{"id":719,"date":"2024-05-04T17:09:14","date_gmt":"2024-05-04T09:09:14","guid":{"rendered":"http:\/\/blue.yn.cn\/?p=719"},"modified":"2024-10-25T17:24:11","modified_gmt":"2024-10-25T09:24:11","slug":"%e6%b5%81%e7%a8%8b%e6%8e%a7%e5%88%b6-if-case","status":"publish","type":"post","link":"http:\/\/blue.yn.cn\/?p=719","title":{"rendered":"\u6d41\u7a0b\u63a7\u5236-if-case"},"content":{"rendered":"<h3>if\u5224\u65ad\u8bed\u53e5<\/h3>\n<h4>\u4ec0\u4e48\u662fif<\/h4>\n<ul>\n<li><code>if<\/code>\u5c31\u662f\u6a21\u4eff\u4eba\u7c7b\u7684\u5224\u65ad\u6765\u8fdb\u884c\u7684\uff0c\u4f46\u5b83\u6ca1\u6709\u4eba\u7c7b\u90a3\u4e48\u6709\u60c5\u611f\uff0c\u53ea\u6709<code>True<\/code>\u548c<code>False<\/code>\u8fd9\u4e24\u79cd\u7ed3\u679c<\/li>\n<\/ul>\n<h4>\u4e3a\u4f55\u8981\u4f7f\u7528if<\/h4>\n<ul>\n<li>\u5f53\u6211\u4eec\u5728\u5199\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u9700\u8981\u5bf9\u4e0a\u4e00\u6b65\u7684\u6267\u884c\u7ed3\u679c\u8fdb\u884c\u5224\u65ad\uff0c\u90a3\u4e48\u5224\u65ad\u5c31\u9700\u8981\u4f7f\u7528<code>if<\/code>\u8bed\u53e5\u6765\u5b9e\u73b0<\/li>\n<li><code>if<\/code>\u8bed\u53e5\u5728\u6211\u4eec\u7a0b\u5e8f\u4e2d\u4e3b\u8981\u5c31\u662f\u7528\u6765\u505a\u5224\u65ad\u7684<\/li>\n<li>\u4e0d\u7ba1\u5927\u5bb6\u4ee5\u540e\u5b66\u4e60\u4ec0\u4e48\u8bed\u8a00\uff0c\u4ee5\u540e\u53ea\u8981\u6d89\u53ca\u5230\u5224\u65ad\u7684\u90e8\u5206\uff0c\u5927\u5bb6\u5c31\u53ef\u4ee5\u76f4\u63a5\u62ff<code>if<\/code>\u6765\u4f7f\u7528<\/li>\n<li>\u4e0d\u540c\u7684\u8bed\u8a00\u4e4b\u95f4\u7684<code>if<\/code>\u53ea\u662f\u8bed\u6cd5\u4e0d\u540c\uff0c\u539f\u7406\u662f\u76f8\u540c\u7684<\/li>\n<\/ul>\n<h4>if\u7684\u57fa\u7840\u8bed\u6cd5<\/h4>\n<h5>\u5355\u5206\u652f\u7ed3\u6784<\/h5>\n<pre><code class=\"language-bash\"># \u5355\u5206\u652f\u4ee3\u7801\u793a\u4f8b\nif [ $1 -eq $2 ];then\n    echo &quot;ok&quot;\nfi<\/code><\/pre>\n<h5>\u53cc\u5206\u652f\u7ed3\u6784<\/h5>\n<pre><code class=\"language-bash\"># \u53cc\u5206\u652f\u4ee3\u7801\u793a\u4f8b\nif [ $1 -eq $2 ];then\n    echo &quot;ok!&quot;\n  else\n    echo &quot;error!&quot;\nfi<\/code><\/pre>\n<h5>\u591a\u5206\u652f\u7ed3\u6784<\/h5>\n<pre><code class=\"language-bash\"># \u591a\u5206\u679d\u4ee3\u7801\u793a\u4f8b\nif [ \u5982\u679c\u4f60\u6709\u623f ];then\n    \u6211\u5c31\u5ac1\u7ed9\u4f60\n  elif[ \u4f60\u6709\u8f66 ];then\n    \u6211\u5c31\u5ac1\u7ed9\u4f60\n  elif[ \u4f60\u6709\u94b1 ];then\n    \u6211\u5c31\u5ac1\u7ed9\u4f60\n  else\n    \u518d\u89c1\nfi<\/code><\/pre>\n<h4>if\u5206\u652f\u573a\u666f<\/h4>\n<h5>\u5355\u5206\u652f\u811a\u672c\u6848\u4f8b<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u5224\u65ad\u5f53\u524d\u7528\u6237\u662f\u4e0d\u662f<code>root<\/code>\uff0c\u5982\u679c\u4e0d\u662f\u90a3\u4e48\u8fd4\u56de<code>error<\/code><\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_1.sh\n#!\/usr\/bin\/bash\n\nif [ $USER != &#039;root&#039; ];then\n    echo &quot;error&quot;\n    exit 1\nfi<\/code><\/pre>\n<h5>\u53cc\u5206\u652f\u811a\u672c\u6848\u4f8b<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u5224\u65ad\u5f53\u524d\u767b\u5f55\u7528\u6237\u662f\u7ba1\u7406\u5458\u8fd8\u662f\u666e\u901a\u7528\u6237\n<ul>\n<li>\u5982\u679c\u662f\u7ba1\u7406\u5458\u8f93\u51fa<code>hey admin<\/code><\/li>\n<li>\u5982\u679c\u662f\u666e\u901a\u7528\u6237\u8f93\u51fa<code>hey guest<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_2.sh\n#!\/usr\/bin\/bash\n\nif [ $USER == &#039;root&#039; ];then\n    echo &quot;hey admin&quot;\n  else\n    echo &quot;hey guest&quot;\nfi<\/code><\/pre>\n<h5>\u591a\u5206\u652f\u811a\u672c\u6848\u4f8b<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u901a\u8fc7\u811a\u672c\u4f20\u5165\u4e24\u4e2a\u6574\u6570\u53c2\u6570\uff0c\u8fdb\u884c\u6574\u6570\u5173\u7cfb\u6bd4\u8f83<\/li>\n<li>\u8bf7\u4f7f\u7528\u53cc\u5206\u652f\u548c\u591a\u5206\u652f\u4e24\u79cd\u65b9\u5f0f\u5b9e\u73b0<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_3.sh\n#!