Re: My bash script is missing something - what?
On 2016-10-10 10:57, Greg Wooledge wrote:
> On Mon, Oct 10, 2016 at 11:51:37AM -0400, songbird wrote:
>> Richard Owlett wrote:
>> > I have a trivial bash script named test.sh which has been marked
>> > as executable.
>
>> also remember that test itself is a builtin
>> or binary on some systems.
>
> It's required by POSIX, so it will be a command on *every* system.
> Whether it's a shell builtin is not specified, but every modern shell
> makes it a builtin -- even dash.
>
>> you may be running on thing and thinking
>> you are running another.
>>
>> in this particular case with the .sh
>> extension you are safe, but forget that
>> once and ...
>
> Yes, this is excellent advice. After being bitten by this once or twice
> in my early Unix years, I stopped making commands called "test" and made
> commands called "foo", "bar", "foobar", etc.
This is a very good point, and one example on Debian Wheezy:
Look at /usr/bin/test
and see
'man test'
or
'info coreutils 'test invocation''
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