{"id":698,"date":"2024-05-02T11:07:33","date_gmt":"2024-05-02T03:07:33","guid":{"rendered":"http:\/\/blue.yn.cn\/?p=698"},"modified":"2024-10-07T20:40:13","modified_gmt":"2024-10-07T12:40:13","slug":"shell%e8%84%9a%e6%9c%ac%e5%9f%ba%e7%a1%80%e4%b8%8e%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"http:\/\/blue.yn.cn\/?p=698","title":{"rendered":"\u811a\u672c\u57fa\u7840\u4e0e\u53d8\u91cf"},"content":{"rendered":"<h3>Shell\u811a\u672c\u6982\u8ff0<\/h3>\n<h4>\u4ec0\u4e48\u662fshell<\/h4>\n<ul>\n<li><code>shell<\/code>\u662f\u4e00\u4e2a\u547d\u4ee4\u89e3\u91ca\u5668\uff0c\u5b83\u5728\u64cd\u4f5c\u7cfb\u7edf\u7684\u6700\u5916\u5c42\uff0c\u8d1f\u8d23\u76f4\u63a5\u4e0e\u7528\u6237\u8fdb\u884c\u5bf9\u8bdd\uff0c\u5c06\u7528\u6237\u8f93\u5165\u7684\u547d\u4ee4\u7ffb\u8bd1\u7ed9\u64cd\u4f5c\u7cfb\u7edf\uff0c\u5e76\u5c06\u5904\u7406\u7684\u7ed3\u679c\u8f93\u51fa\u81f3\u5c4f\u5e55<\/li>\n<li>\u5f53\u7136<code>shell<\/code>\u547d\u4ee4\u662f\u5b58\u5728\u4ea4\u4e92\u5f0f\u3001\u975e\u4ea4\u4e92\u5f0f\u4e24\u79cd\u65b9\u5f0f\n<ul>\n<li>\u4ea4\u4e92\uff1a\u65e5\u5e38\u4f7f\u7528\u3001\u767b\u5f55\u3001\u6267\u884c\u547d\u4ee4\u3001\u9000\u51fa\uff1b<\/li>\n<li>\u975e\u4ea4\u4e92\uff1a\u76f4\u63a5\u8bfb\u53d6\u67d0\u4e2a\u6587\u4ef6\uff0c\u6587\u4ef6\u4ece\u5934\u6267\u884c\u5230\u5c3e\u5373\u7ed3\u675f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>\u4ec0\u4e48\u662fshell\u811a\u672c<\/h4>\n<ul>\n<li>1.\u5c06\u7cfb\u7edf\u547d\u4ee4\u5806\u79ef\u5728\u4e00\u8d77\uff0c\u987a\u5e8f\u6267\u884c\uff08\u7b80\u79f0\uff1a\u7cfb\u7edf\u547d\u4ee4\u5806\u79ef\uff09<\/li>\n<li>2.\u7279\u5b9a\u7684\u683c\u5f0f+\u7279\u5b9a\u7684\u8bed\u6cd5+\u7cfb\u7edf\u7684\u547d\u4ee4=\u6587\u4ef6\uff08Shell\u811a\u672c\u6587\u4ef6\uff09\n<ul>\n<li>\u5f00\u5934\uff1a<code>#!\/usr\/bin\/bash<\/code><\/li>\n<li>\u8bed\u6cd5\uff1a<code>if for ...<\/code><\/li>\n<li><code>awk,grep,sed...<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Shell\u811a\u672c\u80fd\u505a\u4ec0\u4e48<\/h4>\n<ul>\n<li>1.\u57fa\u7840\u914d\u7f6e\uff1a\u7cfb\u7edf\u521d\u59cb\u5316\u64cd\u4f5c\u3001\u7cfb\u7edf\u66f4\u65b0\u3001\u5185\u6838\u8c03\u6574\u3001\u7f51\u7edc\u3001\u65f6\u533a\u3001SSH\u4f18\u5316<\/li>\n<li>2.\u5b89\u88c5\u7a0b\u5e8f\uff1a\u90e8\u7f72<code>lnmp\u3001lnmt\u3001mysql\u3001nginx\u3001redis\u3001lvs\u3001keepalived<\/code>\u7b49\u5f85<\/li>\n<li>3.\u914d\u7f6e\u53d8\u66f4\uff1a<code>nginx conf\u3001php conf\u3001mysql conf\u3001redis conf<\/code><\/li>\n<li>4.\u4e1a\u52a1\u90e8\u7f72\uff1a<code>shell<\/code>\u914d\u5408<code>git\u3001jenkins<\/code>\u5b9e\u73b0\u4ee3\u7801\u81ea\u52a8\u90e8\u7f72\uff0c\u4ee5\u53ca\u4ee3\u7801\u56de\u6eda<\/li>\n<li>5.\u65e5\u5e38\u5907\u4efd\uff1a\u4f7f\u7528<code>shell<\/code>\u811a\u672c\u5bf9<code>mysql<\/code>\u8fdb\u884c\u6bcf\u665a\u7684\u5168\u5907\u4e0e\u589e\u91cf\u5907\u4efd<\/li>\n<li>6.\u4fe1\u606f\u91c7\u96c6\uff1a<code>zabbix + shell<\/code>\uff0c\u786c\u4ef6\u3001\u7cfb\u7edf\u3001\u670d\u52a1\u3001\u7f51\u7edc\u7b49\u5f85<\/li>\n<li>7.\u65e5\u5fd7\u5206\u6790\uff1a\u53d6\u503c--&gt;\u6392\u5e8f--&gt;\u53bb\u91cd--&gt;\u7edf\u8ba1--&gt;\u5206\u6790<\/li>\n<li>8.\u670d\u52a1\u6269\u5bb9\uff1a\u6269\u5bb9\u76d1\u63a7\u670d\u52a1\u96c6\u7fa4<code>cpu<\/code>\uff0c\u5982<code>cpu<\/code>\u8d1f\u8f7d\u6301\u7eed80% + \u89e6\u53d1\u52a8\u4f5c\uff08\u811a\u672c\uff09\uff0c\u811a\u672c\uff1a\u8c03\u7528<code>api<\/code>\u5f00\u901a\u4e91\u4e3b\u673a--&gt;\u521d\u59cb\u5316\u73af\u5883--&gt;\u52a0\u5165\u96c6\u7fa4--&gt;\u5bf9\u5916\u63d0\u4f9b<\/li>\n<li>9.\u670d\u52a1\u7f29\u5bb9\uff1a\u76d1\u63a7\u670d\u52a1\u96c6\u7fa4<code>cpu<\/code>\u4f7f\u7528\u7387\uff0c\u4f4e\u4e8e20%--&gt;\u68c0\u6d4b\u5f53\u524d\u6709\u591a\u5c11<code>web<\/code>\u8282\u70b9--&gt;\u5224\u65ad\u662f\u5426\u8d85\u8fc7\u9884\u8bbe--&gt;\u7f29\u51cf\u5230\u5bf9\u5e94\u7684\u9884\u8bbe\u72b6\u6001--&gt;\u53d8\u66f4\u8d1f\u8f7d\u7684\u914d\u7f6e<\/li>\n<li>10.\u5b57\u7b26\u63d0\u53d6\uff1a\u6bd4\u5982<code>nginx<\/code>\u72b6\u6001\u3001<code>php<\/code>\u72b6\u6001\u3001\u683c\u5f0f\u5316\u6570\u636e\u7b49<\/li>\n<li>\u6ce8\u610f\uff1a<code>shell<\/code>\u811a\u672c\u4e3b\u8981\u7684\u4f5c\u7528\u662f\u7b80\u5316\u64cd\u4f5c\u6b65\u9aa4\uff0c\u63d0\u9ad8\u6548\u7387\uff0c\u51cf\u5c11\u4eba\u4e3a\u5e72\u9884\uff0c\u51cf\u5c11\u7cfb\u7edf\u6545\u969c<\/li>\n<\/ul>\n<h4>Shell\u811a\u672c\u9884\u5907\u77e5\u8bc6<\/h4>\n<h5>\u5b66\u4e60shell\u811a\u672c\u9884\u5907\u77e5\u8bc6<\/h5>\n<ul>\n<li>1.\u719f\u7ec3\u4f7f\u7528<code>vim<\/code>\u7f16\u8f91\u5668<\/li>\n<li>2.\u719f\u7ec3\u4f7f\u7528<code>linux<\/code>\u57fa\u7840\u547d\u4ee4\uff08<code>awk,grep,wc,netstat,ps,lsof,find...<\/code>)<\/li>\n<li>3.\u6570\u91cf\u4f7f\u7528<code>linux<\/code>\u4e09\u5251\u5ba2<\/li>\n<li>\u6ce8\u610f\uff1a\u5982\u679c\u6211\u4eec\u5bf9\u547d\u4ee4\u4f7f\u7528\u4e0d\u591f\u719f\u7ec3\uff0c\u5bf9\u57fa\u672c\u670d\u52a1\u4e5f\u4e0d\u4f1a\u624b\u52a8\u642d\u5efa\uff0c\u90a3\u4e48\u4e00\u5b9a\u5b66\u4e0d\u4f1a<code>shell<\/code><\/li>\n<\/ul>\n<h5>\u5982\u4f55\u624d\u80fd\u5b66\u597dshell\u811a\u672c<\/h5>\n<ul>\n<li>1.