\/usr\/bin\/bash\n\n# \u53cc\u5206\u652f\uff0c\u5d4c\u5957if\u65b9\u5f0f\u5b9e\u73b0\nif [ $1 -eq $2 ];then\n    echo &quot;$1 = $2&quot;\nelse\n    if [ $1 -gt $2 ];then\n        echo &quot;$1 &gt; $2&quot;\n    else\n        echo &quot;$1 &lt; $2&quot;\n    fi\nfi<\/code><\/pre>\n<ul>\n<li>\u591a\u5206\u652f\u7ed3\u6784\u5b9e\u73b0<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_4.sh\n#!\/usr\/bin\/bash\n\nif [ $1 -eq $2 ];then\n    echo &quot;$1 = $2&quot;\n  elif [ $1 -gt $2 ];then\n    echo &quot;$1 &gt; $2&quot;\n  else\n    echo &quot;$1 &lt; $2&quot;\nfi<\/code><\/pre>\n<h4>if\u57fa\u4e8e\u6587\u4ef6\u6bd4\u8f83<\/h4>\n<ul>\n<li><code>if<\/code>\u8bed\u53e5\u4e2d\u7684\u6587\u4ef6\u6bd4\u8f83\n<ul>\n<li><code>-e<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u6216\u76ee\u5f55\u5b58\u5728\u5219\u4e3a\u771f<\/li>\n<li><code>-s<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u5b58\u5728\u4e14\u81f3\u5c11\u6709\u4e00\u4e2a\u5b57\u7b26\u5219\u4e3a\u771f<\/li>\n<li><code>-d<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u5b58\u5728\u4e14\u4e3a\u76ee\u5f55\u5219\u4e3a\u771f<\/li>\n<li><code>-f<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u5b58\u5728\u4e14\u4e3a\u666e\u901a\u6587\u4ef6\u5219\u4e3a\u771f<\/li>\n<li><code>-r<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u5b58\u5728\u4e14\u4e3a\u53ef\u8bfb\u5219\u4e3a\u771f<\/li>\n<li><code>-w<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u5b58\u5728\u4e14\u4e3a\u53ef\u5199\u5219\u4e3a\u771f<\/li>\n<li><code>-x<\/code>\uff1a\u5982\u679c\u6587\u4ef6\u5b58\u5728\u4e14\u4e3a\u53ef\u6267\u884c\u5219\u4e3a\u771f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>\u5907\u4efd\u811a\u672c\u6848\u4f8b-1<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u5907\u4efd\u6587\u4ef6\u81f3<code>\/backup\/system\/filename-2024-5-5<\/code>,\u5982\u679c\u8be5\u76ee\u5f55\u4e0d\u5b58\u5728\u5219\u81ea\u52a8\u521b\u5efa<\/li>\n<li>\u6e90\u6587\u4ef6\uff0c\u8ba9\u7528\u6237\u624b\u52a8\u8f93\u5165<\/li>\n<li>\u76ee\u6807\u4f4d\u7f6e\uff1a<code>\/backup\/system\/<\/code>\u5224\u65ad\uff0c\u5224\u65ad\u8be5\u76ee\u5f55\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5219\u521b\u5efa<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_5.sh\n#!\/usr\/bin\/bash\n\nDest_Dir=\/backup\/system\/\nDate=$(date +%F)\n\nread -p &quot;\u8bf7\u8f93\u5165\u4f60\u8981\u5907\u4efd\u7684\u6587\u4ef6\uff1a&quot; Src_File\nread -p &quot;\u662f\u5426\u5c06$Src_File\u6587\u4ef6\u5907\u4efd\u4e3a$Dest_Dir$Src_File-$Date? [ yes | no ]&quot; action\n\nif [ ! -d $Dest_Dir ];then\n        mkdir -p $Dest_Dir\nfi\n\nif [ $action == yes ];then\n        cp -rpv $Src_File $Dest_Dir$Src_File-$Date\nfi<\/code><\/pre>\n<h5>\u5907\u4efd\u811a\u672c\u6848\u4f8b-2<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u7ee7\u4e0a\uff0c\u5224\u65ad\u5907\u4efd\u7684\u6587\u4ef6\u662f\u5426\u5b58\u5728\n<ul>\n<li>\u5982\u679c\u5907\u4efd\u6587\u4ef6\u5b58\u5728\u5219\u7ee7\u7eed<\/li>\n<li>\u5982\u679c\u5907\u4efd\u6587\u4ef6\u4e0d\u5b58\u5728\u5219\u63d0\u793a<code>No Such file<\/code>\uff0c\u7136\u540e\u9000\u51fa<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_5.sh\n#!\/usr\/bin\/bash\n\nDest_Dir=\/backup\/system\/\nDate=$(date +%F)\n\nread -p &quot;\u8bf7\u8f93\u5165\u4f60\u8981\u5907\u4efd\u7684\u6587\u4ef6\uff1a&quot; Src_File\n\n# \u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u8def\u5f84\u662f\u5426\u5b58\u5728\uff0c\u662f\u5426\u662f\u4e00\u4e2a\u6587\u4ef6\nif [ ! -f ${Src_File} ];then\n    echo &quot;No Such File ${Src_File} !&quot;\n    exit\nfi\n\nread -p &quot;\u662f\u5426\u5c06${Src_file} \u6587\u4ef6\u5907\u4efd\u5230 ${Dest_Dir}\/filename-${Date} [ yes | no ]&quot; Action\n\nif [ ! -d $Dest_Dir ];then\n        mkdir -p $Dest_Dir\nfi\n\nif [ $action == yes ];then\n        cp -rpv $Src_File $Dest_Dir$Src_File-$Date\nfi<\/code><\/pre>\n<h5>\u5907\u4efd\u811a\u672c\u6848\u4f8b-3<\/h5>\n<ul>\n<li>\u9700\u6c423\uff1a\u7ee7\u4e0a\u9700\u6c42\uff0c\u5224\u65ad\u5907\u4efd\u7684\u6587\u4ef6\u662f\u5426\u4e3a\u7a7a\n<ul>\n<li>\u5982\u679c\u5907\u4efd\u6587\u4ef6\u4e0d\u4e3a\u7a7a\u5219\u7ee7\u7eed<\/li>\n<li>\u5982\u679c\u5907\u4efd\u6587\u4ef6\u4e3a\u7a7a\uff0c\u5219\u63d0\u793a<code>This is empty file<\/code>\uff0c\u7136\u540e\u9000\u51fa<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat if_5.sh\n#!