MongoDB Failing to Start - ***aborting after fassert() failure : <p>I am new to Ubuntu (Linux tbh). I encountered problem with starting MongoDB service. I want to created web app using Ruby on Rails and MongoDB but mongo seems to fail to start.</p>

<p>I followed this <a href="https://docs.mongodb.org/v3.0/tutorial/install-mongodb-on-ubuntu/">MongoDB installation on Ubuntu</a> all of installation went without problems until I got to <code>sudo service mongod start</code> </p>

<p><strong>mongod.log</strong></p>

<pre><code>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
</code></pre>

<p>So what I am doing wrong or its different issue?</p>
