I have a date string that I am able to parse and format with the date command from a bash script.
我有一个日期字符串，可以从bash脚本中解析和格式化日期命令。
But how can I determine how many days ago this date was from my script? I would like to end up with a number.
但是，我要如何确定这个日期是多少天前从我的脚本?我想以一个数字结束。
3 个解决方案
#1
7
You can do some date arithmetics:
你可以做一些日期算术:
DATE=01/02/2010
echo $(( ( $(date +%s) - $(date -d "$DATE" +%s) ) /(24 * 60 * 60 ) ))
#2
4
Convert your date and now into seconds since the epoch, subtract, divide by the number of seconds in a day:
将你的日期转换成秒，然后减去，除以一天的秒数:
#!/bin/bash
((a = `date -d "Wed Jan 12 02:33:22 PST 2011" +%s`))
((b = `date +%s`))
echo $(( (b-a) / (60*60*24)))
#3
2
Use date itself as date value for date. Example 5 days ago:
使用日期本身作为日期的日期。示例5天前:
date -d "`date`-5days"
#1
7
You can do some date arithmetics:
你可以做一些日期算术:
DATE=01/02/2010
echo $(( ( $(date +%s) - $(date -d "$DATE" +%s) ) /(24 * 60 * 60 ) ))
#2
4
Convert your date and now into seconds since the epoch, subtract, divide by the number of seconds in a day:
将你的日期转换成秒，然后减去，除以一天的秒数:
#!/bin/bash
((a = `date -d "Wed Jan 12 02:33:22 PST 2011" +%s`))
((b = `date +%s`))
echo $(( (b-a) / (60*60*24)))
#3
2
Use date itself as date value for date. Example 5 days ago:
使用日期本身作为日期的日期。示例5天前:
date -d "`date`-5days"