\/usr\/bin\/bash\n\nDest_Dir=\/backup\/system\/\nDate=$(date +%F)\n\nread -p &quot;\u8bf7\u8f93\u5165\u4f60\u8981\u5907\u4efd\u7684\u6587\u4ef6\uff1a&quot; Src_File\n\n# \u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u8def\u5f84\u662f\u5426\u5b58\u5728\uff0c\u662f\u5426\u662f\u4e00\u4e2a\u6587\u4ef6\nif [ ! -f ${Src_File} ];then\n    echo &quot;No Such File ${Src_File} !&quot;\n    exit\nfi\n\n# \u5224\u65ad\u6587\u4ef6\u4e3a\u7a7a\uff0c\u5219\u62a5\u9519\u9000\u51fa\u811a\u672c\nif [ ! -s ${Src_File} ];then\n    echo &quot;This ${Src_File} is empty file!&quot;\n    exit\nfi\n\nread -p &quot;\u662f\u5426\u5c06${Src_file} \u6587\u4ef6\u5907\u4efd\u5230 ${Dest_Dir}\/filename-${Date} [ yes | no ]&quot; Action\n\nif [ ! -d $Dest_Dir ];then\n        mkdir -p $Dest_Dir\nfi\n\nif [ $action == yes ];then\n        cp -rpv $Src_File $Dest_Dir$Src_File-$Date\nfi<\/code><\/pre>\n<h5>\u4e3a\u6267\u884c\u811a\u672c\u52a0\u9501<\/h5>\n<pre><code class=\"language-bash\">cat lock.sh\n#!\/usr\/bin\/bash\n\n# \u5224\u65ad\u662f\u5426\u5b58\u5728\u9501\nif [ -f \/tmp\/test.lock ];then\n   echo &quot;\u8be5\u811a\u672c\u6b63\u5728\u8fd0\u884c\uff0c\u8bf7\u7a0d\u540e...&quot;\n   exit\nfi\n\n# \u52a0\u9501\ntouch \/tmp\/test.lock\n\n### \u4e1a\u52a1\u903b\u8f91\nsleep 20\n\n# \u89e3\u9501\nif [ -f \/tmp\/test.lock ];then\n    rm -f \/tmp\/test.lock\nfi<\/code><\/pre>\n<h4>if\u57fa\u4e8e\u6574\u6570\u6bd4\u8f83<\/h4>\n<ul>\n<li><code>if<\/code>\u8bed\u53e5\u4e2d\u7684\u6574\u6570\u6bd4\u8f83 [ \u6574\u65701 \u64cd\u4f5c\u7b26 \u6574\u65702 ] <code>equal to\uff1bgreat than\uff1bless than<\/code>\n<ul>\n<li><code>-eq<\/code>\uff1a\u7b49\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b\uff1a<code>[ 1 -eq 10 ]<\/code><\/li>\n<li><code>-ne<\/code>\uff1a\u4e0d\u7b49\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b\uff1a<code>[ 1 -ne 10 ]<\/code><\/li>\n<li><code>-gt<\/code>\uff1a\u5927\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b\uff1a<code>[ 1 -gt 10 ]<\/code><\/li>\n<li><code>-lt<\/code>\uff1a\u5c0f\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b\uff1a<code>[ 1 -lt 10 ]<\/code><\/li>\n<li><code>-ge<\/code>\uff1a\u5927\u4e8e\u7b49\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b\uff1a<code>[ 1 -ge 10 ]<\/code><\/li>\n<li><code>-le<\/code>\uff1a\u5c0f\u4e8e\u7b49\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b\uff1a<code>[ 1 -le 10 ]<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>\u68c0\u6d4b\u670d\u52a1\u72b6\u6001\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u7528\u6237\u6267\u884c\u811a\u672c<code>sh status.sh nginx<\/code>\u5219\u68c0\u67e5<code>nginx<\/code>\u670d\u52a1\u7684\u8fd0\u884c\u72b6\u6001\uff08\u4ec5\u652f\u6301\u4f20\u9012\u4e00\u4e2a\u53c2\u6570\uff09<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat status.sh\n#!\/usr\/bin\/bash\n\nif [ $# -ne 1 ];then\n    echo &quot;USAGE:$0 [ nginx | zabbix-agent2 | chronyd | mariadb | httpd | vsftpd | Service_Name... ]&quot;\n    exit\nfi\n\nsystemctl status $1 &amp;&gt; \/dev\/null\nresult=$?\n\nif [ $result -eq 4 ];then\n    echo &quot;$1 \u670d\u52a1\u6ca1\u6709\u5b89\u88c5...&quot;\nelif [ $result -eq 3 ];then\n     echo &quot;$1 \u670d\u52a1\u6ca1\u6709\u542f\u52a8...&quot;\nelif [ $result -eq 0 ];then\n     echo &quot;$1 \u670d\u52a1\u5df2\u7ecf\u542f\u52a8...&quot;\nfi<\/code><\/pre>\n<h5>\u83b7\u53d6linux\u7248\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u83b7\u53d6linux\u7248\u672c<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat release.sh\n#!\/usr\/bin\/bash\n\nsystem_status=$(cat \/etc\/redhat-release  | awk &#039;{print $(NF-1)}&#039;)\n\nif [ ${system_status%%.*} -eq 7 ];then\n        echo &quot;linux 7&quot;\nelif [ ${system_status%%.*} -eq 6 ];then\n        echo &quot;linux 6&quot;\nfi<\/code><\/pre>\n<h5>\u83b7\u53d6\u8fdb\u7a0b\u8be6\u60c5\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u83b7\u53d6\u8fdb\u7a0b\u7684\u8be6\u60c5\n<ul>\n<li>1.