从 bash 脚本获取十六进制时间戳
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Get hex time stamp from bash script
提问by John
I would like to convert the current date and time into a hex time stamp, something like:
我想将当前日期和时间转换为十六进制时间戳，例如：
Tue Feb 2 10:27:46 GMT 2010 converted into 0x6d054a874449e
2010 年 2 月 2 日星期二 10:27:46 GMT 转换为 0x6d054a874449e
I would like to do this from a bash script, any idea how I might do that?
我想从 bash 脚本中执行此操作，知道如何执行此操作吗？
Thanks J
谢谢 J
回答by mob
printf '0x%x' $(date +%s)
回答by Matthew Slattery
Without knowing the unit or epoch for your hex timestamp, it's hard to say for sure (and I was slightly confused by your example of "Feb 2" which is not even close to the current date!).
在不知道十六进制时间戳的单位或纪元的情况下，很难确定（而且我对您的“2 月 2 日”示例感到有些困惑，它甚至不接近当前日期！）。
date +%swill convert the current date into a time_t, the number of seconds since the usual Unix epoch (which is midnight on 1st Jan 1970).
date +%s将当前日期转换为time_t自通常的 Unix 纪元（即 1970 年 1 月 1 日午夜）以来的秒数。
printf "0x%x" some_numberwill convert a value from decimal to hex.
printf "0x%x" some_number将一个值从十进制转换为十六进制。
If you need to convert to a different epoch / unit, you will need to do some calculation. You can do arithmetic in bashusing $(( expression )):
如果您需要转换为不同的纪元/单位，则需要进行一些计算。您可以bash使用$(( expression ))以下方法进行算术运算：
$ time_t=$(date +%s)
$ echo $(($time_t * 1000))
1284505668000
If you want to convert an arbitrary date (like your "Feb 2 ..." example), rather than the current one, and are happy to assume that you have the GNU version of date, then you can use the -doption along with the +%soutput format to do the conversion:
如果您想转换任意日期（例如您的“Feb 2 ...”示例），而不是当前日期，并且很高兴假设您拥有 GNU 版本date，那么您可以使用该-d选项和+%s输出格式进行转换：
$ date -d 'Tue Feb 2 10:27:46 GMT 2010' +%s
1265106466
An example of putting this all together:
将所有这些放在一起的示例：
$ time_t=$(date -d 'Tue Feb 2 10:27:46 GMT 2010' +%s)
$ time_t_ms=$(($time_t * 1000))
$ hexstamp=$(printf "0x%x" $time_t_ms)
$ echo $hexstamp
0x1268e38b4d0
回答by roblogic
Seconds since unix epoch, in hex:
Unix 纪元以来的秒数，以十六进制表示：
echo "$(date +%s)"|xargs printf "0x%x"
0x59a8de5b
Milliseconds since the epoch:
自纪元以来的毫秒数：
echo "$(date +%s%N)/1000000"|bc|xargs printf "0x%x"
0x15e3ba702bb
Microseconds:
微秒：
echo "$(date +%s%N)/1000"|bc|xargs printf "0x%x"
0x55818f6eea775
Nanoseconds:
纳秒：
echo "$(date +%s%N)"|xargs printf "0x%x"
0x14e0219022e3745c
