Container Apps

Packaging Apps To Run on Any Linux Device

To dev or Not to dev

Developer mode (devmode ) offers a much looser set of controls, in the sense that, rather than actions being blocked, warnings are sent to Syslog (usually into one of the /var/log/messages  or /var/log/syslog  files, depending on the distribution). Some detail in the debugging documentation explains that you should always add the --devmode  option explicitly when you install a snap for sandbox work – even if you’ve loosened your security confinement settings within your YAML configuration file (snapcraft.yaml ).

It’s a Classic

To run a snap in a no-holds-barred, throwing-caution-to-the-wind mode, you select --classic,  wherein the snap treats the host resources as its own. In the Snap Store, where a full catalog of snaps can be downloaded, any snaps set to run in class ic  mode are scrutinized by a human for safety reasons. I'll look at much more about how you can develop your apps in classic  mode in a moment.

Automatic Updates

Automatic updates are a Natty addition. In the background, the current version of your snaps are checked against the latest versions and then updated if required on a daily basis. You can also use the refresh  option to make sure you have the latest versions.

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