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In this video we'll see how to add our newly built in Genex install as a linnik Service and how to update

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engine X without any downtime whether this be did change change in its core or simply to add extra modules.

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We could of course simply stop and start engine X were things in X executable but running it as a linnik

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service means other programs can interact with it much easier and make for an all round more standard

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experience.

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I'm back on a custom board of engine X. one point nine point two on a boon to fourteen point in exactly

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as in the previous video.

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And obviously when we try and run service engine start we get unrecognized service as engine hasn't

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yet been added as a clinic service.

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To add this we need to create an initial script for engine X which we can simply download from Engine

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X Weeki site so we'll head over to weeky dot engineers dot in its scripts where you'll see a list of

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in its script for different operating systems and even variations of those scripts.

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I'm going to go to the Ubuntu section and just navigate to this standard in its script.

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On the main page we can see the actual script Shaw Stonier.

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But I'm going to go ahead to the project page and like many Google Code projects.

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This one has moved to get hub.

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And here we are.

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So the project rebo contains some docs here which will look at in a minute but first we want to go and

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get the actual in its script year.

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And I'll copy this link and head back over to my terminal.

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We want to put this file in see init don't die as this is where all the initial scripts for different

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linnik services live.

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Just download the script here.

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And for Linux to know about this new script we need to load it by running update dash our C dot B and

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then a f flag.

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Engine X defaults.

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We have a permissions error though so we'll fix that by making the script executable.

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And try again.

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And this time we get.

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You don't have permissions to execute in generics.

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Now this might again seem like a permissions error but what's actually happening here is that the init

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script expect so engine X installed to be located in all the default bold locations.

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Of course we made some changes when configuring our board.

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So we need to tell them in a script about those changes.

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If we look at they need script read me on get how we'll see this section.

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Weird mentions that any script variables can be overridden by sitting them in ATC default engine X..

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These variables get set in a separate file so we don't need to directly edit them in a script.

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Right now this file doesn't exist but will simply created by adding our first configuration variable.

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Engine X conf file which correspond to the conf path option we set and our bold configuration.

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And will also append to that file the Daim in variable which corresponds to our espin path configuration

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option.

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OK.

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The engineered script should now know where to load change in x configuration from and also where to

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find the engine X executable.

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We'll try running that service again and this time it works as expected so we can go ahead and start

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engineer X..

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Head over to the browser.

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And we get that welcome page.

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Likewise if we stop our service that works to add a refresh confirms this.

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Next we'll very quickly look at updating our engineers install without any downtime to demonstrate this.

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I'll simply be changing my install from that main line version 1 point nine point two to the stable

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version one point eight.

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And we can see here we are on one point nine point two and I'll just start that service before starting

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the update.

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Two we know in Genesis running.

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Okay I am going to speed through this install as we've done this in the previous video.

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But basically I'm just copying the link to that stable version of engine X download it.

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Extract.

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Move into the Directory and run configure just as before with all the same options.

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And will make.

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Then make install.

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And once this is all done we can again check that engine X version number to see we are now in fact

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running version 1 point eight.

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But if I perform ahead a request for the IP address just using coal we still see version one point nine

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point two running.

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And this is because the engine X master process is still from the previous install and isn't aware of

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the changes but we can very easily update this by running servers in generics reload which will simply

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send a kill signal to the mast engine and process and immediately launch a new one.

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Now if we check those headers again we do in fact see version one point eight running and this all happened

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gracefully without any need for downtime.

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That's it for this video and in the next We'll very briefly look at engine X on Windows.