Bash Tip - date 日期指令轉換 unix epoch time 範例

 

Command - date

Example 1 date - convert unix epoch timestamp to date string

$ date  --date='@1617694020'
Tue 06 Apr 2021 07:27:00 AM UTC

Example 2 date - convert unix timestamp to custom formatted date string

$ date +"%Y-%m-%d %H:%m" --date='@1617694020'
2021-04-06 07:04
$ date  --date='@1617694020.904'
Tue 06 Apr 2021 07:27:00 AM UTC

Example 3 date -- MacOS Mojave convert timestamp to date string

## MacOS Mojave not support --date
$ date  --date='@1617694020.904'
date: illegal option -- -
usage: date [-jnRu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ...
          [-f fmt date | [[[mm]dd]HH]MM[[cc]yy][.ss]] [+format]
## use -r to instead
$ date -r 1625043610 +"%Y%m%d %H:%M:%S"
20210630 17:00:10