic time zoneSetting timezone globally for OpenIndiana Hipster?Dynamic time zone in a running servicestrange time zone abbreviationTime drift and wrong timezone within NTP configurationsystem-wide timezone question -red hat enterprise 7






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








3















I know that there is several ways to setup system timezone on CentOS host.
What I would like to know is the meaning of this Host timezone which seems to be set by default and is reported by timedatectl utility



$timedatectl

Local time: Tue 2019-04-02 13:13:25 CEST
Universal time: Tue 2019-04-02 11:13:25 UTC
RTC time: n/a
Time zone: Host (CEST, +0200)
NTP enabled: n/a
NTP synchronized: yes
RTC in local TZ: no
DST active: yes
Last DST change: DST began at
Sun 2019-03-31 01:59:59 CET
Sun 2019-03-31 03:00:00 CEST
Next DST change: DST ends (the clock jumps one hour backwards) at
Sun 2019-10-27 02:59:59 CEST
Sun 2019-10-27 02:00:00 CET


This Host timezone setting does not seem good enough for particularly java applications when I do define system timezeone to more meaningfull Country/City setting, like this:



$ timedatectl 
Local time: Tue 2019-04-02 13:32:05 CEST
Universal time: Tue 2019-04-02 11:32:05 UTC
RTC time: Tue 2019-04-02 13:32:05
Time zone: Europe/Amsterdam (CEST, +0200)
....


that is used by JVM by setting its user.timezone system property to the same Country/City. If however the Host timezone setting is in effect, JVM does ignore this completely and sets
user.timezone to GMT+01:00 which differs from Host (CEST, +0200)
and confuses me.
Summarizing above



  1. What is the meaning of the timezone named Host?

  2. Why it is not respected by JVM

  3. Once I change timezone to some Country/City, is there a way to reset it back to Host (if that makes sense at all)?









share|improve this question
























  • I think I found some satisfactory answers for my question will publish them later ..

    – Tagwint
    2 days ago

















3















I know that there is several ways to setup system timezone on CentOS host.
What I would like to know is the meaning of this Host timezone which seems to be set by default and is reported by timedatectl utility



$timedatectl

Local time: Tue 2019-04-02 13:13:25 CEST
Universal time: Tue 2019-04-02 11:13:25 UTC
RTC time: n/a
Time zone: Host (CEST, +0200)
NTP enabled: n/a
NTP synchronized: yes
RTC in local TZ: no
DST active: yes
Last DST change: DST began at
Sun 2019-03-31 01:59:59 CET
Sun 2019-03-31 03:00:00 CEST
Next DST change: DST ends (the clock jumps one hour backwards) at
Sun 2019-10-27 02:59:59 CEST
Sun 2019-10-27 02:00:00 CET


This Host timezone setting does not seem good enough for particularly java applications when I do define system timezeone to more meaningfull Country/City setting, like this:



$ timedatectl 
Local time: Tue 2019-04-02 13:32:05 CEST
Universal time: Tue 2019-04-02 11:32:05 UTC
RTC time: Tue 2019-04-02 13:32:05
Time zone: Europe/Amsterdam (CEST, +0200)
....


that is used by JVM by setting its user.timezone system property to the same Country/City. If however the Host timezone setting is in effect, JVM does ignore this completely and sets
user.timezone to GMT+01:00 which differs from Host (CEST, +0200)
and confuses me.
Summarizing above



  1. What is the meaning of the timezone named Host?

  2. Why it is not respected by JVM

  3. Once I change timezone to some Country/City, is there a way to reset it back to Host (if that makes sense at all)?









share|improve this question
























  • I think I found some satisfactory answers for my question will publish them later ..

    – Tagwint
    2 days ago













3












3








3








I know that there is several ways to setup system timezone on CentOS host.
What I would like to know is the meaning of this Host timezone which seems to be set by default and is reported by timedatectl utility



$timedatectl

Local time: Tue 2019-04-02 13:13:25 CEST
Universal time: Tue 2019-04-02 11:13:25 UTC
RTC time: n/a
Time zone: Host (CEST, +0200)
NTP enabled: n/a
NTP synchronized: yes
RTC in local TZ: no
DST active: yes
Last DST change: DST began at
Sun 2019-03-31 01:59:59 CET
Sun 2019-03-31 03:00:00 CEST
Next DST change: DST ends (the clock jumps one hour backwards) at
Sun 2019-10-27 02:59:59 CEST
Sun 2019-10-27 02:00:00 CET


This Host timezone setting does not seem good enough for particularly java applications when I do define system timezeone to more meaningfull Country/City setting, like this:



$ timedatectl 
Local time: Tue 2019-04-02 13:32:05 CEST
Universal time: Tue 2019-04-02 11:32:05 UTC
RTC time: Tue 2019-04-02 13:32:05
Time zone: Europe/Amsterdam (CEST, +0200)
....


