Not able to manipulate date on Unix shell script (date: illegal option -- d)

Question

I have a requirement to add 10 days to current date and assign it to a variable. But I am getting error:

date: illegal option -- d

This is what I tried:

$> NEW_expration_DATE=$(date -d "+10 days")

Result:

date: illegal option -- d
Usage: date [-u] [+Field Descriptors]

There's not enough information here. Which OS is this? OSX/Linux? When you do `man date`, which command line flags do you have available? — Wojciech Adam Koszek, Apr 14 '16 at 19:08

score 11 · Answer 1 · answered Oct 19 '17 at 17:48

11

Try this: NEW_expration_DATE=$(gdate -d "+10 days")

answered Oct 19 '17 at 17:48

venki

score 0 · Answer 2 · edited Apr 13 '17 at 12:36

0

It looks like you are using a POSIX shell, and that there is no way to do simple date arithmetic in here.

I found a guy who explains it and who coded something to substract dates. You may be able to adapt it for your case: https://unix.stackexchange.com/a/7220/162444

Good luck!

edited Apr 13 '17 at 12:36

Community

answered Apr 15 '16 at 08:40

J. Chomel

score 0 · Answer 3 · answered Nov 18 '20 at 20:18

0

You can check the system with "unmane -a" and do a fine search, for example in AIX can use to get yesterday:

YESTERDAY=`TZ=aaa24 date +%Y%m%d`

answered Nov 18 '20 at 20:18

Condemateguadua

3 Answers3