\u9996\u5148\u8981\u4f20\u9012\u53c2\u6570\uff0c1\u4e2a\uff0c\u670d\u52a1\u7684\u540d\u79f0<\/li>\n<li>2.\u5224\u65ad\uff1a\u662f\u5426\u5b58\u5728\u8be5\u8fdb\u7a0b\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u8b66\u544a\uff0c\u7136\u540e\u9000\u51fa\u811a\u672c<\/li>\n<li>3.\u83b7\u53d6\u8fdb\u7a0b\u7684<code>pid<\/code>\u76f8\u5173\u7684\u4fe1\u606f\uff1b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat process.sh\n#!\/usr\/bin\/bash\n\nif [ $# -ne 1 ];then\n        echo &quot;USAGE: $0 [ nginx | zabbix-agent2 | sshd | php-fpm | ... ]&quot;\n        exit\nfi\n\nget_service=$(pidof $1 | wc -l)\n\nif [ $get_service -ge 1 ];then\n        ps -ef | grep -v grep | egrep &quot;$( pidof $1 | sed &#039;s# #|#g&#039;)&quot; &gt; \/tmp\/$1_status.txt\n        echo &quot;\u6253\u5370\u5f53\u524d $1 \u8fdb\u7a0b\u7684\u8be6\u60c5...&quot;\n        sleep 1; echo &quot;&quot;\n\n        cat \/tmp\/$1_status.txt &amp;&amp; rm -f \/tmp\/$1_status.txt\nelse\n        echo &quot;$1 \u670d\u52a1\u6ca1\u6709\u8fdb\u7a0b\u8be6\u60c5...&quot;\nfi<\/code><\/pre>\n<h5>\u6570\u5b57\u6392\u5e8f\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u8f93\u5165\u4e09\u4e2a\u6570\u5e76\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\n<ul>\n<li>1.\u63a7\u5236\u53ea\u80fd\u8f93\u5165\u4e09\u4e2a\u53c2\u6570<\/li>\n<li>2.\u5c06\u884c\uff0c\u8f6c\u4e3a\u5217\u7684\u663e\u793a\u65b9\u5f0f<\/li>\n<li>3.<code>sort<\/code>\u6392\u5e8f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat sort.sh\n#!\/usr\/bin\/bash\n\nif [ $# -ne 3 ];then\n        echo &quot;\u8bf7\u4f20\u9012\u4e09\u4e2a\u53c2\u6570&quot;\n        exit\nelse\n        echo &quot;$1 $2 $3&quot; | xargs -n1 | sort -n\nfi<\/code><\/pre>\n<h4>if\u57fa\u4e8e\u5b57\u7b26\u6bd4\u8f83<\/h4>\n<ul>\n<li><code>if<\/code>\u8bed\u53e5\u4e2d\u7684\u5b57\u7b26\u4e32\u6bd4\u8f83[ \u5b57\u7b261 \u64cd\u4f5c\u7b26 \u5b57\u7b262 ]\n<ul>\n<li><code>==<\/code>\uff1a\u7b49\u4e8e\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b`[ $a == $b ]<\/li>\n<li><code>!=<\/code>\uff1a\u4e0d\u76f8\u7b49\u5219\u6761\u4ef6\u4e3a\u771f\uff0c\u793a\u4f8b<code>[ $a != $b ]<\/code><\/li>\n<li><code>-z<\/code>\uff1a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4e3a\u96f6\u5219\u4e3a\u771f\uff08\u5185\u5bb9\u7a7a\u5219\u4e3a\u771f\uff09\uff0c\u793a\u4f8b<code>[ -z $a ]<\/code><\/li>\n<li><code>-n<\/code>\uff1a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4e0d\u4e3a\u7a7a\u5219\u4e3a\u771f\uff08\u6709\u5185\u5bb9\u5219\u4e3a\u771f\uff09\uff0c\u793a\u4f8b<code>[ -n $a ]<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>\u68c0\u67e5\u6267\u884c\u8eab\u4efd\u662f\u5426\u4e3aroot<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u5224\u65ad\u7528\u6237\u662f\u5426\u4e3a<code>root<\/code>\u8d85\u7ea7\u7ba1\u7406\u5458\n<ul>\n<li>\u5982\u679c\u662f\u5219\u63d0\u793a<code>hey admin<\/code><\/li>\n<li>\u5982\u679c\u4e0d\u662f\u5219\u63d0\u793a<code>hey guest<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat root.sh\n#!\/usr\/bin\/bash\n\nif [ $USER == root ];then\n        echo &quot;hey admin&quot;\nelse\n        ehco &quot;hey guest&quot;\nfi\n\n# \u4e0d\u7b49\u4e8e\u5199\u6cd5!=\ncat root-2.sh\n#!\/usr\/bin\/bash\n\nif [ $USER != root ];then\n    echo &quot;ERROR&quot;\n    exit\nfi<\/code><\/pre>\n<h5>\u5224\u65ad\u7528\u6237\u8f93\u5165\u662f\u5426\u4e3a\u7a7a\u811a\u672c<\/h5>\n<pre><code class=\"language-bash\">cat zero.sh\n#!\/usr\/bin\/bash\n\nread -p &quot;\u8bf7\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\uff1a&quot; action\n\nif [ -z $action ];then\n        echo &quot;\u8bf7\u4e0d\u8981\u76f4\u63a5\u56de\u8f66...&quot;\n        exit\nelse\n        echo &quot;\u4f60\u8f93\u5165\u7684\u662f $action &quot;\nfi<\/code><\/pre>\n<h5>\u68c0\u67e5selinux\u662f\u5426\u4e3adisabled<\/h5>\n<p>\u68c0\u67e5\u662f\u5426\u4e3a<code>disabled<\/code>\u72b6\u6001<br \/>\n\u662f\uff1a\u5219\u8f93\u51fa\u8be5\u72b6\u6001\u5df2\u7ecf\u662f<code>disabled<\/code>\uff0c\u4e0d\u505a\u4fee\u6539\uff1b<br \/>\n\u5426\uff1a\u5219\u4fee\u6539\u72b6\u6001\u4e3a<code>disabled<\/code>\uff0c\u5e76\u8fd4\u56de\u4e00\u6bb5\u63d0\u793a\uff0c\u8bf4<code>selinux<\/code>\u5df2\u7ecf\u4fee\u6539\u4e3a<code>disabled<\/code><\/p>\n<pre><code class=\"language-bash\">cat selinux.sh\n#!