\u57fa\u7840\u547d\u4ee4+\u57fa\u7840\u670d\u52a1+\u7ec3\u4e60+\u601d\u8def\uff08\u5fc5\u5907\uff09<\/li>\n<li>2.\u80fd\u770b\u61c2<code>shell<\/code>\u811a\u672c--&gt;\u80fd\u4fee\u6539<code>shell<\/code>\u811a\u672c--&gt;\u80fd\u7f16\u5199<code>shell<\/code>\u811a\u672c--&gt;\u80fd\u4f18\u5316<code>shell<\/code>\u811a\u672c<\/li>\n<\/ul>\n<h4>Shell\u811a\u672c\u4e66\u5199\u65b9\u5f0f<\/h4>\n<h5>Shell\u811a\u672c\u547d\u540d\u89c4\u8303<\/h5>\n<ul>\n<li>\u540d\u5b57\u8981\u6709\u610f\u4e49\uff0c\u4e0d\u8981\u4f7f\u7528<code>a\u3001b\u3001c\u30011\u30012\u30013<\/code>\u8fd9\u79cd\u65b9\u5f0f\u547d\u540d<\/li>\n<li>\u867d\u7136<code>linux<\/code>\u7cfb\u7edf\u4e2d\uff0c\u6587\u4ef6\u6ca1\u6709\u6269\u5c55\u540d\u7684\u6982\u5ff5\n<ul>\n<li>\u4f9d\u7136\u5efa\u8bae\u4f7f\u7528<code>.sh<\/code>\u7ed3\u5c3e<\/li>\n<li>\u540d\u79f0\u63a7\u5236\u572830\u4e2a\u5b57\u8282\u4ee5\u5185\u3002\u4f8b\u5982\uff1a<code>check_memory.sh<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h5>Shell\u811a\u672c\u683c\u5f0f\u7533\u660e<\/h5>\n<ul>\n<li><code>shell<\/code>\u811a\u672c\u5f00\u5934\u5fc5\u987b\u6307\u5b9a\u811a\u672c\u8fd0\u884c\u73af\u5883\u4ee5<code>#<\/code>\u8fd9\u4e2a\u7279\u6b8a\u7b26\u53f7\u7ec4\u5408\u6765\u7ec4\u6210<\/li>\n<li>\u5982\uff1a<code>#!\/bin\/bash<\/code>\u6307\u5b9a\u8be5\u811a\u672c\u662f\u8fd0\u884c\u89e3\u6790\u7531<code>\/bin\/bash<\/code>\u6765\u5b8c\u6210<\/li>\n<\/ul>\n<h5>Shell\u811a\u672c#\u53f7\u7684\u4f7f\u7528<\/h5>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n#Author:xxx\n#Created Time:2024\/5\/2 13:00\n#Script Description: first shell study script<\/code><\/pre>\n<h5>\u81ea\u52a8\u6dfb\u52a0Shell\u7684\u9996\u90e8<\/h5>\n<pre><code class=\"language-bash\">cat ~\/.vimrc\nautocmd BufNewFile *.sh exec &quot;:call SetTitle()&quot;\nfunc SetTitle()\nif expand(&quot;%:e&quot;) == &#039;sh&#039;\ncall setline(1,&quot;#!\/usr\/bin\/bash&quot;)\ncall setline(2,&quot;#****************************************&quot;)\ncall setline(3,&quot;#Author       : yujing&quot;)\ncall setline(4,&quot;#Date         : &quot;.strftime(&quot;%y-%m-%d&quot;))\ncall setline(5,&quot;#FileName     : &quot;.expand(&quot;%&quot;))\ncall setline(6,&quot;#Description  : The test script&quot;)\ncall setline(7,&quot;#****************************************&quot;)\ncall setline(8,&quot;&quot;)\nendif\nendfunc\nautocmd BufNewFile * normal G<\/code><\/pre>\n<h3>Shell\u53d8\u91cf<\/h3>\n<h4>\u4ec0\u4e48\u662f\u53d8\u91cf<\/h4>\n<ul>\n<li>\u53d8\u91cf\u662f<code>shell<\/code>\u4e2d\u4f20\u9012\u6570\u636e\u7684\u4e00\u79cd\u65b9\u6cd5<\/li>\n<li>\u7b80\u5355\u7406\u89e3\uff1a\u5c31\u662f\u7528\u4e00\u4e2a\u56fa\u5b9a\u7684\u5b57\u7b26\u4e32\u53bb\u8868\u793a\u4e0d\u56fa\u5b9a\u7684\u503c\uff0c\u4fbf\u4e8e\u540e\u7eed\u5f15\u7528<\/li>\n<\/ul>\n<h4>\u53d8\u91cf\u547d\u540d\u89c4\u8303<\/h4>\n<ul>\n<li>\u53d8\u91cf\u5b9a\u4e49\u547d\u540d\uff1a\u5927\u5199\u5c0f\u5199\u5b57\u6bcd\u3001\u4e0b\u5212\u7ebf\u3001\u6570\u5b57\u7ec4\u6210\uff0c\u5c3d\u91cf\u5b57\u6bcd\u5f00\u5934\u3002\uff08\u53d8\u91cf\u540d\u79f0\u6700\u597d\u5177\u5907\u4e00\u5b9a\u542b\u4e49\uff09<\/li>\n<li>\u53d8\u91cf\u5b9a\u4e49\u8bed\u6cd5\uff1a\u53d8\u91cf\u540d=\u53d8\u91cf\u503c\uff0c\u7b49\u53f7\u662f\u8d4b\u503c\uff0c\u9700\u8981\u6ce8\u610f\uff1a\u7b49\u53f7\u4e24\u8fb9\u4e0d\u80fd\u6709\u7a7a\u683c\uff0c\u5176\u6b21\u5b9a\u4e49\u7684\u53d8\u91cf\u4e0d\u8981\u4e0e\u7cfb\u7edf\u547d\u4ee4\u51fa\u73b0\u51b2\u7a81\u3002\u53c2\u8003\u5982\u4e0b\u5b9a\u4e49\u53d8\u91cf\u65b9\u5f0f\uff1a\n<ul>\n<li><code>ip=10.0.0.100<\/code><\/li>\n<li><code>ip1=10.0.0.100<\/code><\/li>\n<li><code>Hostname_Ip=10.0.0.100<\/code><\/li>\n<li><code>hostname_ip=10.0.0.100<\/code><\/li>\n<li><code>system_cpu_load_avg1\u3001system_cpu_load_avg5\u3001system_cpu_load_avg15<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>\u53d8\u91cf\u5b9a\u4e49\u65b9\u5f0f<\/h4>\n<ul>\n<li>1.\u7528\u6237\u81ea\u5b9a\u4e49\u53d8\u91cf\uff1a\u4eba\u4e3a\u5b9a\u4e49\u53d8\u91cf\u540d\u4e0e\u53d8\u91cf\u7684\u503c<\/li>\n<li>2.\u7cfb\u7edf\u73af\u5883\u53d8\u91cf\uff1a\u4fdd\u5b58\u7684\u662f\u548c\u7cfb\u7edf\u64cd\u4f5c\u73af\u5883\u76f8\u5173\u7684\u6570\u636e\uff0c\u6240\u6709\u7528\u6237\u90fd\u53ef\u4ee5\u4f7f\u7528<\/li>\n<li>3.\u4f4d\u7f6e\u53c2\u6570\u53d8\u91cf\uff1a\u5411\u811a\u672c\u4e2d\u8fdb\u884c\u53c2\u6570\u4f20\u9012\uff0c\u53d8\u91cf\u540d\u4e0d\u80fd\u81ea\u5b9a\u4e49\uff0c\u53d8\u91cf\u4f5c\u7528\u662f\u56fa\u5b9a\u7684<\/li>\n<li>4.\u7279\u6b8a\u53c2\u6570\u53d8\u91cf\uff1a\u662f<code>bash<\/code>\u4e2d\u5df2\u7ecf\u5b9a\u4e49\u597d\u7684\u53d8\u91cf\uff0c\u53d8\u91cf\u540d\u4e0d\u80fd\u81ea\u5b9a\u4e49\uff0c\u53d8\u91cf\u4f5c\u7528\u4e5f\u662f\u56fa\u5b9a\u7684<\/li>\n<\/ul>\n<h5>\u7528\u6237\u81ea\u5b9a\u4e49\u53d8\u91cf<\/h5>\n<p>1.\u5b9a\u4e49\u53d8\u91cf\uff0c\u53d8\u91cf\u540d=\u53d8\u91cf\u503c<br \/>\n<code>var=\u201chello shell&quot;<\/code>  # \u5b9a\u4e49\u53d8\u91cf\u6709\u7a7a\u683c\u5fc5\u987b\u4f7f\u7528\u53cc\u5f15\u53f7<\/p>\n<p>2.