<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">내 경우에는 라즈베리 파이에 USB 무선 랜카드를 연결해서 사용하고 있는 중인데, 전원만 연결해놓고 안쓰다가 갑자기 라즈베리 파이로 연결하려고 들면, 라즈베리 파이의 네트워크가 해제되어 접속할 수 없는 경우가 제법 있었다. 하지만 몇 번 시도하다 보면 접속이 복원되어서 다시 정상적인 접속이 가능했다. 그래서 평소에는 라즈베리 파이로 작업을 하기 전 몇초동안 계속 라즈베리 파이로 ping을 날려준 후, 정상적으로 ping 신호가 오는것을 확인한 후에 작업을&nbsp;하곤 했다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">그러다가 이것도 왠지 짜증나서 어떻게 해결방법이 없을까 생각해보다가, 혹시 라즈베리 파이도 스마트폰의 와이파이 모듈처럼 절전 모드가 있어서, 일정 시간동안 사용하지 않으면 절전 모드가 되어 네트워크가 해제되는 것이 아닐까 의심했다. 그리고 예감은 옳았던 것 같다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">이 문제는 이런저런 정황을 고려해 봤을때 리얼텍 8192 cu 칩셋을 사용하는 무선 랜카드의 모델에서 발생하는 것 같지만, 내가 사용하는 무선 랜카드는 리얼텍 8188을 사용하기 때문에 꼭 그런것만은 아닐수도 있겠다. 다만, 리얼텍 8192하고 8188이 기능상 서로 호환되기 때문일 수도 있다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">서론이 길었는데, 이런 경우 라즈베리 파이의 터미널에서 다음 명령어를 쳐 보자.</p>
<div id="crayon-5cc2a1452259f062213635" class="crayon-syntax crayon-theme-classic crayon-font-monaco crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouseover" style="margin: 12px 0px; padding: 0px; box-sizing: border-box; text-size-adjust: none; width: 607.594px; font-family: Monaco, MonacoRegular, &quot;Courier New&quot;, monospace; color: #676767; height: auto; overflow: hidden !important; position: relative !important; direction: ltr !important; border-width: 1px !important; border-color: #999999 !important; border-style: solid !important; text-shadow: none !important; background: rgb(253, 253, 253) !important; line-height: 15px !important;">
   <div class="crayon-toolbar" data-settings=" show" style="margin: 0px; padding: 0px; border-top: 0px; border-right: 0px; border-left: 0px; border-image: initial; width: 605.594px; position: relative; overflow: hidden; z-index: 4; background: rgb(221, 221, 221) !important; border-bottom: 1px solid rgb(187, 187, 187) !important; height: 18px !important; line-height: 18px !important;"><span class="crayon-title" style="margin: 0px; padding: 0px 4px !important; font-family: inherit; float: left; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #333333 !important;"></span>
      <div class="crayon-tools" style="margin: 0px; padding: 0px; font-family: inherit; background: 0px center; border: 0px; position: absolute; right: 0px; height: 18px !important; line-height: 18px !important; font-weight: inherit !important; float: right !important;">
         <div class="crayon-button crayon-nums-button crayon-pressed" title="줄 번호 토글" style="margin: 0px; padding: 0px; font-family: inherit; background: -24px 0px no-repeat rgb(188, 188, 188); border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; color: #ffffff; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) -24px -32px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-plain-button" title="일반 코드 토글" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -48px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-wrap-button" title="줄 바꿈 토글" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -112px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-copy-button" title="복사" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -16px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-popup-button" title="새 창에서 보기" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px 0px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         </div>
      </div>
   <div class="crayon-plain-wrap" style="background: 0px center; border: 0px; margin: 0px !important; padding: 0px !important; height: auto !important;"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick" readonly="" style="margin: 0px; padding-top: 0px; padding-right: 5px; padding-left: 5px; vertical-align: middle; outline: none; width: 575.313px; border-width: 0px; border-style: initial; border-color: initial; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; box-shadow: none; min-width: 95%; max-width: 95%; height: 34px; overflow: hidden; position: absolute; opacity: 0; border-radius: 0px; white-space: pre; overflow-wrap: normal; resize: none; color: #000000; tab-size: 4; z-index: 0; font-size: 12px !important; font-family: Monaco, MonacoRegular, &quot;Courier New&quot;, monospace !important; line-height: 15px !important;"></textarea></div>
   <div class="crayon-main" style="margin: 0px; padding: 0px; background: 0px center; border: 0px; width: 605.594px; overflow: hidden; position: relative; z-index: 1;">
