<ruby id="bdb3f"></ruby>

    <p id="bdb3f"><cite id="bdb3f"></cite></p>

      <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
        <p id="bdb3f"><cite id="bdb3f"></cite></p>

          <pre id="bdb3f"></pre>
          <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

          <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
          <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

          <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                <ruby id="bdb3f"></ruby>

                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                # **一、三種方法** ## **1.exec讀取文件** ```shell exec <file sum=0 while read line do cmd done ``` ## **2. cat讀取文件** ```shell cat file|while read line do cmd done ``` * 推薦用途: 通過awk等三劍客獲取文件中的數據后,可以使用這種方法用管道拋給while按行讀取 ## **3. while循環最后加重定向** ``` while read line do cmd done<file ``` * 推薦用途: 直接按行讀取文件中的內容時,推薦用此方法 # **二、案例** 讀取web日志文件,把日志文件中每行中的訪問字節數相加,統計訪問總量 * `cat /server/scripts/c9.sh` ```shell #!/bin/bash sum=0 exec <$1 while read line do size=`echo $line|awk '{print $10}'` expr $size + 1 &>/dev/null if [ $? -ne 0 ];then continue fi ((sum=sum+$size)) done echo "${1}:total:${sum}bytes =`echo $((${sum}/1024))`KB" ```
                  <ruby id="bdb3f"></ruby>

                  <p id="bdb3f"><cite id="bdb3f"></cite></p>

                    <p id="bdb3f"><cite id="bdb3f"><th id="bdb3f"></th></cite></p><p id="bdb3f"></p>
                      <p id="bdb3f"><cite id="bdb3f"></cite></p>

                        <pre id="bdb3f"></pre>
                        <pre id="bdb3f"><del id="bdb3f"><thead id="bdb3f"></thead></del></pre>

                        <ruby id="bdb3f"><mark id="bdb3f"></mark></ruby><ruby id="bdb3f"></ruby>
                        <pre id="bdb3f"><pre id="bdb3f"><mark id="bdb3f"></mark></pre></pre><output id="bdb3f"></output><p id="bdb3f"></p><p id="bdb3f"></p>

                        <pre id="bdb3f"><del id="bdb3f"><progress id="bdb3f"></progress></del></pre>

                              <ruby id="bdb3f"></ruby>

                              哎呀哎呀视频在线观看