\/usr\/bin\/bash\n\nselinux_file=\/etc\/selinux\/config\nselinux_status=$(grep &quot;^SELINUX=&quot; $selinux_file | awk -F &#039;=&#039; &#039;{print $NF}&#039;)\n\nif [ $selinux_status != disabled ];then\n        sed -i &#039;\/^SELINUX=\/c SELINUX=disabled&#039; $selinux_file\n        echo &quot;selinux\u5df2\u4fee\u6539\u4e3adisabled\u72b6\u6001&quot;\nelse\n        echo &quot;selinux\u5df2\u7ecf\u662fdisabled\u72b6\u6001\uff0c\u65e0\u9700\u4fee\u6539&quot;\nfi<\/code><\/pre>\n<h4>if\u57fa\u4e8e\u6b63\u5219\u6bd4\u8f83<\/h4>\n<ul>\n<li><code>if<\/code>\u8bed\u53e5\u4e2d\u7684\u6b63\u5219\u6bd4\u8f83 <code>[[ \u53d8\u91cf =~ \u6b63\u5219\u5339\u914d\u7684\u5185\u5bb9 ]]<\/code>\n<ul>\n<li><code>[[ $USER =~ ^r ]]<\/code>\uff1a\u5224\u65ad\u7528\u6237\u662f\u5426\u5df2<code>r<\/code>\u5f00\u5934<\/li>\n<li><code>[[ $num =~ ^[0-9]+$ ]]<\/code>\uff1a\u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u662f\u5426\u4e3a\u5168\u6570\u5b57<\/li>\n<\/ul>\n<\/li>\n<li>\u6ce8\u610f\uff1a\u5355\u4e2d\u62ec\u53f7\u4f7f\u7528\u6b63\u5219\u8bed\u6cd5\u4f1a\u62a5\u9519<\/li>\n<\/ul>\n<h5>\u63a7\u5236\u7528\u6237\u8f93\u5165\u5fc5\u987b\u4e3a\u6574\u6570\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u901a\u8fc7\u6b63\u5219\u65b9\u5f0f\u63a7\u5236\u7528\u6237\u8f93\u5165\u7684\u5fc5\u987b\u662f\u6570\u5b57<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat number.sh\n#!\/usr\/bin\/bash\n\nread -p &quot;\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u503c\uff1a&quot; num\nif [[ ! $num =~ ^[0-9]+$ ]];then\n        echo &quot;\u4f60\u8f93\u5165\u7684\u4e0d\u662f\u6570\u5b57\uff0c\u7a0b\u5e8f\u9000\u51fa\uff01\uff01\uff01&quot;\n        exit\nfi\necho &quot;\u4f60\u8f93\u5165\u7684\u6570\u5b57\u662f\uff1a$num&quot;<\/code><\/pre>\n<h5>\u904d\u5386\u5355\u8bcd\u7b5b\u9009\u5176\u4e2d\u5173\u952e\u5b57\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u4f7f\u7528<code>for<\/code>\u5faa\u73af\u6253\u5370\u4e00\u5806\u5355\u8bcd\uff0c\u7136\u540e\u4ec5\u8f93\u51fa\u4ee5<code>r<\/code>\u5f00\u5934\u7684\u5355\u8bcd<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat r.sh\n#!\/usr\/bin\/bash\n\nfor var in ab ac rx bx rvv vt root\ndo\n        if [[ $var =~ ^r ]];then\n                echo $var\n        fi\ndone<\/code><\/pre>\n<h5>\u6279\u91cf\u521b\u5efa\u7528\u6237\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u7f16\u5199\u4e00\u4e2a\u521b\u5efa\u7528\u6237\u7684\u811a\u672c\n<ul>\n<li>1.\u63d0\u793a\u7528\u6237\u8f93\u5165\u8981\u521b\u5efa\u7528\u6237\u7684\u524d\u7f00\uff0c\u5fc5\u987b\u662f\u82f1\u6587<\/li>\n<li>2.\u63d0\u793a\u7528\u6237\u8f93\u5165\u540e\u7f00\uff0c\u5fc5\u987b\u662f\u6570\u5b57<\/li>\n<li>3.\u5982\u679c\u524d\u7f00\u548c\u540e\u7f00\u90fd\u6ca1\u6709\u95ee\u9898\uff0c\u5219\u8fdb\u884c\u7528\u6237\u521b\u5efa<\/li>\n<li>4.\u5e76\u4e14\u5bc6\u7801\u662f\u968f\u673a\u7684<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat useradd_batch.sh\n#!\/usr\/bin\/bash\n. \/etc\/init.d\/functions\n\nread -p &quot;\u8bf7\u8f93\u5165\u7528\u6237\u7684\u524d\u7f00\uff1a&quot; qz\n# \u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u524d\u7f00\nif [[ ! $qz =~ ^[a-z]+$  ]];then\n        echo &quot;\u4f60\u8f93\u5165\u7684\u4e0d\u662f\u7eaf\u82f1\u6587...&quot;\n        exit 1\nfi\n\nread -p &quot;\u8bf7\u8f93\u5165\u7528\u6237\u7684\u540e\u7f00\uff1a&quot; hz\nif [[ ! $hz =~ ^[0-9]+$ ]];then\n        echo &quot;\u4f60\u8f93\u5165\u7684\u4e0d\u662f\u7eaf\u6570\u5b57...