      <table class="crayon-table" style="margin-left: 0px; margin-top: 0px !important; margin-right: 0px !important; margin-bottom: 0px !important; padding: 0px !important; border-width: initial !important; border-style: none !important; border-color: initial !important; background: none !important; width: auto !important; border-spacing: 0px !important; table-layout: auto !important;">
         <tbody style="margin: 0px; padding: 0px;">
            <tr class="crayon-row" style="background: 0px center; margin: 0px !important; padding: 0px !important; border: none !important; vertical-align: top !important;">
               <td class="crayon-nums " data-settings="show" style="border-width: 0px; border-style: initial; border-color: initial; margin: 0px !important; padding: 0px !important; vertical-align: top !important; background: rgb(223, 239, 255) !important; color: #5499de !important;">
                  <div class="crayon-nums-content" style="margin: 0px; padding: 0px; background: 0px center; border: 0px; white-space: nowrap; line-height: 15px !important;">
                     <div class="crayon-num" data-line="crayon-5cc2a1452259f062213635-1" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">1</div>
                     </div>
                  </td>
               <td class="crayon-code" style="border-width: 0px; border-style: initial; border-color: initial; background: 0px center; width: 587px; margin: 0px !important; padding: 0px !important; vertical-align: top !important;">
                  <div class="crayon-pre" style="margin: 0px; padding: 0px; white-space: pre; overflow: visible; tab-size: 4; background: none !important; border: none !important; line-height: 15px !important;">
                     <div class="crayon-line" id="crayon-5cc2a1452259f062213635-1" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">cat /sys/module/8192cu/parameters/rtw_power_mgnt</div>
                     </div>
                  </td>
               </tr>
            </tbody>
         </table>
      </div>
   </div>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">위 명령어를 쳤을때 0이 나오면 절전 모드가&nbsp;해제되어 있는 것이고, 1이나 2가 나올 경우에는 절전 모드를 사용 중이다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">절전 모드를 해제하기 위해서는 vi나 nano 등의 편집기로&nbsp;/etc/modprobe.d/8192cu.conf 파일을 새로 작성해서 설정하면 된다. 참고로 이 파일을 작성하거나 편집하려면 관리자의 권한이 있어야 한다. 내 경우에는 역시 nano보다는 vi가 더 손에 맞는거 같다.</p>
<div id="crayon-5cc2a145225b3562419383" class="crayon-syntax crayon-theme-classic crayon-font-monaco crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouseover" style="margin: 12px 0px; padding: 0px; box-sizing: border-box; text-size-adjust: none; width: 607.594px; font-family: Monaco, MonacoRegular, &quot;Courier New&quot;, monospace; color: #676767; height: auto; overflow: hidden !important; position: relative !important; direction: ltr !important; border-width: 1px !important; border-color: #999999 !important; border-style: solid !important; text-shadow: none !important; background: rgb(253, 253, 253) !important; line-height: 15px !important;">
   <div class="crayon-toolbar" data-settings=" show" style="margin: 0px; padding: 0px; border-top: 0px; border-right: 0px; border-left: 0px; border-image: initial; width: 605.594px; position: relative; overflow: hidden; z-index: 4; background: rgb(221, 221, 221) !important; border-bottom: 1px solid rgb(187, 187, 187) !important; height: 18px !important; line-height: 18px !important;"><span class="crayon-title" style="margin: 0px; padding: 0px 4px !important; font-family: inherit; float: left; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #333333 !important;"></span>
      <div class="crayon-tools" style="margin: 0px; padding: 0px; font-family: inherit; background: 0px center; border: 0px; position: absolute; right: 0px; height: 18px !important; line-height: 18px !important; font-weight: inherit !important; float: right !important;">
         <div class="crayon-button crayon-nums-button crayon-pressed" title="줄 번호 토글" style="margin: 0px; padding: 0px; font-family: inherit; background: -24px 0px no-repeat rgb(188, 188, 188); border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; color: #ffffff; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) -24px -32px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-plain-button" title="일반 코드 토글" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -48px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-wrap-button" title="줄 바꿈 토글" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -112px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-copy-button" title="복사" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -16px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-popup-button" title="새 창에서 보기" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px 0px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         </div>