\u5f15\u7528\u53d8\u91cf\uff0c<code>$\u53d8\u91cf\u540d<\/code>\u6216<code>${\u53d8\u91cf\u540d}<\/code><\/p>\n<pre><code class=\"language-bash\">var=&quot;hello world&quot;\necho $var\nhello world\necho $var_log\n\necho ${var}_log\nhello world_log<\/code><\/pre>\n<p>3.\u6ce8\u610f\u4e8b\u9879\uff0c\u5e94\u7528\u53d8\u91cf\u65f6\u6ce8\u610f\u4e8b\u9879\uff0c<code>&quot;&quot;<\/code>\u53cc\u5f15\u53f7\u5c5e\u4e8e\u5f31\u5f15\u7528\uff0c<code>&#039;&#039;<\/code>\u5355\u5f15\u53f7\u5c5e\u4e8e\u5f3a\u5f15\u7528<\/p>\n<pre><code class=\"language-bash\"># var=iphone\necho &quot;$var is good&quot;\niphone is good\necho &#039;$var is good&#039;\n$var is good\n# \u5982\u679c\u6709\u53d8\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u5efa\u8bae\u589e\u52a0\u53cc\u5f15\u53f7\n# \u5982\u679c\u5b58\u5728\u7279\u6b8a\u7684\u5b57\u7b26\uff0c\u4e0d\u5e0c\u671b\u88ab\u89e3\u6790\uff0c\u8fd9\u4e2a\u65f6\u5019\u9700\u8981\u4f7f\u7528&#039;&#039;\u6216\u8005\u8f6c\u4e49\u5b57\u7b26\\\necho \\$var is good<\/code><\/pre>\n<h5>\u7cfb\u7edf\u73af\u5883\u53d8\u91cf<\/h5>\n<p>1.\u4f7f\u7528\u7cfb\u7edf\u5df2\u5b9a\u4e49\u597d\u7684\u73af\u5883\u53d8\u91cf<\/p>\n<pre><code class=\"language-bash\">cat env.sh\n#!\/usr\/bin\/bash\necho &quot;\u7528\u6237\u7684\u5bb6\u76ee\u5f55\uff1a$HOME&quot;\necho &quot;\u5f53\u524d\u4e3b\u673a\u540d\u662f\uff1a$HOSTNAME&quot;\necho &quot;\u5f53\u524d\u6240\u5728\u76ee\u5f55\uff1a$PWD&quot;\n\nbash env.sh\n\u7528\u6237\u7684\u5bb6\u76ee\u5f55\uff1a\/root\n\u5f53\u524d\u4e3b\u673a\u540d\u662f\uff1awordpress\n\u5f53\u524d\u6240\u5728\u76ee\u5f55\uff1a\/root<\/code><\/pre>\n<p>2.\u4eba\u4e3a\u5b9a\u4e49\u73af\u5883\u53d8\u91cf\uff1a<code>export<\/code>\u53d8\u91cf\uff0c\u5c06\u81ea\u5b9a\u4e49\u53d8\u91cf\u8f6c\u6362\u6210\u73af\u5883\u53d8\u91cf<\/p>\n<pre><code class=\"language-bash\">var=hello\necho $var\nhello\ncat hello.sh\n#!\/usr\/bin\/bash\necho $var\nsh hello.sh  # \u6267\u884chello.sh\u65f6\uff0c\u4f1a\u4f7f\u7528\u53e6\u4e00\u4e2abash\u53bb\u6267\u884c\uff0c\u5c31\u8bbf\u95ee\u4e0d\u5230$var\u7684\u503c\n\nexport var=hello  # \u5c06\u53d8\u91cf\u8f6c\u6362\u4e3a\u73af\u5883\u53d8\u91cf\nsh hello.sh  # \u518d\u6b21\u6267\u884c\u811a\u672c\nhello\n# \u6ce8\u610f\uff1a\u4e5f\u662f\u4e34\u65f6\u7684\uff0c\u9000\u51fa\u8be5shell\u540e\u4e0d\u751f\u6548<\/code><\/pre>\n<h5>\u4f4d\u7f6e\u53c2\u6570\u53d8\u91cf<\/h5>\n<p>\u4f4d\u7f6e\u53c2\u6570\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u4f20\u9012\u7ed9\u811a\u672c\u53c2\u6570\u7684\u4f4d\u7f6e\uff0c\u4f8b\u5982\u7ed9\u4e00\u4e2a\u811a\u672c\u4f20\u9012\u4e00\u4e2a\u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5728<code>shell<\/code>\u811a\u672c\u5185\u90e8\u83b7\u53d6\u4f20\u5165\u7684\u4f4d\u7f6e\u53c2\u6570\uff0c\u83b7\u53d6\u53c2\u6570\u7684\u683c\u5f0f\u4e3a\uff1a<code>$n<\/code>\u3002<code>n<\/code>\u4ee3\u8868\u4e00\u4e2a\u6570\u5b57<br \/>\n\u4f8b\u5982\u4f20\u9012\u7ed9\u811a\u672c\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a<code>$1<\/code>\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u5c31\u4e3a<code>$2<\/code>\uff0c\u4ee5\u6b64\u7c7b\u63a8...\uff0c\u5176\u4e2d<code>$0<\/code>\u4e3a\u8be5\u811a\u672c\u7684\u540d\u79f0<br \/>\n1.\u7f16\u5199\u811a\u672c<\/p>\n<pre><code class=\"language-bash\">cat args.sh\necho &quot;#\u5f53\u524dshell\u811a\u672c\u7684\u6587\u4ef6\u540d\uff1a$0&quot;\necho &quot;#\u7b2c\u4e00\u4e2ashell\u811a\u672c\u4f4d\u7f6e\u53c2\u6570\uff1a$1&quot;\necho &quot;#\u7b2c\u4e8c\u4e2ashell\u811a\u672c\u4f4d\u7f6e\u53c2\u6570\uff1a$2&quot;\necho &quot;#\u7b2c\u4e09\u4e2ashell\u811a\u672c\u4f4d\u7f6e\u53c2\u6570\uff1a$3&quot;<\/code><\/pre>\n<p>2.\u6267\u884c\u811a\u672c\uff08\u53d1\u73b0\u7b2c\u4e00\u4e2a\u53c2\u657011\u3001\u7b2c\u4e00\u4e2a\u53c2\u657022\u3001\u7b2c\u4e09\u4e2a\u53c2\u657033\u3001\u811a\u672c\u540d\u79f0<code>args.sh<\/code>\uff09<\/p>\n<pre><code class=\"language-bash\">sh args.sh 11 22 33\n#\u5f53\u524dshell\u811a\u672c\u7684\u6587\u4ef6\u540d\uff1aargs.sh\n#\u7b2c\u4e00\u4e2ashell\u811a\u672c\u4f4d\u7f6e\u53c2\u6570\uff1a11\n#\u7b2c\u4e8c\u4e2ashell\u811a\u672c\u4f4d\u7f6e\u53c2\u6570\uff1a22\n#\u7b2c\u4e09\u4e2ashell\u811a\u672c\u4f4d\u7f6e\u53c2\u6570\uff1a33<\/code><\/pre>\n<h5>\u7279\u6b8a\u53c2\u6570\u53d8\u91cf<\/h5>\n<ul>\n<li>\u7279\u6b8a\u53c2\u6570\uff1a\n<ul>\n<li><code>$#<\/code>\uff1a\u4f20\u9012\u7ed9\u811a\u672c\u6216\u51fd\u6570\u7684\u53c2\u6570\u4e2a\u6570\u603b\u548c<\/li>\n<li><code>$*<\/code>\uff1a\u4f20\u9012\u7ed9\u811a\u672c\u6216\u51fd\u6570\u7684\u6240\u6709\u53c2\u6570\uff0c\u5f53\u88ab\u53cc\u5f15\u53f7<code>&quot;&quot;<\/code>\u5305\u542b\u65f6\uff0c\u6240\u6709\u7684\u4f4d\u7f6e\u53c2\u6570\u88ab\u770b\u4f5c\u4e00\u4e2a\u5b57\u7b26\u4e32<\/li>\n<li><code>$@<\/code>\uff1a\u4f20\u9012\u7ed9\u811a\u672c\u6216\u51fd\u6570\u7684\u6240\u6709\u53c2\u6570\uff0c\u5f53\u88ab\u53cc\u5f15\u53f7<code>&quot;&quot;<\/code>\u5305\u542b\u65f6\uff0c\u6bcf\u4e2a\u4f4d\u7f6e\u53c2\u6570\u88ab\u770b\u4f5c\u72ec\u7acb\u7684\u5b57\u7b26\u4e32<\/li>\n<li><code>$?