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571:20200309讓Ubuntu可列印成pdf檔案<br><table width=800 border=8><tr><td bgcolor=cyan><p>(1)$ sudo apt-get install cups-pdf</p>
<p>(2)$ sudo chmod +s /usr/lib/cups/backend/cups-pdf</p>
<p>(3)System/Administration/Printing/New Printer/</p>
<p>(4)解決無法列印的問題訊息「cups-insecure-filter」：</p>
<p>$ sudo chown -hR root /usr/lib/cups/filter<br />$ sudo chown -hR root /usr/lib/cups/backend<br />$ sudo chgrp -hR root /usr/lib/cups/filter<br />$ sudo chgrp -hR root /usr/lib/cups/backend</p>
<p>(5)終於列印成pdf檔成功如下：</p>
<p>ls&nbsp; ~/PDF -l<br />總計 376<br />-rw------- 1 treehrt treehrt 381672&nbsp; 3月&nbsp; 9 20:19 252.pdf</p>
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<p>REF: <a href="https://www.itread01.com/content/1548432908.html">https://www.itread01.com/content/1548432908.html</a></p></table><br> select id,article_id,topic,text from lt_articles_text where article_id =571; ok.
update lt_articles set num_reads=num_reads +1 where id=571; ok.