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Canonical Improves Classic Confinement and Aliases Support in Snapd 2.21 Daemon

Marked as the first point release to the major Snapd 2.2 series, which introduced classic confinement support, Snapd 2.21’s highlights include the new physical-memory-* and io-ports-control interfaces, enablement of the getsockopt interface by default everyhwere, and support for installing classic confined Snaps from the Snappy Store. Snapd 2.21 also improves alias handling with a new “snap aliases” command that would allow users to list available aliases and their current status, as well as auto-alias enhancements. Moreover, it improves the output of the “snap find” command when nothing is found and switches to a pure, Go-based gettext implementation.