&quot;\n        exit 2\nfi\n\n#\u5f00\u59cb\u62fc\u63a5\u7528\u6237\u8f93\u5165\u7684\u524d\u7f00+\u540e\u7f00=user_name\u53d8\u91cf\nuser_name=$qz$hz\nid $user_name &amp;&gt; \/dev\/null\nif [ $? -eq 0 ];then\n        echo &quot; $user_name \u7528\u6237\u5df2\u5b58\u5728&quot;\n        exit 3\nelse\n        useradd $user_name\n        action &quot;$user_name \u7528\u6237\u521b\u5efa\u6210\u529f&quot; \/bin\/true\nfi<\/code><\/pre>\n<h3>if\u5224\u65ad\u76f8\u5173\u811a\u672c\u6848\u4f8b<\/h3>\n<h4>\u5907\u4efd\u811a\u672c\u573a\u666f<\/h4>\n<ul>\n<li>\u9700\u6c42\uff1a\u5728\u6bcf\u6708\u7b2c\u4e00\u5929\u5907\u4efd\u5e76\u538b\u7f29<code>\/etc<\/code>\u76ee\u5f55\u7684\u6240\u6709\u5185\u5bb9\uff0c\u5b58\u653e\u5230<code>\/opt\/bak<\/code>\u76ee\u5f55\uff0c\u5b58\u653e\u7684\u5f62\u5f0f<code>2024_06_16_etc.tar.gz<\/code>\uff0c\u811a\u672c\u540d\u79f0\u4e3a<code>fileback<\/code>\uff0c\u5b58\u653e\u5728<code>\/root<\/code>\u7684\u5bb6\u76ee\u5f55\u4e0b\n<ul>\n<li>1.\u501f\u52a9\u5b9a\u65f6\u4efb\u52a1<\/li>\n<li>2.\u5224\u65ad<code>\/opt\/bak<\/code>\u662f\u5426\u5b58\u5728<\/li>\n<li>3.<code>tar czf \/opt\/bak\/datetime_etc.tar.gz etc<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat fileback.sh\n#!\/usr\/bin\/bash\n\nDate=$(date +%F)\nDir=\/opt\/bak\nLock_File=\/tmp\/back.lock\nLog_File=\/var\/log\/${0}.log\nLog_Format=&quot;$(date +%F_%T) $(hostname) $0:&quot;\n\n# 1.\u5224\u65ad\u64cd\u4f5c\u7684\u7528\u6237\u8eab\u4efd\nif [ ! $USER == &quot;root&quot; ];then\n        Log_Format=&quot;$(date +%F_%T) $(hostname) $0:&quot;\n        echo &quot;$Log_Format \u8bf7\u4f7f\u7528root\u8eab\u4efd\u8fd0\u884c...&quot; &gt;&gt; ${Log_File}\n        exit\nelse\n        Log_Format=&quot;$(date +%F_%T) $(hostname) $0:&quot;\n        echo &quot;$Log_Format root\u5f00\u59cb\u6267\u884c\u5907\u4efd\u811a\u672c---&gt;&quot; &gt;&gt; ${Log_File}\nfi\n\n# 2.\u52a0\u9501\nif [ -f $Lock_File ];then\n        echo &quot;\u8be5\u811a\u672c $0 \u6b63\u5728\u6267\u884c\u5907\u4efd\u64cd\u4f5c---&gt;&quot;\n        exit\nfi\n\n# \u7b2c\u4e00\u6b21\u5907\u4efd\u65f6\uff0c\u6ca1\u6709\u9501\uff0c\u6240\u4ee5\u9700\u8981\u6dfb\u52a0\ntouch $Lock_File\n\n# 3.\u5224\u65ad\u5907\u4efd\u7684\u76ee\u5f55\u662f\u5426\u5b58\u5728\nif [ ! -d $Dir ];then\n        mkdir -p $Dir\nfi\n\n# 4.\u6267\u884ctar\u6253\u5305\nLog_Format=&quot;$(date +%F_%T) $(hostname) $0:&quot;\necho &quot;$Log_Format root\u5f00\u59cb\u6267\u884ctar\u547d\u4ee4\u6253\u5305---&gt;&quot; &gt;&gt; ${Log_File}\nsleep 2\ncd \/ &amp;&amp; tar czf ${Dir}\/${Date}_etc.tar.gz etc\nif [ -f ${Dir}\/${Date}_etc.tar.gz ];then\n        Log_Format=&quot;$(date +%F_%T) $(hostname) $0:&quot;\n        echo &quot;$Log_Format \u5907\u4efd\u6587\u4ef6 ${Dir}\/${Date}_etc.tar.gz \u6210\u529f---&gt;&quot; &gt;&gt; ${Log_File}\nelse\n        Log_Format=&quot;$(date +%F_%T) $(hostname) $0:&quot;\n        echo &quot;$Log_Format \u5907\u4efd\u6587\u4ef6 ${Dir}\/${Date}_etc.tar.gz \u5931\u8d25---&gt;&quot; &gt;&gt; ${Log_File}\nfi\n\n# 5.\u7a0b\u5e8f\u6267\u884c\u6210\u529f\u540e\u8bb0\u5f97\u89e3\u9501\nrm -f $Lock_File<\/code><\/pre>\n<h4>\u521b\u5efa\u968f\u673a\u5bc6\u7801\u811a\u672c<\/h4>\n<ul>\n<li>\u9700\u6c42\uff1a\u6839\u636e\u7528\u6237\u8f93\u5165\u5bc6\u7801\u4f4d\u6570\uff0c\u751f\u6210\u968f\u673a\u5bc6\u7801\uff08\u5305\u542b\u6570\u5b57\u3001\u5927\u5c0f\u5199\u5b57\u6bcd\u3001\u7279\u6b8a\u7b26\u53f7\uff09\n<ul>\n<li>1.\u600e\u4e48\u751f\u6210\u968f\u673a\u6570\uff0c<code>mkpasswd -l 8<\/code><\/li>\n<li>2.\u63a7\u5236\u8f93\u5165\u7684\u957f\u5ea6\uff0c\u6700\u5c118\u4f4d\uff0c\u6700\u591a20\u4f4d<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat mkpasswd.sh\n#!\/usr\/bin\/bash\n\nread -p &quot;\u8bf7\u8f93\u5165\u4f60\u60f3\u751f\u6210\u7684\u968f\u673a\u6570\u5bc6\u7801\u4f4d\u6570\uff1a&quot; Action\n\nif [[ ! $Action =~ ^[0-9]+$ ]];then\n        echo &quot;\u8bf7\u8f93\u5165\u6570\u5b57...