hp-ux 修改系統時間

<!--StartFragment --> hp-ux修改系統時間 簡單舉一例子如下： date -u  1016102115 date [-u] [mmddhhmm[[cc]yy]] 以上時間修改為2015年10月16日10：21 以下是man date 資訊，可參考其他參數： # man date  date(1)                                                             date(1)  NAME

      date - display or set the date and time  SYNOPSIS

      date [-u]       date [-u] +format       date [-u] [mmddhhmm[[cc]yy]]       date [-a [-]sss[.fff]]  DESCRIPTION

      The date command displays or sets the current HP-UX system clock date

      and time.  Since the HP-UX system operates in Coordinated Universal

      Time (UTC), date automatically converts to and from local standard or

      daylight/summer time, based on your TZ environment variable.  See

      Environment Variables in EXTERNAL INFLUENCES below.     Options

      date recognizes the following option:            -u   Input and output values in Coordinated Universal Time (UTC),

                functionally equivalent to Greenwich Mean Time (GMT),

                instead of in local time.            -a [-]sss[.fff]

                Slowly adjust the time by sss.fff seconds (fff represents

                fractions of a second).  This adjustment can be positive or

                negative.  The system's clock will be sped up or slowed down

                until it has drifted by the number of seconds specified.     Formats

      The date command has two forms for displaying the date and time and

      one form for setting them.            date [-u]                    Display the current date and time.  The output is the

                   same as for the %c formatting directive for all languages

                   except the C default language.  See Formatting Directives

                   and EXAMPLES below.            date [-u] +format                    Display the current date and time according to formatting

                   directives specified in format, which is a string of zero

                   or more formatting directives and ordinary characters.

                   If it contains blanks, enclose it in apostrophes or

                   quotation marks.  Hewlett-Packard Company            - 1 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)                    See Formatting Directives below.                    All ordinary characters are copied unchanged into the

                   output string.                    The output string is always terminated with a newline

                   character.                    If + is specified and format is omitted, only a newline

                   is output.            date [-u] [mmddhhmm[[cc]yy]]                    Set the HP-UX system clock to the date and time

                   specified.  You require the superuser privilege.                    If you include the -u option, the specified date and time

                   is assumed to be in Coordinated Universal Time (UTC).                    The numeric argument is interpreted left to right in

                   two-digit pairs as follows:                         mm   Month number [01-12].

                        dd   Day number in the month [01-31].

                        hh   Hour number (24-hour system) [00-23].

                        mm   Minute number [00-59].

                        cc   Century minus one [19-20].

                        yy   Last two digits of the year number [70-99, 00-

                             37 (1970-1999, 2000-2037)].  If omitted, the

                             current year is used.                    If you attempt to set the date backwards, date generates

                   the warning,                         do you really want to run time backwards?[yes/no]                    Type yes or the equivalent for your locale to set the

                   clock backwards; anything else to cancel the command.                    When date is used to set the date, a pair of date change

                   records is written to the file /var/adm/wtmps.                    (UNIX Standard only, see standards(5).) No warning is

                   generated if date is set backwards.  Hewlett-Packard Company            - 2 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)     Formatting Directives

      The following formatting directives, shown without the optional field

      width and precision specification, are replaced by the indicated

      characters.  If a directive is not one of the following, the result is

      undefined.       The output for digits, characters, and words depends on the

      language/locale settings.  See Environment Variables in EXTERNAL

      INFLUENCES below.       The examples assume that the date command was executed on Wednesday,

      January 12, 1994 at 7:45:58 p.m. Pacific Standard Time, using the C

      default language.            %a   Abbreviated weekday name.  For example, Wed.            %A   Full weekday name.  For example, Wednesday.            %b   Abbreviated month name.  For example, Jan.            %B   Full month name.  For example, January.            %c   Current date and time representation.  For example, Wed Jan

                12 19:45:58 1994.            %C   Century (the year divided by 100 and truncated to an

                integer) as a two-digit decimal number [00-99].  For

                example, 19.            %d   Day of the month as a two-digit decimal number [01-31].  For

                example, 12.            %e   Day of the month as a two-character decimal number with

                leading space fill [" 1"-"31" ].  For example, 12.            %E   Combined Emperor/Era name and year.            %H   Hour (24-hour clock) as a two-digit decimal number [00-23].

                For example, 19.            %I   Hour (12-hour clock) as a two-digit decimal number [01-12].

                For example, 07.            %j   Day of the year as a three-digit decimal number [001-366].

                For example, 012.            %m   Month as a decimal two-digit number [01-12].  For example,

                01.            %M   Minute as a decimal two-digit number [00-59].  For example,

                45.  Hewlett-Packard Company            - 3 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)            %n   Newline character.            %N   Emperor/Era name.            %o   Emperor/Era year.            %p   Equivalent of either AM or PM.  For example, PM.            %R   Time as %H:%M            %S   Second as a two-digit decimal number (allows for possible

                leap seconds) [00-61].  For example, 58.            %t   Tab character.            %u   Weekday as a one-digit decimal number [1-7 (Monday-Sunday)].