      </div>
   <div class="crayon-plain-wrap" style="background: 0px center; border: 0px; margin: 0px !important; padding: 0px !important; height: auto !important;"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick" readonly="" style="margin: 0px; padding-top: 0px; padding-right: 5px; padding-left: 5px; vertical-align: middle; outline: none; width: 575.313px; border-width: 0px; border-style: initial; border-color: initial; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; box-shadow: none; min-width: 95%; max-width: 95%; height: 34px; overflow: hidden; position: absolute; opacity: 0; border-radius: 0px; white-space: pre; overflow-wrap: normal; resize: none; color: #000000; tab-size: 4; z-index: 0; font-size: 12px !important; font-family: Monaco, MonacoRegular, &quot;Courier New&quot;, monospace !important; line-height: 15px !important;"></textarea></div>
   <div class="crayon-main" style="margin: 0px; padding: 0px; background: 0px center; border: 0px; width: 605.594px; overflow: hidden; position: relative; z-index: 1;">
      <table class="crayon-table" style="margin-left: 0px; margin-top: 0px !important; margin-right: 0px !important; margin-bottom: 0px !important; padding: 0px !important; border-width: initial !important; border-style: none !important; border-color: initial !important; background: none !important; width: auto !important; border-spacing: 0px !important; table-layout: auto !important;">
         <tbody style="margin: 0px; padding: 0px;">
            <tr class="crayon-row" style="background: 0px center; margin: 0px !important; padding: 0px !important; border: none !important; vertical-align: top !important;">
               <td class="crayon-nums " data-settings="show" style="border-width: 0px; border-style: initial; border-color: initial; margin: 0px !important; padding: 0px !important; vertical-align: top !important; background: rgb(223, 239, 255) !important; color: #5499de !important;">
                  <div class="crayon-nums-content" style="margin: 0px; padding: 0px; background: 0px center; border: 0px; white-space: nowrap; line-height: 15px !important;">
                     <div class="crayon-num" data-line="crayon-5cc2a145225b3562419383-1" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">1</div>
                     </div>
                  </td>
               <td class="crayon-code" style="border-width: 0px; border-style: initial; border-color: initial; background: 0px center; width: 587px; margin: 0px !important; padding: 0px !important; vertical-align: top !important;">
                  <div class="crayon-pre" style="margin: 0px; padding: 0px; white-space: pre; overflow: visible; tab-size: 4; background: none !important; border: none !important; line-height: 15px !important;">
                     <div class="crayon-line" id="crayon-5cc2a145225b3562419383-1" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">sudo vi /etc/modprobe.d/8192cu.conf</div>
                     </div>
                  </td>
               </tr>
            </tbody>
         </table>
      </div>
   </div>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">편집기 화면이 뜨면 아래와 같이 작성하자.</p>
<div id="crayon-5cc2a145225bf103382935" class="crayon-syntax crayon-theme-classic crayon-font-monaco crayon-os-pc print-yes notranslate" data-settings=" minimize scroll-mouseover" style="margin: 12px 0px; padding: 0px; box-sizing: border-box; text-size-adjust: none; width: 607.594px; font-family: Monaco, MonacoRegular, &quot;Courier New&quot;, monospace; color: #676767; height: auto; overflow: hidden !important; position: relative !important; direction: ltr !important; border-width: 1px !important; border-color: #999999 !important; border-style: solid !important; text-shadow: none !important; background: rgb(253, 253, 253) !important; line-height: 15px !important;">
