Como posso examinar o conteúdo de / etc / localtime?

Question

Que comando (s) posso usar para examinar o conteúdo dos arquivos de fuso horário, como /etc/localtime ou os arquivos em /usr/share/zoneinfo/* ?

    

Answer 1

O comando mais apropriado parece ser zdump .

$ zdump /etc/localtime 
/etc/localtime  Wed Aug  7 23:52:25 2013 EDT

$ zdump /usr/share/zoneinfo/* | tail -10
/usr/share/zoneinfo/Singapore    Thu Aug  8 11:52:48 2013 SGT
/usr/share/zoneinfo/Turkey       Thu Aug  8 06:52:48 2013 EEST
/usr/share/zoneinfo/UCT          Thu Aug  8 03:52:48 2013 UCT
/usr/share/zoneinfo/Universal    Thu Aug  8 03:52:48 2013 UTC
/usr/share/zoneinfo/US           Thu Aug  8 03:52:48 2013
/usr/share/zoneinfo/UTC          Thu Aug  8 03:52:48 2013 UTC
/usr/share/zoneinfo/WET          Thu Aug  8 04:52:48 2013 WEST
/usr/share/zoneinfo/W-SU         Thu Aug  8 07:52:48 2013 MSK
/usr/share/zoneinfo/zone.tab     Thu Aug  8 03:52:48 2013
/usr/share/zoneinfo/Zulu         Thu Aug  8 03:52:48 2013 UTC

Você também pode interrogar esses arquivos usando o comando file :

$ file /etc/localtime 
/etc/localtime: timezone data, version 2, 4 gmt time flags, 4 std time flags, no leap seconds, 235 transition times, 4 abbreviation chars

$ file /usr/share/zoneinfo/Singapore
/usr/share/zoneinfo/Singapore: timezone data, version 2, 8 gmt time flags, 8 std time flags, no leap seconds, 8 transition times, 8 abbreviation chars

    

Answer 2

Tente o tzdump. Eu encontrei aqui: link É um programa em C e, portanto, precisará ser compilado.

    

Answer 3

Etapas:

1. Primeiro, verifique a hora local do contêiner docker:

   [root@locdb oracle]# zdump /etc/localtime
   /etc/localtime  Tue May 22 13:59:40 2018 UTC
   

2. Verifique os fusos horários como abaixo:

   [root@locdb oracle]# zdump /usr/share/zoneinfo/* | tail -10
   /usr/share/zoneinfo/UTC          Tue May 22 14:01:21 2018 UTC
   /usr/share/zoneinfo/Universal    Tue May 22 14:01:21 2018 UTC
   /usr/share/zoneinfo/W-SU         Tue May 22 17:01:21 2018 MSK
   /usr/share/zoneinfo/WET          Tue May 22 15:01:21 2018 WEST
   /usr/share/zoneinfo/Zulu         Tue May 22 14:01:21 2018 UTC
   /usr/share/zoneinfo/iso3166.tab  Tue May 22 14:01:21 2018
   /usr/share/zoneinfo/posix        Tue May 22 14:01:21 2018
   /usr/share/zoneinfo/posixrules   Tue May 22 10:01:21 2018 EDT
   /usr/share/zoneinfo/right        Tue May 22 14:01:21 2018
   /usr/share/zoneinfo/zone.tab     Tue May 22 14:01:21 2018
   

3. Copie o que você precisa por exemplo:

   cp  /usr/share/zoneinfo/UTC /etc/localtime
   

Answer 4

Na verdade, qualquer coisa pode ser examinada por strings:

# strings /etc/localtime