Nastaveni hardwarovych hodin a softwarovych hodin v PC

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HARDWAROVÉ HODINY
Po restartu si systém vezme nastavení z HWclock a pak je třeba o 2 hodiny víc nebo o 10 let míň
Jak nastavit hardwarové hodiny bez vstupu do BIOSu?

Jednoduše, stačí na to dva příkazy, např. 22.9.2006 17:39:
date 092217392006
hwclock --systohc


hwclock --systohc


--systohc set the hardware clock to the current system time
--hctosys set the system time from the hardware clock

SOFTWAROVÉ HODINY
date MMDDhhmm MM DD měsíc-den hh mm hodiny-minuty


  date [OPTION]... [+FORMAT]
  date [-u|--utc|--universal] [MMDDhhmm[[CC]YY][.ss]]

Display the current time in the given FORMAT, or set the system date.

 -d, --date=STRING         display time described by STRING, not `now'
 -f, --file=DATEFILE       like --date once for each line of DATEFILE
 -r, --reference=FILE      display the last modification time of FILE
 -R, --rfc-2822            output date and time in RFC 2822 format
     --rfc-3339=TIMESPEC   output date and time in RFC 3339 format.
                           TIMESPEC=`date', `seconds', or `ns' for
                           date and time to the indicated precision.
 -s, --set=STRING          set time described by STRING
 -u, --utc, --universal    print or set Coordinated Universal Time
     --help     display this help and exit
     --version  output version information and exit

FORMAT controls the output. The only valid option for the second form specifies Coordinated Universal Time. Interpreted sequences are:

 %%   a literal %
 %a   locale's abbreviated weekday name (e.g., Sun)
 %A   locale's full weekday name (e.g., Sunday)
 %b   locale's abbreviated month name (e.g., Jan)
 %B   locale's full month name (e.g., January)
 %c   locale's date and time (e.g., Thu Mar  3 23:05:25 2005)
 %C   century; like %Y, except omit last two digits (e.g., 21)
 %d   day of month (e.g, 01)
 %D   date; same as %m/%d/%y
 %e   day of month, space padded; same as %_d
 %F   full date; same as %Y-%m-%d
 %g   last two digits of year of ISO week number (see %G)
 %G   year of ISO week number (see %V); normally useful only with %V
 %h   same as %b
 %H   hour (00..23)
 %I   hour (01..12)
 %j   day of year (001..366)
 %k   hour ( 0..23)
 %l   hour ( 1..12)
 %m   month (01..12)
 %M   minute (00..59)
 %n   a newline
 %N   nanoseconds (000000000..999999999)
 %p   locale's equivalent of either AM or PM; blank if not known
 %P   like %p, but lower case
 %r   locale's 12-hour clock time (e.g., 11:11:04 PM)
 %R   24-hour hour and minute; same as %H:%M
 %s   seconds since 1970-01-01 00:00:00 UTC
 %S   second (00..60)
 %t   a tab
 %T   time; same as %H:%M:%S
 %u   day of week (1..7); 1 is Monday
 %U   week number of year, with Sunday as first day of week (00..53)
 %V   ISO week number, with Monday as first day of week (01..53)
 %w   day of week (0..6); 0 is Sunday
 %W   week number of year, with Monday as first day of week (00..53)
 %x   locale's date representation (e.g., 12/31/99)
 %X   locale's time representation (e.g., 23:13:48)
 %y   last two digits of year (00..99)
 %Y   year
 %z   +hhmm numeric timezone (e.g., -0400)
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