Re: [PLUG] zsh: command not found:

[LeRoy Cressy via plug <plug@lists.phillylinux.org>]

On 5/31/23 23:19, JP Vossen via plug wrote:
> On 5/31/23 10:36 PM, Gary Duzan via plug wrote:
>>> I always do #!/bin/sh
>>> But I've seen lots of others use #!/usr/bin/env bash
>>> What's the advantage of the latter?
>>
>>      It gets bash from the PATH instead of whatever specific path you
>> specify. If you have a non-standard setup, or if you want to use a
>> different version installed elsewhere, this can be a benefit. It could
>> also be a security issue if you accidentally put something insecure in
>> your PATH and you end up running a worm called "bash" from there. I've
>> seen the end trick most often with python, presumably from the days
>> when it wasn't standard equipment, so you ended up putting it in
>> /usr/local/bin or $HOME/bin or something. My NetBSD systems have it in
>> /usr/pkg/bin.
> 
> What Gary said, but also don't use `sh` when you mean `bash`.  That used to Just Work on Linux (but not elsewhere), but since about 2016 it's not reliable on Linux either, due to use of `dash` as `sh` instead of the much larger and thus slower `bash`.
> 
> I'm torn on the hard-code vs. `env` approach.  `env` is more portable, but there are possible path/poisoning issues as noted.  `#!/bin/bash` is just easier to type and more familiar.  :-)
> 

Not all Linux distributions use /bin /sbin and other bin directories. 
For instance Arch Linux uses symlinks for /bin /sbin and other bin 
directories all pointing to /usr/bin.  What will happen if your favorite 
distribution removes the symlinks?

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