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Snapd

snapd is a REST API daemon for managing snap packages ("snaps"). Users can interact with it by using the snap client, which is part of the same package.

Installation

Install the snapd package.

Usage

The snap tool is used to manage the snaps.

Finding

To find snaps to install, you can query Snapcraft with:

$ snap find searchterm
Tip: You can also search through the Snapcraft website.

Installing

Once you found the snap you are looking for you can install it with:

# snap install snapname

This requires root privileges. Per user installation of snaps is not possible, yet. This will download the snap into /var/lib/snapd/snaps and mount it to /var/lib/snapd/snap/snapname to make it available to the system.

It will also create mount units for each snap and add them to /etc/systemd/system/multi-user.target.wants/ as symlinks to make all snaps available when the system is booted. Once that is done you should find it in the list of installed snaps together with its version number, revision and developer using:

$ snap list

You can also sideload snaps from your local hard drive with:

# snap install --dangerous /path/to/snap

Updating

To update your snaps manually use:

# snap refresh

Snaps are refreshed automatically according to snap refresh.timer setting.

To view the next/last refresh times use:

# snap refresh --time

To set a different refresh time, eg. twice a day:

# snap set core refresh.timer=0:00~24:00/2

See system options documentation page for details on customizing the refresh time.

Removing

Snaps can be removed by executing:

# snap remove snapname

Tips and tricks

Classic snaps

Some snaps (e.g. Skype and Pycharm) use classic confinement. However, classic confinement requires the /snap directory, which is not FHS-compliant. Therefore, the snapd package doesn't ship this directory. However, if the user wants to, they can manually create a symlink from /snap to /var/lib/snapd/snap, to allow the installation of classic snaps:

# ln -s /var/lib/snapd/snap /snap

See also