title: Fatal Assertion in MongoDB
body: <p>I have been uninstalling and reinstalling Mongodb on Ubuntu 14.04 following the <a href="https://docs.mongodb.org/v3.0/tutorial/install-mongodb-on-ubuntu/" rel="nofollow">official documentation</a> for few times now. However, I keep getting this:</p>
  
  <pre><code>2015-12-22T12:46:32.091+0000 I CONTROL  ***** SERVER RESTARTED *****
  2015-12-22T12:46:32.096+0000 I CONTROL  [initandlisten] MongoDB starting : pid=7039 port=27017 dbpath=/var/lib/mongodb 64-bit host=server-04
  2015-12-22T12:46:32.096+0000 I CONTROL  [initandlisten] db version v3.0.8
  2015-12-22T12:46:32.096+0000 I CONTROL  [initandlisten] git version: 83d8cc25e00e42856924d84e220fbe4a839e605d
  2015-12-22T12:46:32.096+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
  2015-12-22T12:46:32.096+0000 I CONTROL  [initandlisten] allocator: tcmalloc
  2015-12-22T12:46:32.096+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 } }, syste$
  2015-12-22T12:46:32.120+0000 E NETWORK  [initandlisten] Failed to unlink socket file /tmp/mongodb-27017.sock errno:1 Operation not permitted
  2015-12-22T12:46:32.120+0000 I -        [initandlisten] Fatal Assertion 28578
  2015-12-22T12:46:32.120+0000 I -        [initandlisten]
  
  ***aborting after fassert() failure
  </code></pre>
  
  <p>I am expecting to see: <code>[initandlisten] waiting for connections on port &lt;port&gt;</code> but can't see it. What can cause it?</p>