   <div class="crayon-toolbar" data-settings=" show" style="margin: 0px; padding: 0px; border-top: 0px; border-right: 0px; border-left: 0px; border-image: initial; width: 605.594px; position: relative; overflow: hidden; z-index: 4; background: rgb(221, 221, 221) !important; border-bottom: 1px solid rgb(187, 187, 187) !important; height: 18px !important; line-height: 18px !important;"><span class="crayon-title" style="margin: 0px; padding: 0px 4px !important; font-family: inherit; float: left; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #333333 !important;">/etc/modprobe.d/8192cu.conf</span>
      <div class="crayon-tools" style="margin: 0px; padding: 0px; font-family: inherit; background: 0px center; border: 0px; position: absolute; right: 0px; height: 18px !important; line-height: 18px !important; font-weight: inherit !important; float: right !important;">
         <div class="crayon-button crayon-nums-button crayon-pressed" title="줄 번호 토글" style="margin: 0px; padding: 0px; font-family: inherit; background: -24px 0px no-repeat rgb(188, 188, 188); border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; color: #ffffff; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) -24px -32px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-plain-button" title="일반 코드 토글" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -48px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-wrap-button" title="줄 바꿈 토글" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -112px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-copy-button" title="복사" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px -16px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         <div class="crayon-button crayon-popup-button" title="새 창에서 보기" style="margin: 0px; padding: 0px; font-family: inherit; background-image: initial; background-position: 0px center; background-size: initial; background-repeat: no-repeat; background-attachment: initial; background-origin: initial; background-clip: initial; border: 0px; height: inherit; line-height: 15px; display: inline; position: relative; width: 24px; font-size: inherit !important; font-weight: inherit !important; float: left !important;">
            <div class="crayon-button-icon" style="margin: -8px 0px 0px; padding: 0px; font-family: inherit; background: url(&quot;../images/toolbar/buttons.png&quot;) 0px 0px; border: 0px; width: 24px; position: absolute; left: 0px; top: 9px; height: 16px !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">&nbsp;</div>
            </div>
         </div>
      </div>
   <div class="crayon-plain-wrap" style="background: 0px center; border: 0px; margin: 0px !important; padding: 0px !important; height: auto !important;"><textarea wrap="soft" class="crayon-plain print-no" data-settings="dblclick" readonly="" style="margin: 0px; padding-top: 0px; padding-right: 5px; padding-left: 5px; vertical-align: middle; outline: none; width: 575.313px; border-width: 0px; border-style: initial; border-color: initial; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; box-shadow: none; min-width: 95%; max-width: 95%; height: 139px; overflow: hidden; position: absolute; opacity: 0; border-radius: 0px; white-space: pre; overflow-wrap: normal; resize: none; color: #000000; tab-size: 4; z-index: 0; font-size: 12px !important; font-family: Monaco, MonacoRegular, &quot;Courier New&quot;, monospace !important; line-height: 15px !important;"></textarea></div>
   <div class="crayon-main" style="margin: 0px; padding: 0px; background: 0px center; border: 0px; width: 605.594px; overflow: hidden; position: relative; z-index: 1;">
      <table class="crayon-table" style="margin-left: 0px; margin-top: 0px !important; margin-right: 0px !important; margin-bottom: 0px !important; padding: 0px !important; border-width: initial !important; border-style: none !important; border-color: initial !important; background: none !important; width: auto !important; border-spacing: 0px !important; table-layout: auto !important;">
         <tbody style="margin: 0px; padding: 0px;">
            <tr class="crayon-row" style="background: 0px center; margin: 0px !important; padding: 0px !important; border: none !important; vertical-align: top !important;">
               <td class="crayon-nums " data-settings="show" style="border-width: 0px; border-style: initial; border-color: initial; margin: 0px !important; padding: 0px !important; vertical-align: top !important; background: rgb(223, 239, 255) !important; color: #5499de !important;">
