1、查看时区的办法 通过查看时区文件的内容，了解可选择的时区。
ls /usr/share/zoneinfo/ #时区文件的一级分类
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Africa Atlantic Chile Eire Factory GMT-0 Iceland Jamaica localtime Navajo Portugal right Turkey WET
America Australia CST6CDT EST GB GMT0 Indian Japan MET NZ posix ROC UCT W-SU
Antarctica Brazil Cuba EST5EDT GB-Eire Greenwich Iran Kwajalein Mexico NZ-CHAT posixrules ROK Universal zone1970.tab
Arctic Canada EET Etc GMT Hongkong iso3166.tab leap-seconds.list MST Pacific PRC Singapore US zone.tab
Asia CET Egypt Europe GMT+0 HST Israel Libya MST7MDT Poland PST8PDT SystemV UTC Zulu
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ls /usr/share/zoneinfo/Asia/ #时区文件下的二级分类(二进制文件)
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Aden Ashkhabad Beijing Choibalsan Dili Ho_Chi_Minh Jerusalem Khandyga Macau Novokuznetsk Qatar Samarkand Tbilisi Ujung_Pandang Wuhan
Almaty Atyrau Beirut Chongqing Dubai Hong_Kong Kabul Kolkata Magadan Novosibirsk Qostanay Seoul Tehran Ulaanbaatar Xian
Amman Baghdad Bishkek Chungking Dushanbe Hovd Kamchatka Krasnoyarsk Makassar Omsk Qyzylorda Shanghai Tel_Aviv Ulan_Bator Yakutsk
Anadyr Bahrain Brunei Colombo Famagusta Irkutsk Karachi Kuala_Lumpur Manila Oral Rangoon Singapore Thimbu Urumqi Yangon
Aqtau Baku Calcutta Dacca Gaza Istanbul Kashgar Kuching Muscat Phnom_Penh Riyadh Srednekolymsk Thimphu Ust-Nera Yekaterinburg
Aqtobe Bangkok Chengdu Damascus Harbin Jakarta Kathmandu Kuwait Nanjing Pontianak Saigon Taipei Tokyo Vientiane Yerevan
Ashgabat Barnaul Chita Dhaka Hebron Jayapura Katmandu Macao Nicosia Pyongyang Sakhalin Tashkent Tomsk Vladivostok
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2、如何修改时区（redhat系和debian系系统都可以）
ls -l /etc/localtime #查看本地时间信息，确认已知时区
rm -f /etc/localtime #删除本地时间文件
ln -s /usr/share/zoneinfo/Asia/Beijing /etc/localtime #创建软链接到localtime；如果源文件和目的文件写反了，会导致时区文件被覆盖。
ls -l /etc/localtime #再次查看本地时间信息，一般重新创建软连接后，等待10s左右就会更新完成
3、补充 使用ansible来进行批量的时区修改
- name: get timelocal
shell: ls -l /etc/localtime | awk '{print $11}'
register: timelocal
- name: delete loacltime
shell: rm -f /etc/localtime
when: timelocal.stdout != "../usr/share/zoneinfo/Asia/Shanghai"
- name: create asia time
shell: ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
when: timelocal.stdout != "../usr/share/zoneinfo/Asia/Shanghai"
#此处是改成亚洲上海，只展示task