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dbus-send --system --print-reply --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.ListActivatableNames返回结果如下:method return sender=org.freedesktop.DBus -> dest=:1.72 reply_serial=2 array [ string "org.freedesktop.DBus" string "org.freedesktop.login1" string "net.connman.vpn" string "org.freedesktop.systemd1" string "org.freedesktop.PolicyKit1" string "org.freedesktop.hostname1" string "org.bluez" string "org.pacrunner" string "org.freedesktop.PackageKit" string "org.freedesktop.UPower" string "cmos.phone.rpm.query" string "cn.cmos.installer" string "fi.epitest.hostap.WPASupplicant" string "org.gnome.GConf.Defaults" string "org.freedesktop.timedate1" string "fi.w1.wpa_supplicant1" string "org.freedesktop.locale1" ]