                  <div class="crayon-nums-content" style="margin: 0px; padding: 0px; background: 0px center; border: 0px; white-space: nowrap; line-height: 15px !important;">
                     <div class="crayon-num" data-line="crayon-5cc2a145225bf103382935-1" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">1</div>
                     <div class="crayon-num crayon-striped-num" data-line="crayon-5cc2a145225bf103382935-2" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: rgb(200, 225, 250) !important; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #317cc5 !important;">2</div>
                     <div class="crayon-num" data-line="crayon-5cc2a145225bf103382935-3" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">3</div>
                     <div class="crayon-num crayon-striped-num" data-line="crayon-5cc2a145225bf103382935-4" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: rgb(200, 225, 250) !important; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #317cc5 !important;">4</div>
                     <div class="crayon-num" data-line="crayon-5cc2a145225bf103382935-5" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">5</div>
                     <div class="crayon-num crayon-striped-num" data-line="crayon-5cc2a145225bf103382935-6" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: rgb(200, 225, 250) !important; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #317cc5 !important;">6</div>
                     <div class="crayon-num" data-line="crayon-5cc2a145225bf103382935-7" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">7</div>
                     <div class="crayon-num crayon-striped-num" data-line="crayon-5cc2a145225bf103382935-8" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: rgb(200, 225, 250) !important; border: 0px; text-align: center; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important; color: #317cc5 !important;">8</div>
                     </div>
                  </td>
               <td class="crayon-code" style="border-width: 0px; border-style: initial; border-color: initial; background: 0px center; width: 587px; margin: 0px !important; padding: 0px !important; vertical-align: top !important;">
                  <div class="crayon-pre" style="margin: 0px; padding: 0px; white-space: pre; overflow: visible; tab-size: 4; background: none !important; border: none !important; line-height: 15px !important;">
                     <div class="crayon-line" id="crayon-5cc2a145225bf103382935-1" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;"># rtw_power_mgnt={0|1|2}</div>
                     <div class="crayon-line crayon-striped-line" id="crayon-5cc2a145225bf103382935-2" style="margin: 0px; padding: 0px 5px; font-family: inherit; border: 0px; height: inherit; background: rgb(247, 247, 247) !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">#&nbsp;&nbsp;&nbsp;&nbsp;0 = disable Power Save Mode</div>
                     <div class="crayon-line" id="crayon-5cc2a145225bf103382935-3" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">#&nbsp;&nbsp;&nbsp;&nbsp;1 = enable Power Save, MIN_PS Mode</div>
                     <div class="crayon-line crayon-striped-line" id="crayon-5cc2a145225bf103382935-4" style="margin: 0px; padding: 0px 5px; font-family: inherit; border: 0px; height: inherit; background: rgb(247, 247, 247) !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">#&nbsp;&nbsp;&nbsp;&nbsp;2 = enable Power Save, MAX_PS Mode</div>
                     <div class="crayon-line" id="crayon-5cc2a145225bf103382935-5" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;"># rtw_enusbss={0|1}</div>
                     <div class="crayon-line crayon-striped-line" id="crayon-5cc2a145225bf103382935-6" style="margin: 0px; padding: 0px 5px; font-family: inherit; border: 0px; height: inherit; background: rgb(247, 247, 247) !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">#&nbsp;&nbsp;&nbsp;&nbsp;0 = disable auto suspend</div>
                     <div class="crayon-line" id="crayon-5cc2a145225bf103382935-7" style="margin: 0px; padding: 0px 5px; font-family: inherit; background: 0px center; border: 0px; height: inherit; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">#&nbsp;&nbsp;&nbsp;&nbsp;1 = enable auto suspend</div>