                For example, 3.            %U   Week number of the year (Sunday as the first day of the

                week) as a two-digit decimal number [00-53].  All days that

                precede the first Sunday in the year are considered to be in

                week 00.  For example, 02.            %V   Week number of the year (Monday as the first day of the

                week) as a two-digit decimal number [01-53].  If the week

                containing January 1 has four or more days in the new year

                (January 1 is Thursday or sooner), it is designated as week

                01; otherwise, (January 1 is Friday or later), it is

                designated as the last week of the previous year, and the

                next week is week 01.  For example, 02.            %w   Weekday as a one-digit decimal number [0-6 (Sunday-

                Saturday)].  For example, 3.            %W   Week number of the year (Monday as the first day of the

                week) as a two-digit decimal number [00-53].  All days that

                precede the first Monday in the year are considered to be in

                week 00.  For example, 02.            %x   Current date representation.  For example, 01/12/94.            %X   Current time representation.  For example, 19:45:58.            %y   Year without century as a two-digit decimal number [00-99].

                For example, 93.            %Y   Year with century as a four-digit decimal number [1970-

                2037].  For example, 1994.            %Z   Time zone name (or no characters if time zone cannot be

                determined).  For example, PST.  Hewlett-Packard Company            - 4 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)            %%   The % character.     Obsolescent Directives

      The following directives are provided for backward compatibility.  It

      is recommended that the preceding directives be used instead.            %D   Date in usual U.S. format.  For example, 01/12/94.  Use %x

                or %m/%d/%y instead.            %F   Full month name.  For example, January.  Use %B instead.            %h   Abbreviated month name.  For example, Jan.  Use %b instead.            %r   Time in 12-hour U.S. format.  For example, 07:45:58 PM.  Use

                "%I:%M:%S %p" instead.            %T   Time in 24-hour U.S. format.  For example, 19:45:58.  Use %X

                or %H:%M:%S instead.            %z   Time zone name (or no characters if time zone cannot be

                determined).  For example, PST.  Use %Z instead.     Modified Formatting Directives

      Some Formatting Directives can be modified by the E and O modifier

      characters to indicate a different format or specification for the

      language specified in the LC_TIME environment variable.       If the corresponding keyword (era, era_year, era_d_fmt, and alt_digit)

      is not specified or not supported, the unmodified field descriptor

      value is used.  The command            LC_ALL=language locale -ck era era_year era_d_fmt alt_digit       displays the keywords and their values in the specified language (see

      locale(1)).            %Ec       Alternate appropriate date and time representation.            %EC       The name of the base year in alternate representation.            %Ex       Alternate date representation.            %Ey       Offset from %EC (year only) in the alternate

                     representation.            %EY       Full alternate year representation.            %Od       Day of month using the alternate numeric symbols.            %Oe       Day of month using the alternate numeric symbols with

                     leading space-character fill if applicable.  Hewlett-Packard Company            - 5 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)            %OH       Hour (24-hour clock) using the alternate numeric

                     symbols.            %OI       Hour (12-hour clock) using the alternate numeric

                     symbols.            %Om       Month using the alternate numeric symbols.            %OM       Minutes using the alternate numeric symbols.            %OS       Seconds using the alternate numeric symbols.            %OU       Week number of the year (Sunday is the first day of the

                     week) using the alternate numeric symbols.            %Ow       Weekday as number using the alternate numeric symbols

                     (Sunday=0).            %OW       Weekday number of the year (Monday is the first day of

                     the week) using the alternate numeric symbols.            %Oy       Year (offset from %C) in alternate representation.     Field Width and Precision

      An optional field width and precision specification can immediately

      follow the initial % of a formatting directive in the following order:            [-|0]width  The decimal digit string width specifies a minimum

                       field width in which the result of the conversion is

                       right- or left-justified.  The default is right-

                       justified with space padding on the left.  If the

                       string starts with "-", the result is left-justified

                       with space padding on the right.  If the string

                       starts with "0", the result is right-justified and

                       padded with zeros on the left.            .prec       The decimal digit string prec specifies the minimum

                       number of digits to appear for the d, H, I, j, m, M,

                       o, S, U, w, W, y, and Y numeric directives.  If a

                       directive supplies fewer digits than specified by the

                       precision, it will be expanded with leading zeros.                        prec specifies the maximum number of characters to be

                       used from the a, A, b, B, c, D, E, F, h, n, N, p, r,

                       t, T, x, X, z, Z, and % text directives.  If a

                       directive supplies more characters than specified by

                       the precision, excess characters are truncated on the

                       right.       If no field width or precision is specified for a d, H, I, m, M, S, U,

