Re: echo builtin command will give the wrong value of the variable when there is a file named: 11 in the current directory

[Lingfei Kong]

Hi Greg,

Thank you for your detailed explanation, I now understand the reason, and will use quote in my scripts to avoid unexpected bugs.

Best Regards

Lingfei Kong

------------------ Original ------------------

From:  "Greg Wooledge";<wooledg@eeg.ccf.org>;

Date:  Wed, Jul 27, 2016 09:28 PM

To:  "Lingfei Kong"<466701708@qq.com>;

Cc:  "bug-bash"<bug-bash@gnu.org>;

Subject:  Re: echo builtin command will give the wrong value of the variable when there is a file named: 11 in the current directory

On Wed, Jul 27, 2016 at 07:24:11PM +0800, Lingfei Kong wrote:
> # touch 11
> # c='[11761][1469504252]'
> # echo $c               
> 11

This is why you MUST ALWAYS quote your parameter expansions.

echo "$c"

http://mywiki.wooledge.org/Quotes
http://mywiki.wooledge.org/BashGuide