&quot;\n        exit\nfi\n\nif [ $Action -ge 8 -a $Action -le 20 ];then\n        mkpasswd -l $Action\nelse\n        echo &quot;\u5bc6\u7801\u957f\u5ea6\u5e94\u4e3a8-20\u4f4d\uff01&quot;\nfi<\/code><\/pre>\n<h3>case\u5224\u65ad\u8bed\u53e5<\/h3>\n<h4>\u4ec0\u4e48\u662fcase<\/h4>\n<ul>\n<li><code>case<\/code>\u8bed\u53e5\u548c<code>if<\/code>\u591a\u5206\u652f\u5224\u65ad\u8bed\u53e5\u7c7b\u4f3c\uff0c\u4e3b\u8981\u7528\u6765\u505a\u591a\u6761\u4ef6\u5224\u65ad<\/li>\n<li>\u53ea\u4e0d\u8fc7<code>case<\/code>\u5728<code>shell<\/code>\u811a\u672c\u4e2d\u6bd4<code>if<\/code>\u591a\u5206\u652f\u6761\u4ef6\u5224\u65ad\u66f4\u65b9\u4fbf<\/li>\n<\/ul>\n<h4>case\u4f7f\u7528\u573a\u666f<\/h4>\n<ul>\n<li>\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u6211\u4eec\u4f1a\u6839\u636e<em>\u4e00\u4e2a\u95ee\u9898<\/em>\u505a\u591a\u79cd\u9884\u6848\uff0c\u7136\u540e\u6839\u636e\u7528\u6237\u9009\u62e9\u6765\u52a0\u8f7d\u4e0d\u540c\u7684\u9884\u6848<\/li>\n<li>\u6bd4\u5982\u670d\u52a1\u7684\u542f\u505c\u811a\u672c\uff0c\u6211\u4eec\u9996\u5148\u8981\u5199\u597d\u542f\u52a8\u3001\u505c\u6b62\u3001\u91cd\u542f\u7684\u9884\u6848\uff0c\u7136\u540e\u6839\u636e\u7528\u6237\u9009\u62e9\u6765\u52a0\u8f7d\u4e0d\u540c\u7684\u9884\u6848<\/li>\n<\/ul>\n<h4>case\u57fa\u7840\u8bed\u6cd5<\/h4>\n<ul>\n<li><code>case<\/code>\u57fa\u7840\u8bed\u6cd5<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">case $1 in start\n\u6761\u4ef6 1)\n    \u6267\u884c\u4ee3\u7801\u57571\n    ;;\n\u6761\u4ef6 2)\n    \u6267\u884c\u4ee3\u7801\u57572\n    ;;\n\u6761\u4ef6 3)\n    \u6267\u884c\u4ee3\u7801\u57573\n    ;;\n*\uff09\n    \u65e0\u5339\u914d\u540e\u547d\u4ee4\nesac<\/code><\/pre>\n<ul>\n<li><code>case<\/code>\u793a\u4f8b\uff1a<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat case.sh\n#!\/usr\/bin\/bash\n\ncat &lt;&lt; EOF\n*****************\n\n** 1. backup **\n** 2. copy   **\n** 3. quit   **\n\n*****************\nEOF\n\nread -p &quot;Input a choose:&quot; OP\n\ncase $OP in\n        1|backup)\n        echo &quot;BACKUP...&quot;\n        ;;\n        2|copy)\n        echo &quot;COPY...&quot;\n        ;;\n        3|quit)\n        exit\n        ;;\n        *)\n        echo error!\nesac<\/code><\/pre>\n<h5>\u573a\u666f1-\u7f16\u5199rsync\u542f\u505c\u811a\u672c<\/h5>\n<p>\u5148\u5728\u914d\u7f6e\u6587\u4ef6\u914d\u7f6e\u8bb0\u5f55<code>pid<\/code><\/p>\n<pre><code class=\"language-bash\">cat \/etc\/rsyncd.conf\npid file = \/var\/run\/rsyncd.pid<\/code><\/pre>\n<pre><code class=\"language-bash\">cat rsync.sh\n#!\/usr\/bin\/bash\n. \/etc\/init.d\/functions\n\nRsync_Pid_File=\/var\/run\/rsyncd.pid\n\nstart_rsync(){\n        # \u5224\u65adpid\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u5b58\u5728\u8bf4\u660e\u670d\u52a1\u5df2\u7ecf\u542f\u52a8\u8fc7\u4e86\n        if [ -f $Rsync_Pid_File ];then\n                action &quot;Rsync\u6b63\u5728\u8fd0\u884c\u4e2d\uff0c\u4e0d\u7528\u91cd\u590d\u542f\u52a8...&quot; \/bin\/false\n        else\n                \/usr\/bin\/rsync --daemon\n                Rsync_Status=$(netstat -lntp | grep 873 | grep -w &quot;tcp&quot; | wc -l)\n\n                if [ $Rsync_Status -eq 1 ];then\n                        action &quot;Rsync \u542f\u52a8\u6210\u529f&quot; \/bin\/true\n                else\n                        action &quot;Rsync \u542f\u52a8\u5931\u8d25&quot; \/bin\/false\n                fi\n        fi\n}\n\nstop_rsync(){\n        # \u5224\u65ad\u662f\u5426\u5b58\u6d3b\n        if [ -f $Rsync_Pid_File ];then\n                # \u505c\u6b62\n                kill $(cat ${Rsync_Pid_File})\n                sleep 0.5\n                Rsync_Status=$(netstat -lntp | grep 873 | grep -w &quot;tcp&quot; | wc -l)\n\n                if [ $Rsync_Status -eq 0 ];then\n                        action &quot;Rsync \u505c\u6b62\u6210\u529f&quot; \/bin\/true\n                else\n                        action &quot;Rsync \u505c\u6b62\u5931\u8d25&quot; \/bin\/false\n                fi\n        else\n                # \u5df2\u7ecf\u662f\u505c\u6b62\u72b6\u6001\n                action &quot;Rsync \u5df2\u7ecf\u662f\u505c\u6b62\u72b6\u6001&quot; \/bin\/false\n        fi\n}\n\ncase $1 in\n        start)\n                start_rsync\n        ;;\n\n        stop)\n                stop_rsync\n        ;;\n\n        restart)\n                if [ -f $Rsync_Pid_File ];then\n                        stop_rsync\n                        start_rsync\n                else\n                        start_rsync\n                fi\n        ;;\n\n        status)\n                if [ -f $Rsync_Pid_File ];then\n                        rsync_pid=$(cat ${Rsync_Pid_File})\n                        echo &quot;&quot;\n                        echo &quot;***********************Rsync Status********************&quot;\n                        rsync_process_message=$(ps aux|grep ${rsync_pid} | grep -v grep)\n                        echo &quot;${rsync_process_message}&quot;\n                        echo &quot;*******************************************************&quot;\n                else\n                        action &quot;Rsync \u6682\u672a\u542f\u52a8...