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    <div class="moz-cite-prefix">On 11/23/2015 10:18 PM, Burton, Ross
      wrote:<br>
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cite="mid:CAJTo0LZOKv0S2-JAb_6goEt6OUetxyB3C24FZpVQyv+RKExTEQ@mail.gmail.com"
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          <div class="gmail_quote">On 23 November 2015 at 09:42, Ming
            Liu <span dir="ltr">&lt;<a moz-do-not-send="true"
                href="mailto:liu.ming50@gmail.com" target="_blank">liu.ming50@gmail.com</a>&gt;</span>
            wrote:<br>
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              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div id=":2gp" class="a3s" style="overflow:hidden">+[ -w
                /etc/timestamp ] &amp;&amp; date -u +%4Y%2m%2d%2H%2M%2S
                &gt; /etc/timestamp</div>
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            <div>This would fail if /etc/timestamp doesn't already
              exist.  I'm tempted to say you should just 2&gt;/dev/null
              so it tries and the error is hidden in case /etc/timestamp
              is deleted on a writable file system.</div>
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    Yes, that is true! I did not consider that case, then I will send a
    V2 soon.<br>
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    //Ming Liu<br>
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            <div>Ross <br>
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