Linux如何修改和查询时区时间
我在日常工作中，最近遇到了在解压源码包的时候，提示时间比较旧，解压安装出现问题。原因是，租用的vps所在时区和自己所需要的时区不一致，于是在网上找了相关资料。并亲自实践，将其记录如下，以供日后方便使用。
一、时区
参考资料：
# 当前操作系统版本
[root@erwtd ~]# cat /etc/redhat-release
CentOS release 6.9 (Final)
# 1、查看当前时区：东9区
[root@erwtd ~]# date -RMon, 11 Dec 2017 12:16:01 +0900[root@erwtd ~]#
# 2、修改时区
[root@erwtd ~]# tzselectPlease identify a location so that time zone rules can be set correctly.Please select a continent or ocean. 1) Africa 2) Americas 3) Antarctica 4) Arctic Ocean 5) Asia 6) Atlantic Ocean 7) Australia 8) Europe 9) Indian Ocean10) Pacific Ocean11) none - I want to specify the time zone using the Posix TZ format.#? 5Please select a country. 1) Afghanistan 18) Israel 35) Palestine 2) Armenia 19) Japan 36) Philippines 3) Azerbaijan 20) Jordan 37) Qatar 4) Bahrain 21) Kazakhstan 38) Russia 5) Bangladesh 22) Korea (North) 39) Saudi Arabia 6) Bhutan 23) Korea (South) 40) Singapore 7) Brunei 24) Kuwait 41) Sri Lanka 8) Cambodia 25) Kyrgyzstan 42) Syria 9) China 26) Laos 43) Taiwan10) Cyprus 27) Lebanon 44) Tajikistan11) East Timor 28) Macau 45) Thailand12) Georgia 29) Malaysia 46) Turkmenistan13) Hong Kong 30) Mongolia 47) United Arab Emirates14) India 31) Myanmar (Burma) 48) Uzbekistan15) Indonesia 32) Nepal 49) Vietnam16) Iran 33) Oman 50) Yemen17) Iraq 34) Pakistan#? 9Please select one of the following time zone regions.1) Beijing Time2) Xinjiang Time#? 1 The following information has been given: China Beijing Time Therefore TZ='Asia/Shanghai' will be used.Local time is now: Mon Dec 11 11:21:25 CST 2017.Universal Time is now: Mon Dec 11 03:21:25 UTC 2017.Is the above information OK?1) Yes2) No#? 1 You can make this change permanent for yourself by appending the line TZ='Asia/Shanghai'; export TZto the file '.profile' in your home directory; then log out and log in again. Here is that TZ value again, this time on standard output so that youcan use the /usr/bin/tzselect command in shell scripts:Asia/Shanghai[root@erwtd ~]#
#3、复制相应的时区文件，替换系统时区文件
# cp /usr/share/zoneinfo/$主时区/$次时区 /etc/localtime#在中国可以使用：[root@erwtd ~]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
一、时间
#1、查看当前时间
[root@erwtd ~]# dateMon Dec 11 11:28:19 CST 2017[root@erwtd ~]#
#2、设置时间和日期
[root@erwtd ~]# date -s "20171211 11:29:30"Mon Dec 11 11:29:30 CST 2017[root@erwtd ~]# #或者单独修改时间[root@erwtd ~]# date -s 20171220Wed Dec 20 00:00:00 CST 2017[root@erwtd ~]# date -s 11:30:30Wed Dec 20 11:30:30 CST 2017[root@erwtd ~]# dateWed Dec 20 11:30:34 CST 2017[root@erwtd ~]#
#3、保存设置
[root@erwtd ~]# hwclock -w
二、时间同步shell脚本
[root@erwtd ~]#cat /root/ntp.sh #!/bin/bash# ntp.sh#NTP服务器数组列表ntpServer=([0]=1.cn.pool.ntp.org[1]=2.cn.pool.ntp.org[2]=3.cn.pool.ntp.org[3]=0.cn.pool.ntp.org)#校验#serverNum=0NUM=0for ((i=0; i<=$serverNum; i++)); do echo -n "正在和NTP服务器:${ntpServer[$NUM]}校验中..." /usr/sbin/ntpdate ${ntpServer[$NUM]} >> /dev/null 2>&1 if [ $? -eq 0 ]; then echo -e "\e[1;32m\t[成功]\e[0m" echo -e "\e[1;32m同步成功,退出......\e[0m" break else echo -e "\e[1;31m\t[失败]\e[0m" echo -e "\e[1;31m继续同步下一个!!!!!\e[0m" let NUM++ fi sleep 2done[root@erwtd ~]#[root@erwtd ~]# sh /root/ntp.sh 正在和NTP服务器:tw.pool.ntp.org校验中... [成功]同步成功,退出......[root@erwtd ~]#