我是Ubuntu（Linux tbh）的新手。我在启动MongoDB服务时遇到问题。我想使用Ruby on
Rails和MongoDB创建Web应用程序，但是mongo似乎无法启动。

我在Ubuntu上进行了此MongoDB安装，直到安装完成，所有安装均顺利进行sudo service mongod start

mongod.log

2016-01-01T10:58:15.545+0000 I CONTROL  ***** SERVER RESTARTED *****
2016-01-01T10:58:15.548+0000 I CONTROL  [initandlisten] MongoDB starting : pid=3868 port=27017 dbpath=/var/lib/mongodb 64-bit host=damian-CX61-0NC-CX61-0ND-CX61-0NF-CX61-0NE
2016-01-01T10:58:15.548+0000 I CONTROL  [initandlisten] db version v3.0.8
2016-01-01T10:58:15.548+0000 I CONTROL  [initandlisten] git version: 83d8cc25e00e42856924d84e220fbe4a839e605d
2016-01-01T10:58:15.548+0000 I CONTROL  [initandlisten] build info: Linux ip-10-187-89-126 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49
2016-01-01T10:58:15.548+0000 I CONTROL  [initandlisten] allocator: tcmalloc
2016-01-01T10:58:15.548+0000 I CONTROL  [initandlisten] options: { config: "/etc/mongod.conf", net: { bindIp: "127.0.0.1", port: 27017 }, storage: { dbPath: "/var/lib/mongodb", journal: { enabled: true } }, systemLog: { destination: "file", logAppend: true, path: "/var/log/mongodb/mongod.log" } }
2016-01-01T10:58:15.567+0000 E NETWORK  [initandlisten] Failed to unlink socket file /tmp/mongodb-27017.sock errno:1 Operation not permitted
2016-01-01T10:58:15.567+0000 I -        [initandlisten] Fatal Assertion 28578
2016-01-01T10:58:15.567+0000 I -        [initandlisten]

***aborting after fassert() failure

那么我在做错什么还是其他问题呢？