      W, or y directive, the default is .2; for the j directive, the default  Hewlett-Packard Company            - 6 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)       is .3; for Y, the default is .4; for w, the default is .1.  EXTERNAL INFLUENCES

      For information about the UNIX Standard environment, see standards(5).     Environment Variables

      LC_CTYPE determines the interpretation of the bytes within the format

      string as single- and/or multi-byte characters.       LC_NUMERIC determines the characters used to form numbers for those

      directives that produce numbers in the output.  The characters used

      are those defined by alt_digit (see locale(1) and ALT_DIGIT in

      langinfo(5)).       LC_TIME determines the content (for example, the weekday names

      produced by the %a directive) and format (for example, the current

      time representation produced by the %X directive) of date and time

      strings output by the date command.       LC_MESSAGES determines the language in which messages (other than the

      date and time strings) are displayed.       If LC_CTYPE, LC_NUMERIC, LC_TIME, or LC_MESSAGES is not specified or

      is null, it defaults to the value of LANG.       If LANG is not specified or is null, it defaults to C (see lang(5)).       If any internationalization variable contains an invalid setting, all

      internationalization variables default to C (see environ(5)).       TZ determines the conversion between the system time in UTC and the

      time in the user's local time zone.  See environ(5) and tztab(4).  TZ

      also determines the content (that is, the time-zone name produced by

      the %z and %Z directives) of date and time strings output by the date

      command.       If TZ is not set or is set to the empty string, its default value is

      EST5EDT.  If the EST5EDT or the TZ value cannot be read from the time

      zone adjustment table tztab, then date returns the time in UTC.     International Code Set Support

      Single and multibyte character code sets are supported.  DIAGNOSTICS

      The following messages may be displayed.       bad conversion               The date/time specification is syntactically incorrect.  Check

              it against the usage and for the correct range of each of the  Hewlett-Packard Company            - 7 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)               digit-pairs.       bad format character - c               The character c is not a valid format directive, field width

              specifier, or precision specifier.       do you really want to run time backwards?[yes/no]               The date/time you specified is earlier than the current clock

              value.  Type yes (or the equivalent for your locale) to set

              the clock backwards; anything else to cancel the command.       no permission               You need the superuser privilege to change the date.  EXAMPLES

    Date in Different Languages

      Display the date.  In this example, the TZ environment variable

      contains PST8PDT, and the language environment variables are set as

      noted.       date    -> Fri Aug 20 15:03:37 PDT 1993  <- C (default)

      date -u -> Fri Aug 20 22:03:37 UTC 1993  <- C (default)

      date    -> Fri, Aug 20, 1993 03:03:37 PM <- en_US.roman8 (U.S. English)

      date    -> Fri. 20 Aug, 1993 03:03:37 PM <- en_GB.roman8 (U.K. English)

      date    -> 20/08/1993 15.47.47           <- pt_PT.roman8 (Portuguese)     Set Date

      Set the date to Oct 8, 12:45 a.m.            date 10080045     Display Formatted Date

      Display the current date and time using a format.  Note the use of

      quotation marks due to the blanks in the format.            date "+DATE: %m/%d/%y%nTIME: %H:%M:%S"       The output resembles the following:            DATE: 10/08/87

           TIME: 12:45:05     Display Formatted Date Using Local Language Conversion

      With the date as set in the "Set Date" example above and LC_TIME set

      to de_De.roman8 (German):            date +'%-4.4h %2.1d %H:%M'  Hewlett-Packard Company            - 8 -       HP-UX 11i Version 3 Feb 2007  date(1)                                                             date(1)       generates output similar to:            Okt   8 12:45       where the month field is four characters long, flush-left, and space-

      padded on the right if the month name is shorter than four characters.

      The day field is two characters long, with leading zeros suppressed.  WARNINGS

      The former HP-UX format directive A has been changed to W for ANSI

      compatibility.       Changing the date while the system is running in multiuser mode should

      be avoided to prevent disrupting user-scheduled and time sensitive

      programs and processes.  Also, changing the date can cause make and

      the SCCS and cron subsystems to behave in an unexpected manner.  The

      cron daemon should be killed prior to setting the date backwards, then

      restarted.  SCCS files should be checked with the val command (see

      val(1)) if deltas have been made while the clock was wrongly set.       The following formatting directives may be deleted from future

      releases: %E, %F, %o, %z.       Currently, the maximum date supported is December 31, 2037 23:59:00

      UTC.  AUTHOR

      date was developed by AT&T and HP.  FILES

      /var/adm/wtmps  SEE ALSO

      locale(1), stime(2), ctime(3C), strftime(3C), tztab(4), environ(5),

      lang(5), langinfo(5), standards(5).  STANDARDS CONFORMANCE

      date: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2  Hewlett-Packard Company            - 9 -       HP-UX 11i Version 3 Feb 2007