&quot; \/bin\/false\n                fi\n        ;;\n\n        *)\n                echo &quot;Usage $0 [ start | status | restart | stop ]&quot;\n                exit\nesac<\/code><\/pre>\n<h5>\u573a\u666f2-\u7f16\u5199nginx\u542f\u505c\u811a\u672c<\/h5>\n<pre><code class=\"language-bash\">cat nginx.sh\n#!\/usr\/bin\/bash\n. \/etc\/init.d\/functions\n\nngx_pid=\/var\/run\/nginx.pid\nngx_tmp=\/tmp\/ngx.status\ncase $1 in\n        start)\n                # \u5224\u65ad\u670d\u52a1\u662f\u5426\u5b58\u6d3b\n                if [ ! -f $ngx_pid ];then\n                        nginx -t &amp;&gt; \/${ngx_tmp}\n                        if [ $? -ne 0 ];then\n                                ngx_file=$(cat \/tmp\/ngx.status | awk &#039;\/emerg\/&#039; | awk &#039;{print $NF}&#039; | awk -F &quot;:&quot; &#039;{print $1}&#039;)\n                                ngx_line=$(cat \/tmp\/ngx.status | awk &#039;\/emerg\/&#039; | awk &#039;{print $NF}&#039; | awk -F &quot;:&quot; &#039;{print $2}&#039;)\n\n                                read -p &quot;Nginx\u7684 ${ngx_file} \u7684\u7b2c ${ngx_line} \u884c\u51fa\u73b0\u4e86\u9519\u8bef\uff0c\u662f\u5426\u9700\u8981\u8fdb\u5165\u7f16\u8f91 [ y | n ]:&quot; Action\n\n                                if [ ${Action:=y} == &quot;y&quot; ];then\n                                        vim ${ngx_file} +${ngx_line}\n                                else\n                                        exit\n                                fi\n                        else\n                                # \u542f\u52a8\n                                \/usr\/sbin\/nginx\n                                # \u67e5\u770b\u8fdb\u7a0b\n                                ngx_process_id=$(cat ${ngx_pid})\n                                ngx_process_message=$(ps aux | grep ${ngx_process_id} | grep -v grep | wc -l)\n                                if [ $ngx_process_message -ge 1 ];then\n                                        action &quot;Nginx\u542f\u52a8\u6210\u529f&quot; \/bin\/true\n                                else\n                                        action &quot;Nginx\u542f\u52a8\u5931\u8d25&quot; \/bin\/false\n                                fi\n                        fi\n                else\n                        action &quot;Nginx\u5df2\u7ecf\u542f\u52a8\u4e86\uff0c\u4e0d\u8981\u91cd\u590d\u542f\u52a8\uff01&quot; \/bin\/false\n                fi\n        ;;\n\n        stop)\n        ;;\n        status)\n        ;;\n        *)\n                echo &quot;Usage $0 [ start | stop | status ]&quot;\n                exit\nesac<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>if\u5224\u65ad\u8bed\u53e5 \u4ec0\u4e48\u662fif if\u5c31\u662f\u6a21\u4eff\u4eba\u7c7b\u7684\u5224\u65ad\u6765\u8fdb\u884c\u7684\uff0c\u4f46\u5b83\u6ca1\u6709\u4eba\u7c7b\u90a3\u4e48\u6709\u60c5\u611f\uff0c\u53ea\u6709True\u548cFalse\u8fd9\u4e24&#8230; &raquo; <a class=\"read-more-link\" href=\"http:\/\/blue.yn.cn\/?p=719\">\u9605\u8bfb\u5168\u6587<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-719","post","type-post","status-publish","format-standard","hentry","category-shell"],"_links":{"self":[{"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts\/719","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=719"}],"version-history":[{"count":21,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts\/719\/revisions"}],"predecessor-version":[{"id":1597,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts\/719\/revisions\/1597"}],"wp:attachment":[{"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=719"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}