Http://www.linuxidc.com/Linux/2010-09/28537.htmThe exchange of date and timestamp under Linux1. Date to timestamp:$ Date-d ' 2009-12-01 23:20 ' +%s 12596808002. Timestamp to date$ Date-d ' 1970-01-01 1259680800 sec UTC ' Tue Dec 1 23:20:00 CST 20093.
The questions I've asked are still being asked by the brothers.
Because REDHAT9 cannot configure the time zone as before. There are often errors without a graphical interface!
Use
/usr/sbin/timeconfig
Errors are as follows
Traceback (most
Part of this article is from: http://hi.baidu.com/peruke/blog/item/b8de06ec6a04583b27979132.htmlThe system is fedora:GLIBC realizes a conversion from RTC time to human readable time, the general system does not apply environment variable TZ to set
Datedate represents a specific moment, accurate to milliseconds. Before JDK1.1, date has two other functions. It allows you to interpret dates as year, month, day, hour, minute, and second values. It also allows formatting and parsing of date
About GMT and UTCFirst, IntroductionMany people know that the two-way schedule is referred to as GMT or UTC, and the World Time Zone table is referred to as universal, so what is the actual intent of GMT and UTC? How is the world time zone
Summary:GMT/UTC/CST;/etc/localtime,/usr/share/zoneinfo/* time zone file,/etc/profile plus TZ variable;Hardware time RTC, system time; date,hwclock,tzselect;NTP relay SERVER;RPM–IVH ntp-*;ntpdate 0.uk.pool.ntp.org; Ntpq–p,watch
Network time Protocol (NTP) is also a new exam requirement for RHCE. Study time also by the way to review how to set up Linux time, now take out and share with youSetting up an NTP server is not difficult, but NTP itself is a very complex protocol.
remark: article reproduced from: http://www.cnblogs.com/liuyou/archive/2012/07/29/2614338.html
Summary:
GMT/UTC/CST;
/etc/localtime,/usr/share/zoneinfo/* time zone file,/etc/profile plus TZ variable;
Hardware time RTC, system time;
On the basis of the Linux system after installation--based on CentOS (5.8/6.4)--we mentioned how to automatically update the server time at timed intervals. Also mentioned, when the number of intranet machines, if all go to the public network NTP
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