我曾经有 mongodb 2.6.3 并且 mongod 服务一直在工作。昨天我更新到 mongodb 3.0.3，如果我输入mongo终端，我会得到：
2015-06-06T10:24:51.679+0200 W NETWORK Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2015-06-06T10:24:51.682+0200 E QUERY Error: couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed
at connect (src/mongo/shell/mongo.js:179:14)
at (connect):1:6 at src/mongo/shell/mongo.js:179
exception: connect failed
service mongod start每次重新启动后我都必须这样做。有没有办法来解决这个问题？
PS我被问到输出initctl list，这里是：
gnome-keyring-gpg stop/waiting
indicator-application stop/waiting
unicast-local-avahi stop/waiting
update-notifier-crash stop/waiting
upstart-udev-bridge start/running, process 1766
jayatana stop/waiting
update-notifier-hp-firmware stop/waiting
xsession-init stop/waiting
dbus start/running, process 1775
update-notifier-cds stop/waiting
gnome-keyring-ssh stop/waiting
gnome-session (Unity) start/running, process 1852
ssh-agent stop/waiting
unity7 start/running, process 1857
unity-voice-service stop/waiting
upstart-dbus-session-bridge start/running, process 1810
indicator-messages start/running, process 2007
logrotate stop/waiting
indicator-bluetooth start/running, process 2008
unity-panel-service start/running, process 1859
hud start/running, process 1846
im-config start/running
notify-cgmanager stop/waiting
unity-gtk-module stop/waiting
session-migration stop/waiting
upstart-dbus-system-bridge start/running, process 1827
at-spi2-registryd start/running, process 1850
indicator-power start/running, process 2009
update-notifier-release stop/waiting
indicator-datetime start/running, process 2010
indicator-keyboard start/running, process 2011
unity-settings-daemon start/running, process 1848
indicator-sound start/running, process 2012
upstart-file-bridge start/running, process 1828
gnome-keyring stop/waiting
gnome-settings-daemon stop/waiting
window-stack-bridge start/running, process 1787
indicator-printers start/running, process 2014
re-exec stop/waiting
upstart-event-bridge stop/waiting
unity-panel-service-lockscreen stop/waiting
indicator-session start/running, process 2016