<\/code>\uff1a\u4e0a\u4e2a\u547d\u4ee4\u7684\u9000\u51fa\u72b6\u6001\uff0c\u6216\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff0c0\u4e3a\u6267\u884c\u6210\u529f\uff0c\u975e0\u5219\u4e3a\u6267\u884c\u5931\u8d25<\/li>\n<li><code>$$<\/code>\uff1a\u5f53\u524d\u7a0b\u5e8f\u8fd0\u884c\u7684<code>PID<\/code><\/li>\n<li><code>$0<\/code>\uff1a\u811a\u672c\u7684\u4f4d\u7f6e+\u540d\u79f0=\u8def\u5f84<\/li>\n<li><code>$1..$n<\/code>\uff1a\u811a\u672c\u7684\u4f4d\u7f6e\u53c2\u6570\uff0c\u53c2\u6570\u4e4b\u95f4\u4f7f\u7528\u7a7a\u683c\u9694\u5f00<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>1.\u7f16\u5199\u811a\u672c<\/p>\n<pre><code class=\"language-bash\">cat args.sh\n#!\/usr\/bin\/bash\necho &quot;\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\uff1a$1&quot;\necho &quot;\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a\uff1a$2&quot;\necho &quot;\u811a\u672c\u540d\u79f0\u4e3a\uff1a$0&quot;\necho &quot;\u811a\u672c\u63a5\u6536\u53c2\u6570\u603b\u6570\u4e3a\uff1a$#&quot;\n\ncurl -I baidu.com &amp;&gt; \/dev\/null\necho &quot;\u8fd0\u884c\u547d\u4ee4\u7684\u72b6\u6001\u4e3a\uff1a$?&quot;\n\necho &quot;\u811a\u672c\u7684PID\u4e3a\uff1a$$&quot;\necho &quot;\\$* \u7684\u7ed3\u679c\u4e3a\uff1a$*&quot;\necho &quot;\\$@ \u7684\u7ed3\u679c\u4e3a\uff1a$@&quot;\necho &quot;=========================&quot;\n\necho &quot;\\$* \u5faa\u73af\u63a5\u6536\u7684\u7ed3\u679c&quot;\nfor i in &quot;$*&quot;\ndo\n    echo $i\ndone\n\necho &quot;\\$@ \u5faa\u73af\u63a5\u6536\u7684\u7ed3\u679c&quot;\nfor j in &quot;$@&quot;\ndo\n    echo $j\ndone<\/code><\/pre>\n<p>2.\u6267\u884c\u811a\u672c<\/p>\n<pre><code class=\"language-bash\">sh args.sh jenkins docker kubernetes\n\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\uff1ajenkins\n\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a\uff1adocker\n\u811a\u672c\u540d\u79f0\u4e3a\uff1aargs.sh\n\u811a\u672c\u63a5\u6536\u53c2\u6570\u603b\u6570\u4e3a\uff1a3\n\u8fd0\u884c\u547d\u4ee4\u7684\u72b6\u6001\u4e3a\uff1a0\n\u811a\u672c\u7684PID\u4e3a\uff1a98537\n$* \u7684\u7ed3\u679c\u4e3a\uff1ajenkins docker kubernetes\n$@ \u7684\u7ed3\u679c\u4e3a\uff1ajenkins docker kubernetes\n=========================\n$* \u5faa\u73af\u63a5\u6536\u7684\u7ed3\u679c\njenkins docker kubernetes\n$@ \u5faa\u73af\u63a5\u6536\u7684\u7ed3\u679c\njenkins\ndocker\nkubernetes<\/code><\/pre>\n<h5>\u53c2\u6570\u573a\u666f\u793a\u4f8b<\/h5>\n<p>\u9700\u6c421\uff1a\u901a\u8fc7\u4f4d\u7f6e\u53d8\u91cf\u521b\u5efa<code>linux<\/code>\u7cfb\u7edf\u8d26\u53f7\u53ca\u5bc6\u7801\uff0c\u6267\u884c<code>useradd.sh username password<\/code><\/p>\n<pre><code class=\"language-bash\">cat .\/variable\/useradd.sh\n# $1\u662f\u6267\u884c\u811a\u672c\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c$2\u662f\u6267\u884c\u811a\u672c\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\nuseradd $1\necho &quot;$2&quot; | passwd --stdin $1<\/code><\/pre>\n<p>\u9700\u6c422\uff1a\u901a\u8fc7\u4f4d\u7f6e\u53d8\u91cf\u521b\u5efa<code>linux<\/code>\u7cfb\u7edf\u8d26\u53f7\u53ca\u5bc6\u7801\uff0c\u6267\u884c<code>useradd.sh username password<\/code>\uff0c\u63a7\u5236\u6700\u591a\u4f20\u9012\u4e24\u4e2a\u53c2\u6570<\/p>\n<pre><code class=\"language-bash\">cat .\/variable\/useradd.sh\n# \u5224\u65ad\u4f20\u9012\u7684\u53c2\u6570\u603b\u4e2a\u6570\nif  [ $# -ne 2 ];then\n    echo &quot;USAGE $0 [ UserName &amp;&amp; Password]&quot;\n    exit\nfi\n\n# \u6267\u884c\u4e1a\u52a1\u903b\u8f91\n# $1\u662f\u6267\u884c\u811a\u672c\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c$2\u662f\u6267\u884c\u811a\u672c\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\nuseradd $1\necho &quot;$2&quot; | passwd --stdin $1<\/code><\/pre>\n<p>\u9700\u6c423\uff1a\u901a\u8fc7\u4f4d\u7f6e\u53d8\u91cf\u521b\u5efa<code>linux<\/code>\u7cfb\u7edf\u8d26\u53f7\u53ca\u5bc6\u7801\uff0c\u6267\u884c<code>useradd.sh username password<\/code>\uff0c\u63a7\u5236\u6700\u591a\u4f20\u9012\u4e24\u4e2a\u53c2\u6570\uff0c\u4e14\u5fc5\u987b\u662froot\u8eab\u4efd<\/p>\n<pre><code class=\"language-bash\">cat .\/variable\/useradd.sh\n#!\/usr\/bin\/bash\nif [ $UID -ne 0 ];then\n    echo &quot;$USER Permission Deny! Please Use Root User...&quot;\n    exit\nfi\n# \u5224\u65ad\u4f20\u9012\u7684\u53c2\u6570\u603b\u4e2a\u6570\nif  [ $# -ne 2 ];then\n    echo &quot;USAGE $0 [ UserName &amp;&amp; Password]&quot;\n    exit\nfi\n\n# \u6267\u884c\u4e1a\u52a1\u903b\u8f91\n# $1\u662f\u6267\u884c\u811a\u672c\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c$2\u662f\u6267\u884c\u811a\u672c\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\nuseradd &quot;$1&quot;\necho &quot;$2&quot; | passwd --stdin &quot;$1&quot;<\/code><\/pre>\n<h4>read\u4ea4\u4e92\u4f20\u9012\u53d8\u91cf<\/h4>\n<ul>\n<li>\u9664\u4e86\u81ea\u5b9a\u4e49\u53d8\u91cf\uff0c\u4ee5\u53ca\u7cfb\u7edf\u5185\u7f6e\u53d8\u91cf\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>read<\/code>\u547d\u4ee4\u901a\u8fc7\u4ea4\u4e92\u65b9\u5f0f\u4f20\u9012\u53d8\u91cf<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>read\u9009\u9879<\/th>\n<th>\u9009\u9879\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>-p<\/td>\n<td>\u6253\u5370\u4fe1\u606f<\/td>\n<\/tr>\n<tr>\n<td>-t<\/td>\n<td>\u9650\u5b9a\u65f6\u95f4<\/td>\n<\/tr>\n<tr>\n<td>-s<\/td>\n<td>\u4e0d\u56de\u663e<\/td>\n<\/tr>\n<tr>\n<td>-n<\/td>\n<td>\u6307\u5b9a\u5b57\u7b26\u4e2a\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>1.