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    Since it seems a permission error, this may help:
<a class="moz-txt-link-freetext" href="http://docs.openstack.org/developer/devstack/guides/single-machine.html#installation-shake-and-bake">http://docs.openstack.org/developer/devstack/guides/single-machine.html#installation-shake-and-bake</a><br>
    <br>
    NB: in my environment I had to edit the file sudoers with a text
    editor (echoing the string didn't work).<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 01/12/15 09:33, Abhishek Shrivastava
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAOULzZXRsE-5xFv=hnZn=0m=Emqij3wrVLR4A_qTFovzoe-HpA@mail.gmail.com"
      type="cite">
      <div dir="ltr">Hi all,
        <div><br>
        </div>
        <div>I am still getting the same error while installing the
          Openstack through devstack, If someone know the solution
          please reply.</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Fri, Jan 9, 2015 at 1:53 PM,
          Abhishek Shrivastava <span dir="ltr"><<a
              moz-do-not-send="true"
              href="mailto:abhishek@cloudbyte.com" target="_blank">abhishek@cloudbyte.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div dir="ltr">
              <div>Hi L<span style="font-size:13px;white-space:nowrap">iuxinguo,</span></div>
              <div><br>
              </div>
              Thanks for the suggestion, I'll try and make it work.</div>
            <div class="gmail_extra"><br>
              <div class="gmail_quote">
                <div>
                  <div class="h5">On Fri, Jan 9, 2015 at 1:24 PM,
                    liuxinguo <span dir="ltr"><<a
                        moz-do-not-send="true"
                        href="mailto:liuxinguo@huawei.com"
                        target="_blank">liuxinguo@huawei.com</a>></span>
                    wrote:<br>
                  </div>
                </div>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div>
                    <div class="h5">
                      <div link="blue" vlink="purple" lang="ZH-CN">
                        <div>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">Hi Abhishek,</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US"> </span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">For the error in the first
                              line:</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">“mkdir: cannot create
                              directory `/logs': Permission denied”</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">and the error at the end:</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">“ln: failed to create
                              symbolic link
                              `/logs/screen/screen-key.log': No such
                              file or directory”</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US"> </span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">The stack user does not have
                              the permission on “/” so it can not create
                              directory `/logs'.</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US"> </span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">Please check the permission.</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US"> </span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US">liu</span></p>
                          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1f497d"
                              lang="EN-US"> </span></p>
                          <div style="border:none;border-top:solid
                            #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm">
                            <p class="MsoNormal"><b><span
                                  style="font-size:10.0pt">发件人<span
                                    lang="EN-US">:</span></span></b><span
                                style="font-size:10.0pt" lang="EN-US">
                                Abhishek Shrivastava [mailto:<a
                                  moz-do-not-send="true"
                                  href="mailto:abhishek@cloudbyte.com"
                                  target="_blank">abhishek@cloudbyte.com</a>]
                                <br>
                              </span><b><span style="font-size:10.0pt">发
                                  送时间<span lang="EN-US">:</span></span></b><span
                                style="font-size:10.0pt" lang="EN-US">
                                2015</span><span
                                style="font-size:10.0pt">年<span
                                  lang="EN-US">1</span>月<span
                                  lang="EN-US">9</span>日<span
                                  lang="EN-US"> 15:26<br>
                                </span><b>收件人<span lang="EN-US">:</span></b><span
                                  lang="EN-US"> OpenStack Development
                                  Mailing List (not for usage questions)<br>
                                </span><b>主题<span lang="EN-US">:</span></b><span
                                  lang="EN-US"> [openstack-dev]
                                  [devstack] Opensatck installation
                                  issue.</span></span></p>
                          </div>
                          <div>
                            <div>
                              <p class="MsoNormal"><span lang="EN-US"> </span></p>
                              <div>
                                <p class="MsoNormal"><span
                                    style="color:black" lang="EN-US">Hi,</span><span
                                    lang="EN-US"></span></p>
                                <div>
                                  <p class="MsoNormal"><span
                                      lang="EN-US"> </span></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black" lang="EN-US">I'm
                                      trying to install
                                      <b>Openstack<i> </i></b>through<b><i>
                                        </i>devstack master</b> on my <b>Ubuntu</b>
                                      <b>12.04 VM</b>, but it is failing
                                      and generating the following
                                      error.</span><span lang="EN-US"></span></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"><span
                                      lang="EN-US"> </span></p>
                                </div>
                                <div>
                                  <p class="MsoNormal"><span
                                      style="color:black" lang="EN-US">If
                                      anyone can help me resolving this
                                      issue please do reply.</span><span
                                      lang="EN-US"><br clear="all">
                                    </span></p>
                                  <div>
                                    <p class="MsoNormal"><span
                                        lang="EN-US"> </span></p>
                                  </div>
                                  <p class="MsoNormal"><span
                                      lang="EN-US">-- </span></p>
                                  <div>
                                    <div>
                                      <div>
                                        <div>
                                          <div>
                                            <div>
                                              <div>
                                                <p class="MsoNormal"><b><span
style="color:#0b5394" lang="EN-US">Thanks & Regards,</span></b><span
                                                    lang="EN-US"></span></p>
                                              </div>
                                              <p class="MsoNormal"><b><span
style="color:#0b5394" lang="EN-US">Abhishek</span></b><span lang="EN-US"></span></p>
                                            </div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div>
                      <br>
                    </div>
                  </div>
                  _______________________________________________<br>
                  OpenStack-dev mailing list<br>
                  <a moz-do-not-send="true"
                    href="mailto:OpenStack-dev@lists.openstack.org"
                    target="_blank">OpenStack-dev@lists.openstack.org</a><br>
                  <a moz-do-not-send="true"
                    href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev"
                    target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><br>
                  <br>
                </blockquote>
              </div>
              <span class=""><br>
                <br clear="all">
                <div><br>
                </div>
                -- <br>
                <div>
                  <div dir="ltr">
                    <div>
                      <div dir="ltr">
                        <div>
                          <div dir="ltr">
                            <div><font color="#0b5394"><b>Thanks &
                                  Regards,<br>
                                </b></font></div>
                            <b><font color="#0b5394">Abhishek</font></b><br>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
              </span></div>
          </blockquote>
        </div>
        <br>
        <br clear="all">
        <div><br>
        </div>
        -- <br>
        <div class="gmail_signature">
          <div dir="ltr">
            <div>
              <div dir="ltr">
                <div>
                  <div dir="ltr">
                    <div><font color="#0b5394"><b>Thanks & Regards,<br>
                        </b></font></div>
                    <b><font color="#0b5394">Abhishek</font></b><br>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">__________________________________________________________________________
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Unsubscribe: <a class="moz-txt-link-abbreviated" href="mailto:OpenStack-dev-request@lists.openstack.org?subject:unsubscribe">OpenStack-dev-request@lists.openstack.org?subject:unsubscribe</a>
<a class="moz-txt-link-freetext" href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a>
</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
Pasquale Porreca

DEK Technologies
Via dei Castelli Romani, 22
00040 Pomezia (Roma)

Mobile +39 3394823805
Skype paskporr</pre>
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