> systemd-sysext [OPTION…] COMMAND …

Merge system extension images into /usr/ and /opt/.

Commands:
  [status]                 Show current merge status (default)
  merge                    Merge extensions into relevant hierarchies
  unmerge                  Unmerge extensions from relevant hierarchies
  refresh                  Unmerge/merge extensions again
  list                     List installed extensions

Options:
  -h --help                Show this help
     --version             Show package version
     --root=PATH           Operate relative to root PATH
     --mutable=MODE        Specify a mutability mode (yes, no, auto, import, ephemeral,
                           ephemeral-import, help)
     --image-policy=POLICY Specify disk image dissection policy
     --noexec=BOOL         Whether to mount extension overlay with noexec
     --force               Ignore version incompatibilities
     --no-reload           Do not reload the service manager
     --always-refresh=BOOL Whether to refresh when no changes were found
     --no-pager            Do not start a pager
     --no-legend           Do not show headers and footers
     --json=FORMAT         Generate JSON output (pretty, short, or off)

See the systemd-sysext(8) man page for details.