change date and time linux
============ Treating with date command =================
1> date 081811002007 [mmddhhmmyyyy]--To set the Linux clock to 11th-Aug-2007-11-AM
2> timeconfig --Set your TIMEZONE
3> hwclock --hc to sys--->-->To set the Linux[system]clock from the HW clock
4> hwclock --utc sys to hc -->To set the HWclock from the Linux[system] clock
touch -t yyyymmddhhmm filename
echo "DATE:" `date --date "today" +%d-%m-%Y` <--DATE:20-12-2010
echo "DATE:" `date --date "yesterday" +%d-%m-%Y`
echo "DATE:" `date --date "+5 minutes ago" +%d-%m-%Y-%M` <--present -5 min
echo "DATE:" `date --date "-5minutes ago" +%d-%m-%Y-%M` <---Present +5 min
echo "DATE:" `date --date "1 month ago -5 minutes ago" +%d-%m-%Y-%M`
<--present -1 month +5 min
Some importnat journal use paramiters
%a --> Mon
%b --> Jan
%d --> date 01..31 %e --> 1..31
%H --> hour 0..23) %k --> 1..23
%M --> minute (00..59)
%S --> Seconds(00..60)
%I --> hour 00..12) %m --> 1-12
%Y --> year 2010 %y --> year 10(last 2 digit)
%p --> AM-PM %p --> am-pm
%T --> %H:%M:%S
=================================== More n more ==================
%%--->a literal %
%a--->localeâs abbreviated weekday name (e.g., Sun)
%A--->localeâs full weekday name (e.g., Sunday)
%b--->localeâs abbreviated month name (e.g., Jan)
%B--->localeâs full month name (e.g., January)
%c--->localeâs 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--->localeâs equivalent of either AM or PM; blank if not known
%P--->like %p, but lower case
%r--->localeâs 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--->localeâs date representation (e.g., 12/31/99)
%X--->localeâs time representation (e.g., 23:13:48)
%y--->last two digits of year (00..99)
%Y--->year
%z--->+hhmm numeric timezone (e.g., -0400)
%:z -> +hh:mm numeric timezone (e.g., -04:00)
%::z -> +hh:mm:ss numeric time zone (e.g., -04:00:00)
%:::z -> numeric time zone with : to necessary precision (e.g., -04, +05:30)
%Z -> alphabetic time zone abbreviation (e.g., EDT)
### Other usefull operation with date command
# date --date="next Monday"
# date --date="10 days ago"
##### Yesterday
# date --date="yesterday" --OR--#
date --date="-1 day"##### Tomorrow
# date --date="next day" --OR--
# date --date="-1 days ago"
# date --date='tomorrow'
##### After n Day/week/month/year
# date --date='101 day'
# date --date='101 week'
# date --date='101 month'
# date --date='101 year'
### Similarly Before n Day/week/month/year Ago
# date --date='101 day ago'
# date --date='101 week ago'
# date --date='101 month ago'
# date --date='101 year ago'
##### 10 hours ago
# date --date='10 hour ago'
##### After 10 hours
# date --date='10 hour' --OR--
# date --date=-'10 hour ago' <-- Same applicable for all
##### 10 minutes ago
# date --date='10 minutes ago'
##### 10 seconds ago
# date --date=-'10 seconds ago'
##### Print date after 1 day 5 hour
# date --date='1 day 5 hour'
# date --date='-1 day -5 hour ago'
# Faced any problem Feedback in above contact me
#============================Scratch==============================#
# AND Many More .....................Linux is Endless #
#========================== Hope you Liked IT =======================#
# CMDS DATE-- BY Shirish Shukla #
# RHC Engineer 2010 #
# shirish.linux@gmail.com #
# shirishlinux.blogspot.com #
# "Give Respect To Time One Day At Right Time, Time Will Respect You" #
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# TRy Hard theres nothing that are un-achievable by HARDdd-WORKkk #
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