Snap supports a set of system-wide options that allow you to customise your snap environment.
As with Configuration in snaps, these options are changed with the
get commands, but with a target of system instead of a specific snap:
$ snap set system some.option="some value" $ snap get system some.option
Configuration options can be unset by either passing their names to the unset command or by
adding an exclamation mark (!) to the end of an option name: (from snapd 2.41+):
$ snap unset system some.option $ # or $ snap set system some.option!
On a Raspberry Pi, the following options set corresponding values in the config.txt system configuration file:
Further details on the above, see the official Raspberry Pi documentation.
These options may be set to change the proxies to be used by the system when communicating with external sites that speak the respective protocols.
Available since snapd 2.28.
There are four system-wide options that are used to manage how updates are handed:
See Controlling updates for further details on how the above options are used.
May be set to true for disabling the SSH service at startup.
Available since snapd 2.22.
Automatic snapshot retention time is configured with the
snapshots.automatic.retention system option. The default value is 31 days, and the value needs to be greater than 24 hours:
$ snap set system snapshots.automatic.retention=30h
To disable automatic snapshots, set the retention time to
$ snap set system snapshots.automatic.retention=no
Automatic snapshots require snap version 2.39+.
A custom SSL certificate can be added to snapd’d trusted certificates pool for the store communication with the
store-certs.<name>=<value> system option.
To add a certificate, enter the following:
$ snap set system store-certs.cert1="$(cat /path/to/mycert)"
A certificate can be removed with unset:
$ snap unset system store-certs.cert1
Available since snapd 2.45
Defines the behaviour of the system when the power key is pressed.
May be set to one of:
Available since snapd 2.23.
Last updated 23 days ago. Help improve this document in the forum.