<code>read<\/code>\u793a\u4f8b\u8bed\u6cd5<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat read.sh\n#!\/usr\/bin\/bash\necho -n &quot;Login: &quot;\nread acc\n\necho -n &quot;Passwd: &quot;\nread pw\n\necho &quot;account: $acc   password: $pw&quot;<\/code><\/pre>\n<ul>\n<li>2.<code>read -p<\/code>\u793a\u4f8b<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat read_2.sh\n#!\/usr\/bin\/bash\n\nread -p &quot;Login: &quot; acc\nread -p &quot;Passwd: &quot; pw\n\necho &quot;account: $acc   password: $pw&quot;<\/code><\/pre>\n<ul>\n<li>3.<code>read -p -t -n -s<\/code>\u793a\u4f8b\uff0c\u9650\u5236\u7528\u6237\u8f93\u5165\u5bc6\u7801\u8d85\u65f6<code>5s<\/code>\uff0c\u5bc6\u7801\u5bc6\u6587\uff0c\u4f4d\u6570\u4e0d\u80fd\u8d85\u8fc76<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat read_3.sh\n#!\/usr\/bin\/bash\n\nread -p &quot;Login: &quot; acc\nread -s -t5 -n6 -p &quot;Passwd: &quot; pw\n\necho &quot;account: $acc   password: $pw&quot;\n<\/code><\/pre>\n<h5>\u573a\u666f1-\u6a21\u62df\u767b\u5f55\u9875\u9762\u811a\u672c<\/h5>\n<ul>\n<li>\u4f7f\u7528<code>read<\/code>\u6a21\u62df<code>linux<\/code>\u767b\u5f55\u9875\u9762\n<ul>\n<li>1.\u5982\u679c\u8f93\u5165\u7528\u6237\u4e3a<code>root<\/code>\uff0c\u5bc6\u7801\u4e3a123\uff0c\u5219\u8f93\u51fa\u6b22\u8fce\u767b\u5f55<\/li>\n<li>2.\u5426\u5219\u8f93\u51fa\u7528\u6237\u6216\u5bc6\u7801\u9519\u8bef<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">#1.\u767b\u5f55\u9875\u9762\u662f\u4ec0\u4e48\u6837\u5b50\n#2.\u4ea4\u4e92\u65b9\u5f0f\u8ba9\u5176\u8f93\u5165\u5bf9\u5e94\u7684\u7528\u6237\u540d+\u5bc6\u7801\n#3.\u5224\u65ad\u8f93\u5165\u7684\u7528\u6237+\u5bc6\u7801\u662f\u5426\u6b63\u786e\n\ncat .\/variable\/login.sh\n#!\/usr\/bin\/bash\n\nSystem=$(hostnamectl | awk &#039;\/Operating\/&#039; | awk -F &#039;: &#039; &#039;{print $NF}&#039;)\nKernel=$(hostnamectl | awk &#039;\/Kernel\/&#039; | awk -F &#039;[: ]+&#039; &#039;{print $2}&#039;)\nKernel_version=$(hostnamectl | awk &#039;\/Kernel\/&#039; | awk -F &#039;[: ]+&#039; &#039;{print $4}&#039;)\n\n# \u6253\u5370\u7cfb\u7edf\u4fe1\u606f\necho $System\necho &quot;$Kernel $Kernel_version on an $(uname -m)&quot;\n\n# \u4ea4\u4e92\u8f93\u5165\nread -p &quot;$(hostname) login: &quot; user\nread -s -p &quot;Password: &quot; pass\necho &quot;&quot;\n\n# \u5224\u65ad\u7528\u6237\u8f93\u5165\u7684\u7528\u6237\u540d+\u5bc6\u7801\u662f\u5426\u6b63\u786e\nif [ $user == &quot;root&quot; -a $pass ==  &quot;123&quot; ];then\n         echo &quot;\u6b22\u8fce $user \u7528\u6237\u767b\u5f55\u8282\u70b9...&quot;\nelse\n         echo &quot;\u7528\u6237\u5bc6\u7801\u9519\u8bef...&quot;\n         exit\nfi<\/code><\/pre>\n<h5>\u573a\u666f2-\u7cfb\u7edf\u5907\u4efd\u811a\u672c<\/h5>\n<ul>\n<li>\u4f7f\u7528<code>read<\/code>\u7f16\u5199\u4e00\u4e2a\u5907\u4efd\u811a\u672c\uff0c\u9700\u8981\u7528\u6237\u4f20\u90122\u4e2a\u53c2\u6570\uff0c\u6e90\u548c\u76ee\u6807\n<ul>\n<li>1.\u63d0\u793a\u7528\u6237\uff0c\u4f60\u9700\u8981\u5907\u4efd\u7684\u6587\u4ef6\u5728\u54ea\u4e2a\u8def\u5f84\u4e0b<\/li>\n<li>2.\u63d0\u793a\u7528\u6237\uff0c\u4f60\u8981\u5907\u4efd\u5230\u54ea\u4e2a\u76ee\u5f55<\/li>\n<li>3.\u4f60\u786e\u5b9a\u8981\u5907\u4efd\u5417\uff1f[ yes | no ]<\/li>\n<li>4.\u5982\u679c\u8f93\u5165<code>yes<\/code>\u5c31\u8fdb\u884c\u5907\u4efd\u7684\u64cd\u4f5c\uff0c\u5982\u679c\u8f93\u5165<code>no<\/code>\u5219\u53d6\u6d88\u5907\u4efd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat backup.sh\n#!\/usr\/bin\/bash\n\ncat &lt;&lt;EOF\n################################################\n\n################Backup Scripts##################\n\n################################################\nEOF\n\nread -p &quot;\u4f60\u8981\u5907\u4efd\u7684\u6e90\u6587\u4ef6\u5728\u54ea\u91cc\uff1a&quot; src_file\nread -p &quot;\u4f60\u8981\u5907\u4efd\u5230\u54ea\u4e2a\u76ee\u5f55\u4e0b\uff1a&quot; dest_dir\nread -p &quot;\u4f60\u8981\u5907\u4efd\u7684\u6e90\u6587\u4ef6 $src_file \u8981\u5907\u4efd\u5230 $dest_dir \u4f60\u786e\u5b9a\u5417\uff1f[ yes | no ]\uff1a&quot; Action\n\nif [ $Action == &quot;yes&quot; ];then\n       cp -rpv $src_file $dest_dir\nelse\n       exit\nfi<\/code><\/pre>\n<h5>\u573a\u666f3-\u63a2\u6d4b\u4e3b\u673a\u5b58\u6d3b\u811a\u672c<\/h5>\n<ul>\n<li>\u4f7f\u7528<code>read<\/code>\u7f16\u5199\u4e00\u4e2a\u63a2\u6d4b\u4e3b\u673a\u5b58\u6d3b\u811a\u672c\uff0c\u9700\u8981\u7528\u6237\u4f20\u9012\u6d4b\u8bd5\u7684<code>IP<\/code>\u5730\u5740<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat ping.sh\n#!