Today I found the date
command has different performance when I develop a bash shell.
In Ubuntu OS:
-> % date -d '2022-06-16T23:21:03' +%s
1655421663
The same command in Alpine OS. This will give an error message:
/ # date -d '2022-06-16T23:21:03' +%s
date: invalid date '2022-06-16T23:21:03'
We have to remove the letter T
from the time string.
/ # date -d '2022-06-16 23:21:03' +%s
1655421663