113 lines
4.1 KiB
Plaintext
113 lines
4.1 KiB
Plaintext
utc: convert times to UTC
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Usage: utc [-f format] [-o format] [-q] [-t] [-u] [-z zone] [time(s)...]
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utc -h | utc help
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utc converts times to UTC. If no arguments are provided, prints the
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current time in UTC. If the only argument provided is "-", utc reads
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newline-separated timestamps from standard input. If the argument is
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"help", it will print an extended help message with examples. If both
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the input and output timezones are the same (e.g., the local time zone
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is UTC), a warning message will be printed on standard error. This can
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be suppressed with the -q option.
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Flags:
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-f format Go timestamp format for input times. See the Go docs
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(e.g. https://golang.org/pkg/time/#pkg-constants)
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for an explanation of this format.
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Default value: 2006-01-02 15:04
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-h Print this help message.
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-o format Go timestamp format for outputting times.
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It uses the same format as the '-f' argument.
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Default value: 2006-01-02 15:04 MST
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-q Suppress the timezone check warning message.
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-t Input times are Unix timestamps. Use with
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-u to convert the timestamp to the timezone
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specified by the -z option (which defaults
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to Local).
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-u Timestamps are in UTC format and should be
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converted to the timezone specified by the
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-z argument (which defaults to 'Local'). Note
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that this isn't particularly useful with
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no arguments.
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-z zone Text form of the time zone; this can be in short
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time zone abbreviation (e.g. MST) or a
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location (e.g. America/Los_Angeles). This
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has no effect when printing the current
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time.
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Default value: Local
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Examples (note that the examples are done in the America/Los_Angeles /
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PST8PDT time zone):
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+ Getting the current time in UTC:
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$ utc
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2016-06-14 14:30 PDT = 2016-06-14 21:30 UTC
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+ Converting a local timestamp to UTC:
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$ utc '2016-06-14 21:30'
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2016-06-14 21:30 PDT = 2016-06-15 04:30 UTC
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+ Converting a local EST timestamp to UTC (on a machine set to
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PST8PDT):
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$ utc -z EST '2016-06-14 21:30'
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2016-06-14 21:30 EST = 2016-06-15 02:30 UTC
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+ Converting timestamps in the form '14-06-2016 3:04PM':
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$ utc -f '02-01-2006 3:04PM' '14-06-2016 9:30PM'
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2016-06-14 21:30 PDT = 2016-06-15 04:30 UTC
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+ Converting timestamps from standard input:
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$ printf "2016-06-14 14:42\n2016-06-13 11:01" | utc -
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2016-06-14 14:42 PDT = 2016-06-14 21:42 UTC
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2016-06-13 11:01 PDT = 2016-06-13 18:01 UTC
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+ Converting a UTC timestamp to the local time zone:
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$ utc -u '2016-06-14 21:30'
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2016-06-14 21:30 UTC = 2016-06-14 14:30 PDT
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+ Converting a UTC timestamp to EST (on a machine set to
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PST8PDT):
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$ utc -u -z EST '2016-06-14 21:30'
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2016-06-14 21:30 UTC = 2016-06-14 16:30 EST
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+ Using a different output format:
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$ utc -o '2006-01-02T15:03:04-0700' '2016-06-14 21:30'
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2016-06-14T21:09:30-0700 = 2016-06-15T04:04:30+0000
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+ Converting a Unix timestamp to a UTC time:
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$ utc -t 1466052938
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2016-06-15 21:55 PDT = 2016-06-16 04:55 UTC
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+ Converting a Unix timestamp to local time:
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$ utc -t -u 1466052938
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2016-06-16 04:55 UTC = 2016-06-15 21:55 PDT
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+ Converting a Unix timestamp to EST:
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$ utc -t -u -z EST 1466052938
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2016-06-16 04:55 UTC = 2016-06-15 23:55 EST
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+ Example of the warning message when running utc on a machine
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where the local time zone is UTC:
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$ utc
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==================================================================
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Note: both input and output timezone offsets are the same --- this
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program may not do what you expect it to.
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(Converting from UTC (offset +0000) to UTC (offset +0000).)
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==================================================================
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2016-06-14 23:44 = 2016-06-14 23:44
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+ Example of the warning message when running utc on a machine
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where the local time zone is GMT:
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$ utc
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==================================================================
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Note: both input and output timezone offsets are the same --- this
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program may not do what you expect it to.
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(Converting from GMT (offset +0000) to UTC (offset +0000).)
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==================================================================
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2016-06-14 23:46 = 2016-06-14 23:46
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