that is used by JVM by setting its user.timezone system property to the same Country/City. If however the Host timezone setting is in effect, JVM does ignore this completely and sets
user.timezone to GMT+01:00 which differs from Host (CEST, +0200)
and confuses me.
Summarizing above



  1. What is the meaning of the timezone named Host?

  2. Why it is not respected by JVM

  3. Once I change timezone to some Country/City, is there a way to reset it back to Host (if that makes sense at all)?









share|improve this question
















I know that there is several ways to setup system timezone on CentOS host.
What I would like to know is the meaning of this Host timezone which seems to be set by default and is reported by timedatectl utility



$timedatectl

Local time: Tue 2019-04-02 13:13:25 CEST
Universal time: Tue 2019-04-02 11:13:25 UTC
RTC time: n/a
Time zone: Host (CEST, +0200)
NTP enabled: n/a
NTP synchronized: yes
RTC in local TZ: no
DST active: yes
Last DST change: DST began at
Sun 2019-03-31 01:59:59 CET
Sun 2019-03-31 03:00:00 CEST
Next DST change: DST ends (the clock jumps one hour backwards) at
Sun 2019-10-27 02:59:59 CEST
Sun 2019-10-27 02:00:00 CET


This Host timezone setting does not seem good enough for particularly java applications when I do define system timezeone to more meaningfull Country/City setting, like this:



$ timedatectl 
Local time: Tue 2019-04-02 13:32:05 CEST
Universal time: Tue 2019-04-02 11:32:05 UTC
RTC time: Tue 2019-04-02 13:32:05
Time zone: Europe/Amsterdam (CEST, +0200)
....


that is used by JVM by setting its user.timezone system property to the same Country/City. If however the Host timezone setting is in effect, JVM does ignore this completely and sets
user.timezone to GMT+01:00 which differs from Host (CEST, +0200)
and confuses me.
Summarizing above



  1. What is the meaning of the timezone named Host?

  2. Why it is not respected by JVM

  3. Once I change timezone to some Country/City, is there a way to reset it back to Host (if that makes sense at all)?






centos java timezone






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 days ago









Jeff Schaller

44.6k1162145




44.6k1162145










asked 2 days ago









TagwintTagwint

1,5131816




1,5131816












  • I think I found some satisfactory answers for my question will publish them later ..

    – Tagwint
    2 days ago

















  • I think I found some satisfactory answers for my question will publish them later ..

    – Tagwint
    2 days ago
















I think I found some satisfactory answers for my question will publish them later ..

– Tagwint
2 days ago





I think I found some satisfactory answers for my question will publish them later ..

– Tagwint
2 days ago










1 Answer
1






active

oldest

votes


















0














Personally I have never see that "host" value, do you have this entry when you type:



timedatectl list-timezones | grep -i host


I think no because the only value that not have country/city is "UTC".
And why you don't just use Europe/Amsterdam TZ , it's also in CEST and +2h00 GMT.






share|improve this answer

























  • 1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

    – Tagwint
    2 days ago











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1 Answer
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1 Answer
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active

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active

oldest

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oldest

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0














Personally I have never see that "host" value, do you have this entry when you type:



timedatectl list-timezones | grep -i host


I think no because the only value that not have country/city is "UTC".
And why you don't just use Europe/Amsterdam TZ , it's also in CEST and +2h00 GMT.






share|improve this answer

























  • 1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

    – Tagwint
    2 days ago















0














Personally I have never see that "host" value, do you have this entry when you type:



timedatectl list-timezones | grep -i host


I think no because the only value that not have country/city is "UTC".
And why you don't just use Europe/Amsterdam TZ , it's also in CEST and +2h00 GMT.






share|improve this answer

























  • 1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

    – Tagwint
    2 days ago













0












0








0







Personally I have never see that "host" value, do you have this entry when you type:



timedatectl list-timezones | grep -i host


I think no because the only value that not have country/city is "UTC".
And why you don't just use Europe/Amsterdam TZ , it's also in CEST and +2h00 GMT.






share|improve this answer















Personally I have never see that "host" value, do you have this entry when you type:



timedatectl list-timezones | grep -i host


I think no because the only value that not have country/city is "UTC".
And why you don't just use Europe/Amsterdam TZ , it's also in CEST and +2h00 GMT.







share|improve this answer














share|improve this answer



share|improve this answer








edited 2 days ago









muru

37.2k589164




37.2k589164










answered 2 days ago









MedMed

418




418












  • 1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

    – Tagwint
    2 days ago

















  • 1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

    – Tagwint
    2 days ago
















1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

– Tagwint
2 days ago





1. No the 'Host' timezone is not there in the list. 2. I do use, but just using some known timezone does not answer the question :)

– Tagwint
2 days ago

















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