\/usr\/bin\/bash\n\nread -p &quot;\u8bf7\u8f93\u5165\u4f60\u8981\u63a2\u6d4b\u7684IP\u5730\u5740\uff1a&quot; Ip\n\nping -W 1 -c 1 $Ip &amp;&gt; \/dev\/null\nif [ $? -eq 0 ];then\n      echo -e &quot;\\e[32m $Ip \u901a... \\e[0m&quot;\nelse\n      echo -e &quot;\\e[31m $Ip \u4e0d\u901a... \\e[0m&quot;\nfi<\/code><\/pre>\n<h5>\u573a\u666f4-\u4fee\u6539\u4e3b\u673a\u540d\u79f0\u811a\u672c<\/h5>\n<ul>\n<li>\u4f7f\u7528<code>read<\/code>\u7f16\u5199\u4e00\u4e2a\u4fee\u6539\u7cfb\u7edf\u4e3b\u673a\u540d\u79f0\u7684\u811a\u672c\n<ul>\n<li>1.\u6253\u5370\u5f53\u524d\u4e3b\u673a\u540d\u79f0<\/li>\n<li>2.\u8be2\u95ee\u7528\u6237\u9700\u8981\u4fee\u6539\u7684\u65b0\u4e3b\u673a\u540d\u79f0\u662f\u4ec0\u4e48<\/li>\n<li>3.\u4f60\u662f\u5426\u8981\u5c06\u65e7\u7684\u4e3b\u673a\u540d\u79f0--&gt;\u65b0\u7684\u4e3b\u673a\u540d\u79f0 [ yes | no]<\/li>\n<li>4.\u8c03\u7528<code>shell<\/code>\u547d\u4ee4\u6267\u884c\u4fee\u6539<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat hostname.sh\n#!\/usr\/bin\/bash\n\nold_host=$(hostname)\n\necho &quot;\u5f53\u524d\u4e3b\u673a\u540d\u79f0\u662f ${old_host} &quot;\nread -p &quot;\u4f60\u8981\u4fee\u6539\u7684\u65b0\u4e3b\u673a\u540d\u79f0\u662f\uff1a&quot; new_host\nread -p &quot;\u4f60\u8981\u5c06 $old_host --&gt; $new_host: [ yes | no ]&quot; Action\n\nif [ $Action == &quot;yes&quot; ];then\n      hostnamectl set-hostname $new_host\nfi<\/code><\/pre>\n<h4>Shell\u53d8\u91cf\u5220\u9664<\/h4>\n<h5>\u4ec0\u4e48\u662f\u53d8\u91cf\u5220\u9664<\/h5>\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u5728\u4e0d\u6539\u53d8\u539f\u6709\u53d8\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u5bf9\u53d8\u91cf\u503c\u8fdb\u884c\u5220\u9664<\/p>\n<h5>\u4e3a\u4ec0\u4e48\u8981\u7528\u53d8\u91cf\u5220\u9664<\/h5>\n<p>\u6bd4\u5982\uff1a\u6211\u4eec\u9700\u8981\u5bf9\u67d0\u4e2a\u53d8\u91cf\u7684\u503c\u8fdb\u884c\u6574\u6570\u6bd4\u5bf9\uff0c\u4f46\u53d8\u91cf\u7684\u503c\u662f\u4e00\u4e2a\u5c0f\u6570\uff0c\u600e\u4e48\u529e\uff1f<br \/>\n\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u53d8\u91cf\u5220\u9664\u7684\u65b9\u5f0f\uff0c\u5c06\u5c0f\u6570\u4f4d\u8fdb\u884c\u5220\u9664\uff0c\u7136\u540e\u518d\u8fdb\u884c\u6574\u6570\u6bd4\u5bf9<\/p>\n<h5>\u53d8\u91cf\u5220\u9664\u7684\u51e0\u79cd\u65b9\u5f0f<\/h5>\n<table>\n<thead>\n<tr>\n<th>\u53d8\u91cf<\/th>\n<th>\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>${\u53d8\u91cf#\u5339\u914d\u89c4\u5219}<\/td>\n<td>\u4ece\u5934\u5f00\u59cb\u5339\u914d\uff0c\u6700\u77ed\u5220\u9664<\/td>\n<\/tr>\n<tr>\n<td>${\u53d8\u91cf##\u5339\u914d\u89c4\u5219}<\/td>\n<td>\u4ece\u5934\u5f00\u59cb\u5339\u914d\uff0c\u6700\u957f\u5220\u9664<\/td>\n<\/tr>\n<tr>\n<td>${\u53d8\u91cf%\u5339\u914d\u89c4\u5219}<\/td>\n<td>\u4ece\u5c3e\u5f00\u59cb\u5339\u914d\uff0c\u6700\u77ed\u5220\u9664<\/td>\n<\/tr>\n<tr>\n<td>${\u53d8\u91cf%%\u5339\u914d\u89c4\u5219}<\/td>\n<td>\u4ece\u5c3e\u5f00\u59cb\u5339\u914d\uff0c\u6700\u957f\u5220\u9664<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>\u53d8\u91cf\u5220\u9664\u8bed\u6cd5\u793a\u4f8b<\/h5>\n<p>\u793a\u4f8b1\uff1a\u4ece\u524d\u5f80\u540e\u5220\u9664\u53d8\u91cf\u5185\u5bb9<\/p>\n<pre><code class=\"language-bash\">url=www.sina.com.cn  # \u5b9a\u4e49\u53d8\u91cf\necho ${url}  # \u8f93\u51fa\u53d8\u91cf\u7684\u503c\nwww.sina.com.cn\necho ${url#*.}  # \u4ece\u524d\u5f80\u540e\uff0c\u6700\u77ed\u5339\u914d\nsina.com.cn\necho ${url##*.}  # \u4ece\u524d\u5f80\u540e\uff0c\u6700\u957f\u5339\u914d\ncn<\/code><\/pre>\n<p>\u793a\u4f8b2\uff1a\u4ece\u540e\u5f80\u524d\u5220\u9664\u53d8\u91cf\u5185\u5bb9<\/p>\n<pre><code class=\"language-bash\">url=www.sina.com.cn  # \u5b9a\u4e49\u53d8\u91cf\necho ${url}  # \u8f93\u51fa\u53d8\u91cf\u7684\u503c\nwww.sina.com.cn\necho ${url%.*}  # \u4ece\u540e\u5f80\u524d\uff0c\u6700\u77ed\u5339\u914d\nwww.sina.com\necho ${url%%.*}  # \u4ece\u540e\u5f80\u524d\uff0c\u6700\u957f\u5339\u914d\nwww<\/code><\/pre>\n<h5>\u573a\u666f1-\u63d0\u53d6\u5185\u5b58\u767e\u5206\u6bd4\u811a\u672c<\/h5>\n<ul>\n<li>\u67e5\u770b\u5185\u5b58\u5f53\u524d\u4f7f\u7528\u72b6\u6001\uff0c\u5982\u679c\u4f7f\u7528\u7387\u8d85\u8fc780%\u5219\u544a\u8b66\n<ul>\n<li>1.\u5982\u4f55\u83b7\u53d6\u5185\u5b58\u6307\u6807\uff1a<code>free -m<\/code><\/li>\n<li>2.\u62ff\u5230\u4f7f\u7528\u7387\u7684\u767e\u5206\u6bd4\uff1a<code>free -m | awk &#039;\/^Mem\/ {print $3\/$2*100}&#039;<\/code><\/li>\n<li>3.\u4e0e\u5b9a\u4e49\u7684\u9608\u503c80%\u505a\u6bd4\u5bf9<\/li>\n<li>4.\u8d85\u8fc780%\uff0c\u5219\u544a\u8b66\uff0c\u5426\u5219\u6ca1\u6709\u4efb\u4f55\u63d0\u793a<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat memory_use.sh\n#!\/usr\/bin\/bash\n\nMem_Use=$(free -m | awk &#039;\/^Mem\/ {print $3\/$2*100}&#039;)\n\nif [ ${Mem_Use%.*} -ge 9 ]\nthen\n    echo &quot;Memory is error ${Mem_Use}%&quot;\nelse\n    echo &quot;Memory is ok ${Mem_Use}%&quot;\nfi<\/code><\/pre>\n<h5>\u573a\u666f2-\u4e3a\u4e0d\u540c\u7248\u672c\u7cfb\u7edf\u5b89\u88c5\u6e90<\/h5>\n<p>\u5199\u4e00\u4e2a\u811a\u672c\uff0c\u5728<code>cetos6<\/code>\u7cfb\u7edf\u4e0a\u8fd0\u884c\u5b89\u88c56\u7684<code>epel<\/code>\uff0c\u5728<code>centos7<\/code>\u7cfb\u7edf\u8fd0\u884c\u5219\u5b89\u88c57\u7684<code>epel<\/code><br \/>\n1.