I am writing a bash shell script in Linux, this program will accept a date (mm-dd-yyyy) as a parameter. I am wondering if there is a simply way to check if the date is valid? is there an operator and I can just use test to check?
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I am writing a bash shell script in Linux, this program will accept a date (mm-dd-yyyy) as a parameter. I am wondering if there is a simply way to check if the date is valid? is there an operator and I can just use test to check?
You can check with
date -d "datestring"So
date -d "12/31/2012"is valid, but using hyphens, e.g.date -d "12-31-2012", is not valid fordate.You can also use words:
date -d 'yesterday'ordate -d '1 week ago'are both valid.