dmd: failed to launch executable

[John Colvin via Digitalmars-d]

On Saturday, 19 September 2015 at 15:46:32 UTC, Rinzler wrote:
> On Saturday, 19 September 2015 at 15:32:33 UTC, Laeeth Isharc 
> wrote:
>> On Saturday, 19 September 2015 at 10:21:30 UTC, Rinzler wrote:
>>> On Saturday, 19 September 2015 at 10:17:21 UTC, Jacob 
>>> Carlborg wrote:
>>>> On 2015-09-19 12:05, Rinzler wrote:
>>>>>> what does "which dmd" give you?
>>>>>
>>>>> Nothing...
>>>>
>>>> And "type dmd | head -n 1"? If that gives you some kind of 
>>>> path, what does then "file <path>" print?
>>>
>>> I don't even have a tool called "type"? Should I install it 
>>> just for testing this?
>>
>> He means type ie enter the following line in the console:
>>
>> dmd | head -n 1
>
> It gives me: -bash: dmd: command not found
>
> Now, suddenly and mysteriously, if I type
>
> dmd,
>
> I get
>
> -bash: dmd: command not found .
>
> Really strange...

Quick point about paths and so on: if you don't understand what's 
going on, or have just made a change and want to be sure whether 
it worked, always open a new terminal session and try again. 
There are caches that can need emptying, environment variables 
that get inadvertently set etc.
I can't count the number of times I've been convinced somethings 
completely broken only to start a new terminal and find it all 
makes perfect sense again.

Totally simple, obvious advice, I know, but nonetheless always 
worth repeating.