Re: alias in bash script issue

[Greg Wooledge <greg@wooledge.org>]

On Sun, Mar 05, 2023 at 09:26:41AM +0800, Ken Young wrote:
> On Sat, Mar 4, 2023 at 5:53 PM David <bouncingcats@gmail.com> wrote:
> > Debian's default shell is 'dash'. Its manual, readable using 'man dash',
> > says

> my debian 11's default shell is just bash.
> 
> root@nxacloud-bloghost:~# echo $SHELL
> 
> /bin/bash

Both statements are correct, within their contexts.

The default *interactive* shell for user accounts is /bin/bash.

The default /bin/sh symlink (for scripts using #!/bin/sh, etc.) is dash.

The author of a script chooses whether the shebang says #!/bin/bash
(which makes it a bash script) or #!/bin/sh (which makes it an sh script).
The languages are different.