Friday, September 7, 2012

The most important command in linux is date. We can manipulate date commands output as we want. Suppose we need today's date as dd/mm/yyyy then we can implement like this:
Type command:
-bash-3.00$  date "+%d/%m/%Y"
07/09/2012

If you want current timestamp as yyyymmddHHMMSS then we can get it as:
-bash-3.00$ date "+%Y%m%d%H%M%S"
20120907080135

Date command prints or sets the system date and time. You can use following characters to get required result :
%%     a literal %
 %a     localeâs abbreviated weekday name (Sun..Sat)
 %A     localeâs full weekday name, variable length (Sunday..Saturday)
 %b     localeâs abbreviated month name (Jan..Dec)
 %B     localeâs full month name, variable length (January..December)
 %c     localeâs date and time (Sat Nov 04 12:02:33 EST 1989)
 %C     century (year divided by 100 and truncated to an integer) [00-99]
 %d     day of month (01..31)
 %D     date (mm/dd/yy)
 %e     day of month, blank padded ( 1..31)
 %F     same as %Y-%m-%d
 %g     the 2-digit year corresponding to the %V week number
 %G     the 4-digit year corresponding to the %V week number
 %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 upper case AM or PM indicator (blank in many locales)
 %P     localeâs lower case am or pm indicator (blank in many locales)
%r     time, 12-hour (hh:mm:ss [AP]M)
 %R     time, 24-hour (hh:mm)
 %s     seconds since â00:00:00 1970-01-01 UTCâ (a GNU extension)
 %S     second (00..60); the 60 is necessary to accommodate a leap second
 %t     a horizontal tab
 %T     time, 24-hour (hh:mm:ss)
 %u     day of week (1..7);  1 represents Monday
 %U     week number of year with Sunday as first day of week (00..53)
 %V     week number of year with Monday as first day of week (01..53)
 %w     day of week (0..6);  0 represents Sunday
 %W     week number of year with Monday as first day of week (00..53)
 %x     localeâs date representation (mm/dd/yy)
 %X     localeâs time representation (%H:%M:%S)
 %y     last two digits of year (00..99)
 %Y     year (1970...)
 %z     RFC-2822 style numeric timezone (-0500) (a nonstandard extension)
 %Z     time zone (e.g., EDT), or nothing if no time zone is determinable

If you have any doubts regarding date command then write to me in comment.
Posted by Machindra Dharmadhikari On 9/07/2012 05:45:00 PM No comments

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