Funny and cool Linux tips
1337 or Leet in the UNIX time.
-01:44:57-- gordon@deusexmachina [~]$ date +%s 1337096699 |
The missing days in 1752. I have mentioned this before, but it is worth mentioning again.
-01:45:31-- gordon@deusexmachina [~]$ cal 9 1752 September 1752 Su Mo Tu We Th Fr Sa 1 2 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 |
A couple of visitors to my website wanted to know about the time() function in time.h, so here is a simple C program for printing a verbose time and date.
#include <time.h> /* For time function (random seed). */ #include <stdio.h> /* For extra functions. printf(). */ #include <stdlib.h> /* For getenv(); */ #define format "The time and date is: %A %d %B %Y. The time is: %H:%M:%S, %Z." int print_time(void) { struct tm *ptr; time_t tm; char length[60]; tm = time(NULL); ptr = localtime(&tm); strftime(length, 100, format, ptr); printf("%s\n", length); } int main(void) { print_time(); return 0; } |
And another version with colored output for the Linux terminal.
#include <time.h> #include <stdio.h> #include <stdlib.h> #define format "The time and date is: %A %d %B %Y. The time is: %H:%M:%S, %Z." int main(void) { struct tm *ptr; time_t tm; char length[60]; char *logname; tm = time(NULL); ptr = localtime(&tm); // UNIX Epoch. strftime(length, 100, format, ptr); logname = getenv("LOGNAME"); /* * Formatting the strftime string. */ printf("\E[1;33m--Welcome %s.\E[0m\n", logname); printf("\E[1;32m--%s\E[0m\n", length); printf("--There have been %i seconds since Epoch.\n", tm); return 0; } |