[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Help-bash] variable assign preceding script
From: |
Zoho |
Subject: |
Re: [Help-bash] variable assign preceding script |
Date: |
Thu, 2 Jun 2016 23:26:19 +0800 |
ok,thanks! it is very helpful。
发自我的 iPhone
> 在 2016年6月2日,下午11:10,Greg Wooledge <address@hidden> 写道:
>
>> On Thu, Jun 02, 2016 at 11:04:56PM +0800, Wu Shuangrong wrote:
>> Thanks for your prompt reply.
>> I have checked this, it really behaves the way as you said.
>> Does this only occur for script files? What about binary command?
>
> Commands like sed, grep, awk that aren't shells do not use the IFS
> variable at all. Awk has both input and output field separators,
> but they are specified with different commands/options. E.g. to
> specify an awk input field separator of : from the command line:
>
> $ head -n 1 /etc/passwd | awk -F: '{print $1}'
> root