\u5224\u65ad\u7cfb\u7edf\u7684\u7248\u672c\uff1a<code>cat \/etc\/redhat-release | awk &#039;{print $(NF-1)}&#039;<\/code><\/p>\n<p>2.\u6839\u636e\u4e0d\u540c\u7684\u7248\u672c\u5b89\u88c5\u4e0d\u540c\u7684\u6e90<\/p>\n<pre><code class=\"language-bash\">cat epel.sh\n#!\/usr\/bin\/bash\n\nsystem_version=$(cat \/etc\/redhat-release | awk &#039;{print $(NF-1)}&#039;)\n\n# -ne \u4e0d\u7b49\u4e8e -eq \u7b49\u4e8e\nif [ ${system_version%%.*} -eq 7 ];then\n    wget -O \/etc\/yum.repos.d\/epel.repo https:\/\/mirrors.aliyun.com\/repo\/epel-7.repo &amp;&gt; \/etc\/null\n    echo &quot;centos ${system_version} epel OK&quot;\nfi\n\nif [ ${system_version%%.*} -eq 6 ];then\n    wget -O \/etc\/yum.repos.d\/epel.repo https:\/\/mirrors.aliyun.com\/repo\/epel-archive-6.repo &amp;&gt; \/etc\/null\n    echo &quot;centos ${system_version} epel OK&quot;\nfi<\/code><\/pre>\n<h4>Shell\u53d8\u91cf\u66ff\u6362<\/h4>\n<h5>\u4ec0\u4e48\u662f\u53d8\u91cf\u66ff\u6362<\/h5>\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u5728\u4e0d\u6539\u53d8\u539f\u6709\u53d8\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u5bf9\u53d8\u91cf\u8fdb\u884c\u66ff\u6362<br \/>\n\u6bd4\u5982\uff1a\u539f\u672c\u8f93\u51fa<code>linux<\/code>\u662f\u5c0f\u5199\uff0c\u53ef\u4ee5\u5c06\u5176\u8f6c\u4e3a<code>LINUX<\/code>\u5927\u5199\uff0c\u6216\u8005\u76f4\u63a5\u5220\u9664<\/p>\n<h5>\u53d8\u91cf\u66ff\u6362\u7684\u65b9\u5f0f<\/h5>\n<table>\n<thead>\n<tr>\n<th>\u53d8\u91cf<\/th>\n<th>\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>${\u53d8\u91cf\/\u65e7\u5b57\u7b26\u4e32\/\u65b0\u5b57\u7b26\u4e32}<\/td>\n<td>\u66ff\u6362\u53d8\u91cf\u5185\u7684\u65e7\u5b57\u7b26\u4e32\u4e3a\u65b0\u5b57\u7b26\u4e32\uff0c\u53ea\u66ff\u6362\u7b2c\u4e00\u4e2a<\/td>\n<\/tr>\n<tr>\n<td>${\u53d8\u91cf\/\/\u65e7\u5b57\u7b26\u4e32\/\u65b0\u5b57\u7b26\u4e32}<\/td>\n<td>\u66ff\u6362\u53d8\u91cf\u5185\u7684\u65e7\u5b57\u7b26\u4e32\u4e3a\u65b0\u5b57\u7b26\u4e32\uff0c\u5168\u90e8\u66ff\u6362<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>\u573a\u666f1-\u66ff\u6362PATH\u53d8\u91cf<\/h5>\n<ul>\n<li>\u5982\u4f55\u66ff\u6362<code>$PATH<\/code>\u4e2d\u7684<code>\/bin<\/code>\u66ff\u6362\u4e3a<code>\/BIN<\/code><\/li>\n<\/ul>\n<pre><code class=\"language-bash\">echo $PATH\n\/usr\/local\/sbin:\/usr\/local\/bin:\/usr\/sbin:\/usr\/bin:\/root\/.local\/bin:\/root\/bin\n\n# \u66ff\u6362\u64cd\u4f5c\necho ${PATH\/\/bin\/BIN}\n\/usr\/local\/sBIN:\/usr\/local\/BIN:\/usr\/sBIN:\/usr\/BIN:\/root\/.local\/BIN:\/root\/BIN<\/code><\/pre>\n<h5>\u573a\u666f2-\u5b57\u7b26\u4e32\u66ff\u6362\u811a\u672c<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u53d8\u91cf<code>string=&quot;Bigdata process is Hadoop,Hadoop is open source project&quot;<\/code>\u6267\u884c\u811a\u672c\u540e\uff0c\u6253\u5370\u8f93\u51fa<code>string<\/code>\u53d8\u91cf\uff0c\u5e76\u7ed9\u51fa\u7528\u6237\u4ee5\u4e0b\u9009\u9879\n<ul>\n<li>1.\u6253\u5370<code>string<\/code>\u957f\u5ea6<\/li>\n<li>2.\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u7684<code>Hadoop<\/code><\/li>\n<li>3.\u66ff\u6362\u7b2c\u4e00\u4e2a<code>Hadoop<\/code>\u4e3a<code>Linux<\/code><\/li>\n<li>4.\u66ff\u6362\u5168\u90e8<code>Hadoop<\/code>\u4e3a<code>Linux<\/code><\/li>\n<li>\u7528\u6237\u8f93\u5165\u6570\u5b57<code>1|2|3|4<\/code>\uff0c\u53ef\u4ee5\u6267\u884c\u5bf9\u5e94\u9879\u7684\u529f\u80fd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">cat replace.sh\n#!\/usr\/bin\/bash\n\nstring=&quot;Bigdata process is Hadoop, Hadoop is open source project&quot;\n\necho $string\necho &quot;1)\u3001\u6253\u5370string\u957f\u5ea6&quot;\necho &quot;2)\u3001\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u7684Hadoop&quot;\necho &quot;3)\u3001\u66ff\u6362\u7b2c\u4e00\u4e2aHadoop\u4e3aLinux&quot;\necho &quot;4)\u3001\u66ff\u6362\u5168\u90e8Hadoop\u4e3aLinux&quot;\n\nread -p &quot;\u8bf7\u8f93\u5165\u5bf9\u5e94\u7684\u9009\u9879 [ 1 | 2 | 3 | 4 | ]&quot; Action\n\nif [ $Action -eq 1 ];then\n    echo &quot;\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u662f\uff1a${#string}&quot;\nfi\n\nif [ $Action -eq 2 ];then\n    echo &quot;${string\/\/Hadoop\/}&quot;\nfi\n\nif [ $Action -eq 3 ];then\n    echo &quot;${string\/Hadoop\/Linux}&quot;\nfi\n\nif [ $Action -eq 4 ];then\n    echo &quot;${string\/\/Hadoop\/Linux}&quot;\nfi<\/code><\/pre>\n<h4>Shell\u53d8\u91cf\u8fd0\u7b97<\/h4>\n<h5>\u4ec0\u4e48\u662f\u53d8\u91cf\u8fd0\u7b97<\/h5>\n<ul>\n<li>\u5176\u5b9e\u5c31\u662f\u6211\u4eec\u4ee5\u524d\u5b66\u4e60\u8fc7\u7684 \u52a0 \u51cf \u4e58 \u9664<\/li>\n<\/ul>\n<h5>\u4e3a\u4ec0\u4e48\u9700\u8981\u53d8\u91cf\u8fd0\u7b97<\/h5>\n<ul>\n<li>\u5f53\u6211\u4eec\u9700\u8981\u5f00\u53d1\u4e00\u4e2a\u8ba1\u7b97\u5668\u7a0b\u5e8f\u65f6\uff0c\u662f\u4e0d\u662f\u5c31\u9700\u8981\u8fd0\u7b97\u4e86\uff1f<\/li>\n<li>\u5f53\u6211\u4eec\u8981\u5bf9\u7ed3\u679c\u8fdb\u884c\u5355\u4f4d\u6362\u7b97\u65f6\uff0c\u662f\u4e0d\u662f\u5c31\u9700\u8981\u53d8\u91cf\u8fd0\u7b97\u4e86\uff1f<\/li>\n<\/ul>\n<h5>\u53d8\u91cf\u8fd0\u7b97\u5b9e\u73b0\u7684\u65b9\u5f0f<\/h5>\n<ul>\n<li>\u901a\u5e38\u6574\u6570\u8fd0\u7b97\u6709<code>expr\u3001$(())\u3001$[]<\/code>\u7b49\u65b9\u5f0f\uff0c\u5c0f\u6570\u8fd0\u7b97\u6709<code>bc\u3001awk<\/code>\u65b9\u5f0f<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>\u64cd\u4f5c\u7b26<\/th>\n<th>\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>num1 + num2<\/td>\n<td>\u52a0<\/td>\n<\/tr>\n<tr>\n<td>num1 - num2<\/td>\n<td>\u51cf<\/td>\n<\/tr>\n<tr>\n<td>num1 * num2<\/td>\n<td>\u4e58<\/td>\n<\/tr>\n<tr>\n<td>num1 \/ num2<\/td>\n<td>\u9664<\/td>\n<\/tr>\n<tr>\n<td>num1 % num2<\/td>\n<td>\u4f59<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>\u5b9a\u4e49\u53d8\u91cf\uff0c\u4f7f\u7528<code>expr\u3001$(())\u3001$[]<\/code>\u8fdb\u884c\u52a0\u51cf\u4e58\u9664\u3002<code>expr<\/code>\u5fc5\u987b\u7a7a\u683c\u9694\u5f00\n<pre><code class=\"language-bash\">num1=10\nnum2=20\nexpr $num1 + $num2\n30\necho $(( $num1 + $num2 ))\n30\necho $[ $num1 + $num2 ]\n30<\/code><\/pre>\n<\/li>\n<\/ul>\n<h5>\u573a\u666f1-\u6839\u636e\u5f53\u524d\u65f6\u95f4\u8ba1\u7b97\u660e\u5e74\u65f6\u95f4<\/h5>\n<ul>\n<li>\u6839\u636e\u7cfb\u7edf\u65f6\u95f4\uff0c\u6253\u5370\u4eca\u5e74\u548c\u660e\u5e74\u65f6\u95f4<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">echo &quot;This is $(date +%Y) year&quot;\nThis is 2024 year\necho &quot;This is $[ $(date +%Y) +1 ] year&quot;\nThis is 2025 year<\/code><\/pre>\n<h5>\u573a\u666f2-\u8ba1\u7b97\u4eca\u5e74\u8fd8\u5269\u4e0b\u591a\u5c11\u5468<\/h5>\n<ul>\n<li>\u9700\u6c42\uff1a\u6839\u636e\u7cfb\u7edf\u65f6\u95f4\u83b7\u53d6\u4eca\u5e74\u8fd8\u5269\u4e0b\u591a\u5c11\u5174\u8da3\uff0c\u5df2\u7ecf\u8fc7\u4e86\u591a\u5c11\u661f\u671f\u3002\u601d\u8def\u5982\u4e0b\uff1a<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">echo &quot;\u4eca\u5e74\u5df2\u7ecf\u8fc7\u4e86 $(date +%j) days&quot;\n\u4eca\u5e74\u5df2\u7ecf\u8fc7\u4e86 125 days\necho &quot;\u4eca\u5e74\u5df2\u7ecf\u8fc7\u4e86 $[ $(date +%j)\/7 ] weeks&quot;\n\u4eca\u5e74\u5df2\u7ecf\u8fc7\u4e86 17 weeks\necho &quot;\u4eca\u5e74\u8fd8\u5269\u4e0b $[ (365 - $(date +%j))\/7 ] weeks&quot;\n\u4eca\u5e74\u8fd8\u5269\u4e0b 34 weeks<\/code><\/pre>\n<h5>\u53d8\u91cf\u9ed8\u8ba4\u503c<\/h5>\n<ol>\n<li>\n<p><code>${var:-string}<\/code><br \/>\n\u82e5\u53d8\u91cf<code>var<\/code>\u4e3a\u7a7a\u65f6\uff0c\u5219\u7528<code>string<\/code>\u4f5c\u4e3a\u53d8\u91cf<code>var<\/code>\u7684\u503c<br \/>\n\u82e5\u53d8\u91cf<code>var<\/code>\u4e0d\u4e3a\u7a7a\u65f6\uff0c\u5219\u76f4\u63a5\u4f7f\u7528\u53d8\u91cf<code>var<\/code>\u7684\u503c<\/p>\n<\/li>\n<li>\n<p><code>${var:=string}<\/code><br \/>\n\u82e5\u53d8\u91cf<code>var<\/code>\u4e3a\u7a7a\u65f6\uff0c\u5219\u7528<code>string<\/code>\u4f5c\u4e3a\u53d8\u91cf<code>var<\/code>\u7684\u503c\uff1b\uff08\u540c\u65f6\u5c06<code>string<\/code>\u8d4b\u7ed9\u53d8\u91cf<code>var<\/code>\uff09<br \/>\n\u82e5\u53d8\u91cf<code>var<\/code>\u4e0d\u4e3a\u7a7a\u65f6\uff0c\u5219\u76f4\u63a5\u4f7f\u7528\u53d8\u91cf<code>var<\/code>\u7684\u503c<br \/>\n<code>${var:=string}<\/code>\u5f88\u5e38\u7528\u7684\u4e00\u79cd\u7528\u6cd5\u662f\uff0c\u5224\u65ad\u67d0\u4e2a\u53d8\u91cf\u662f\u5426\u8d4b\u503c\uff0c\u6ca1\u6709\u7684\u8bdd\u5219\u7ed9\u5b83\u8d4b\u4e0a\u4e00\u4e2a\u9ed8\u8ba4\u503c<\/p>\n<\/li>\n<li>\n<p><code>${var:+string}<\/code><br \/>\n\u82e5\u53d8\u91cf<code>var<\/code>\u4e3a\u7a7a\u65f6\uff0c\u5219\u4e0d\u66ff\u6362\u6216\u8005\u8bf4\u662f\u66ff\u6362\u6210<code>var<\/code>\u7684\u503c\uff0c\u5373\u7a7a\u503c\u3002\uff08\u56e0\u4e3a\u53d8\u91cf<code>var<\/code>\u6b64\u65f6\u4e3a\u7a7a\uff0c\u6240\u4ee5\u8fd9\u4e24\u79cd\u8bf4\u6cd5\u662f\u7b49\u4ef7\u7684\uff09<br \/>\n\u82e5\u53d8\u91cf<code>var<\/code>\u4e0d\u4e3a\u7a7a\u65f6\uff0c\u5219\u5c06<code>string<\/code>\u4f5c\u4e3a<code>var<\/code>\u53d8\u91cf\u7684\u503c\uff0c\u540c\u65f6\u5c06<code>string<\/code>\u8d4b\u503c\u7ed9<code>var<\/code>\u53d8\u91cf<\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Shell\u811a\u672c\u6982\u8ff0 \u4ec0\u4e48\u662fshell shell\u662f\u4e00\u4e2a\u547d\u4ee4\u89e3\u91ca\u5668\uff0c\u5b83\u5728\u64cd\u4f5c\u7cfb\u7edf\u7684\u6700\u5916\u5c42\uff0c\u8d1f\u8d23\u76f4\u63a5\u4e0e\u7528\u6237\u8fdb\u884c\u5bf9\u8bdd&#8230; &raquo; <a class=\"read-more-link\" href=\"http:\/\/blue.yn.cn\/?p=698\">\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-698","post","type-post","status-publish","format-standard","hentry","category-shell"],"_links":{"self":[{"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts\/698","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=698"}],"version-history":[{"count":23,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts\/698\/revisions"}],"predecessor-version":[{"id":1527,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=\/wp\/v2\/posts\/698\/revisions\/1527"}],"wp:attachment":[{"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=698"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blue.yn.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}