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Linux time zone details and common time functions time and time zone The entire earth is divided into 24 time zones, each time zone has its own local time. ø UTC Time and GMT time We can think of Greenwich Mean Time (GMT = UTC), GMT and
Linux/unix-time timestamp processing conversion functionThe time function under LinuxWe can often use time in programming, such as getting the system time (to get the system's year, month, day, hour, minute, second, week, etc.), or to do something
01. Time () provides second-level precision02.03.1 header file 04.2 function prototype05. time_t time (time_t * timer)06. The function returns the number of seconds from TC1970-1-1 0: 0 to the present07.08. Use the time () function combined with
First, the Linux common time correlation function-asctime,ctime,getttimeofday,gmtime,localtime,mktime,settimeofday,timeAsctime: Converting dates to stringsCTime: Converts a number of seconds into a stringGettimeofday: Gets the time and date based on
Function category:1. Set the time: settimeofday, tzset2. Get time: time, ftime, gettimeofday3. Time Format Conversion: mktime, strftime; gmtime, localtime; asctime, ctime4. Others: Clock, difftime
Asctime: represents the time and date in string
Linux ntp time server configuration tutorial, ntp server configuration
Network Time Protocol (NTP) is also a new test requirement for RHCE. During study, I also reviewed how to set the Linux Time. Now I will share it with you.
It is not difficult
Date and time (asctimectimegettimeofdaygmtimelocaltimemktimesettimeofdaytimeasctime (expressed in string format) related functions time, ctime, gmtime, localtime header file # include & lt; time. h & gt; define the function char * ascti
Date and
Date and Time
Asctime
Ctime
Gettimeofday
Gmtime
Localtime
Mktime
Settimeofday
Time
Asctime (represents the time and date in string format)
Related functions
Time, ctime, gmtime, localtime
Header file
# Include
Define functions
Char * asctime
precise timing in microseconds
Long Long l1,l2,l3;
Timeval TV1;
Take a Time
Gettimeofday (&tv,null);
L1 = tv.tv_sec*1000*1000 + tv.tv_usec;
Execute some code, such as algorithm 1 ...
Second time taken
Gettimeofday (&tv,null);
L2 = tv.tv_sec*1000*1
Asctime (represents the time and date in string format)
Related functions
Time, ctime, gmtime, localtime
Header file
# Include
Define functions
Char * asctime (const struct TM * timeptr );
Function
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