<p>again i am getting the same error after following you and pasting sudo add-apt-repository -y ppa:boost-latest/ppa in my terminal iand getting this-dhanpal@dhanpal-HP-Pavilion-15-Notebook-PC:~$ sudo add-apt-repository -y ppa:boost-latest/ppa<br>
[sudo] password for dhanpal: <br>
gpg: keyring <code>/tmp/tmphh4slP/secring.gpg' created<br>
gpg: keyring</code>/tmp/tmphh4slP/pubring.gpg' created<br>
gpg: requesting key 029DB5C7 from hkp server keyserver.ubuntu.com<br>
gpg: /tmp/tmphh4slP/trustdb.gpg: trustdb created<br>
gpg: key 029DB5C7: public key "Launchpad boost-latest" imported<br>
gpg: Total number processed: 1<br>
gpg:               imported: 1  (RSA: 1)<br>
OK</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">&mdash;<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/mlpack/mlpack/issues/776#issuecomment-244564447">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/AJ4bFLvFhzGKuLixUUYRRKkR27-oTgJWks5qmcXYgaJpZM4J0VAR">mute the thread</a>.<img alt="" height="1" src="https://github.com/notifications/beacon/AJ4bFHmGEBkyEL6VfYB6pZjwreRgfqeaks5qmcXYgaJpZM4J0VAR.gif" width="1" /></p>
<div itemscope itemtype="http://schema.org/EmailMessage">
<div itemprop="action" itemscope itemtype="http://schema.org/ViewAction">
  <link itemprop="url" href="https://github.com/mlpack/mlpack/issues/776#issuecomment-244564447"></link>
  <meta itemprop="name" content="View Issue"></meta>
</div>
<meta itemprop="description" content="View this Issue on GitHub"></meta>
</div>

<script type="application/json" data-scope="inboxmarkup">{"api_version":"1.0","publisher":{"api_key":"05dde50f1d1a384dd78767c55493e4bb","name":"GitHub"},"entity":{"external_key":"github/mlpack/mlpack","title":"mlpack/mlpack","subtitle":"GitHub repository","main_image_url":"https://cloud.githubusercontent.com/assets/143418/17495839/a5054eac-5d88-11e6-95fc-7290892c7bb5.png","avatar_image_url":"https://cloud.githubusercontent.com/assets/143418/15842166/7c72db34-2c0b-11e6-9aed-b52498112777.png","action":{"name":"Open in GitHub","url":"https://github.com/mlpack/mlpack"}},"updates":{"snippets":[{"icon":"PERSON","message":"@hunk3749 in #776: again i am getting the same error after following you and pasting sudo add-apt-repository -y ppa:boost-latest/ppa in my terminal iand getting this-dhanpal@dhanpal-HP-Pavilion-15-Notebook-PC:~$ sudo add-apt-repository -y ppa:boost-latest/ppa\r\n[sudo] password for dhanpal: \r\ngpg: keyring `/tmp/tmphh4slP/secring.gpg' created\r\ngpg: keyring `/tmp/tmphh4slP/pubring.gpg' created\r\ngpg: requesting key 029DB5C7 from hkp server keyserver.ubuntu.com\r\ngpg: /tmp/tmphh4slP/trustdb.gpg: trustdb created\r\ngpg: key 029DB5C7: public key \"Launchpad boost-latest\" imported\r\ngpg: Total number processed: 1\r\ngpg:               imported: 1  (RSA: 1)\r\nOK\r\n"}],"action":{"name":"View Issue","url":"https://github.com/mlpack/mlpack/issues/776#issuecomment-244564447"}}}</script>