                     <div class="crayon-line crayon-striped-line" id="crayon-5cc2a145225bf103382935-8" style="margin: 0px; padding: 0px 5px; font-family: inherit; border: 0px; height: inherit; background: rgb(247, 247, 247) !important; font-size: inherit !important; line-height: inherit !important; font-weight: inherit !important;">options 8192cu rtw_power_mgnt=0 rtw_enusbss=0</div>
                     </div>
                  </td>
               </tr>
            </tbody>
         </table>
      </div>
   </div>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">주석에도 작성해 뒀지만, rtw_power_mgnt는 절전 모드의 설정으로, 0은 절전모드 해제, 1은 최소 절전 모드, 2는 최대 절전 모드로 설정한다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">rtw_enusbss의 경우, 나는 이 옵션 없이도 문제가 해결되었지만 내용상 설정해두는 것이 좋지 않을까 싶어서 설정했다. 무선 인터넷의 자동 중단 모드의 설정으로 생각되며, 0은 자동 중단 모드 해제, 1은 자동 중단 모드로 설정한다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">참고로 각 설정 항목들의 현재 설정 상태는, /sys/module/8192cu/parameters/{설정항목명}을 cat 명령으로 확인함으로써 조회할 수 있다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">여하튼 설정한 이후 라즈베리 파이를 재시작하면, 이후부터는 별다른 문제가 없을 경우 라즈베리 파이의 네트워크가 해제되지 않는다.</p>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">참고로, 8192cu.conf 파일에 설정할 수 있는 설정 내용은 다음과 같다. /sys/module/8192cu/parameters/ 디렉토리를 살펴본 바로는 이보다도 설정 항목의 가짓수가 훨씬 많을 것 같지만, 전부를 찾아내지는 못했다.</p>
<ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;); color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">
   <li style="margin: 5px 20px; padding: 0px;">rtw_power_mgnt={0|1|2}
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">0 == disable power saving</li>
         <li style="margin: 5px 20px; padding: 0px;">1 ==&nbsp;enable power saving, MIN_PS</li>
         <li style="margin: 5px 20px; padding: 0px;">2 == enable power saving, MAX_PS</li>
         </ul>
      </li>
   <li style="margin: 5px 20px; padding: 0px;">rtw_enusbss={0|1}
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">0 == disable auto suspend</li>
         <li style="margin: 5px 20px; padding: 0px;">1 == enable auto suspend</li>
         </ul>
      </li>
   <li style="margin: 5px 20px; padding: 0px;">rtw_hwpwrp_detect={0|1}
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">0 == disable H/W power pin detection</li>
         <li style="margin: 5px 20px; padding: 0px;">1 == enable H/W power pin detection</li>
         </ul>
      </li>
   <li style="margin: 5px 20px; padding: 0px;">rtw_ips_mode={0|1}
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">0 == low power, IPS_NORMAL</li>
         <li style="margin: 5px 20px; padding: 0px;">1 == higher power, IPS_LEVEL2</li>
         </ul>
      </li>
   </ul>
<p style="margin-top: 1em; margin-bottom: 1em; padding: 0px; color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">이 문서를 작성하는데에는 아래 웹사이트를 참고했다.</p>
<ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;); color: #676767; font-family: &quot;Nanum Gothic&quot;, PTSans, Arial, sans-serif; font-size: 14px; background-color: #ffffff;">
   <li style="margin: 5px 20px; padding: 0px;"><a href="http://raspberrypi.stackexchange.com/questions/1384" style="margin: 0px; padding: 0px; color: #de5f44; transition: color 0.5s ease 0s; text-decoration-line: none;" target="_blank">linux – How do I disable suspend mode? – Raspberry Pi Stack Exchange</a>
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">처음으로 이 문제에 대한 해결책을 발견한 사이트</li>
         </ul>
      </li>
   <li style="margin: 5px 20px; padding: 0px;"><a href="https://tasksofohm.wordpress.com/2012/09/22/power-management-on-the-raspberry-wlan-adapter/" style="margin: 0px; padding: 0px; color: #de5f44; transition: color 0.5s ease 0s; text-decoration-line: none;" target="_blank">Power management on the Raspberry WLAN adapter | TasksOfOhm</a>
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">해결방법 뿐만 아니라, rtw_power_mgnt 옵션의 값을 참고할 수 있었다</li>
         </ul>
      </li>
   <li style="margin: 5px 20px; padding: 0px;"><a href="https://www.raspberrypi.org/forums/viewtopic.php?t=61665" style="margin: 0px; padding: 0px; color: #de5f44; transition: color 0.5s ease 0s; text-decoration-line: none;" target="_blank">Raspberry Pi • View topic – Edimax Wifi adapter seems to go to sleep if not used (solved</a>
      <ul style="margin: 0px; padding: 0px; list-style-image: url(&quot;images/bullet.png&quot;);">
         <li style="margin: 5px 20px; padding: 0px;">rtw_power_mgnt 뿐만 아니라 그 외 몇가지 설정 값을 참고했다. 바로 나타나지는 않고, 좀 아래쪽에 관련 내용이 있다.</li>
         </ul>
      </li>
   </ul>