Setting default input for a bash script

Question

I am running a bash script that asks me a username and a password every time it executes.I want to keep the default as Arjun, *(^%567590ihyg. Is there a way to do that?

You really shouldn't edit your question to mean something entirely different. — Benjamin W., Aug 11 '17 at 21:29
I edited the question.please check again.sry for the inconvenience — Ramesh, Aug 11 '17 at 21:29
I'm voting to close this question as off-topic because it is not strictly about a programming issue. — Rob Kielty, Aug 11 '17 at 23:24

Petr Skocik · Accepted Answer · 2017-08-11T21:37:50.003

1

Use can use:

: "${x:=the_default_value}"

to set x to the string the_default_value if it's empty or unset.

The syntax is POSIX and is documenting along with related syntaxes at http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02 .

In your case, you can attempt to read the variable or get it through a positional argument:

read name #or name=$1

and then default it if it is empty like so:

: "${name:=Arjun}"

edited Aug 11 '17 at 21:37

answered Aug 11 '17 at 21:32

Petr Skocik

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Thanks for the help sir:) and please upvote the ques – Ramesh Aug 11 '17 at 21:37
@Ramesh Please upvote the ans? :) – Petr Skocik Aug 11 '17 at 21:42
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Please don't solicit upvotes - you'll get them if your question/answer merits it. – dimo414 Aug 11 '17 at 21:43

Setting default input for a bash script

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