{"id":7429,"date":"2022-10-28T16:25:13","date_gmt":"2022-10-28T08:25:13","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429"},"modified":"2024-12-21T16:51:00","modified_gmt":"2024-12-21T08:51:00","slug":"shell%e8%af%ad%e6%b3%95%e5%9d%91","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429","title":{"rendered":"shell\u57fa\u672c\u8bed\u6cd5"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#%E4%B8%80%E3%80%81%E5%9F%BA%E6%9C%AC%E8%AF%AD%E6%B3%95\" title=\"\u4e00\u3001\u57fa\u672c\u8bed\u6cd5\">\u4e00\u3001\u57fa\u672c\u8bed\u6cd5<\/a><ul class=\"ez-toc-list-level-2\"><li class=\"ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#%E5%A4%9A%E5%91%BD%E4%BB%A4%E6%89%A7%E8%A1%8C%E9%80%BB%E8%BE%91\" title=\"\u591a\u547d\u4ee4\u6267\u884c\u903b\u8f91\">\u591a\u547d\u4ee4\u6267\u884c\u903b\u8f91<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#if\" title=\"if\">if<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#for\" title=\"for\">for<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#%E5%8C%85%E5%90%AB%E5%AD%90shell%E6%96%87%E4%BB%B6\" title=\"\u5305\u542b\u5b50shell\u6587\u4ef6\">\u5305\u542b\u5b50shell\u6587\u4ef6<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#eval%E5%91%BD%E4%BB%A4\" title=\"eval\u547d\u4ee4\">eval\u547d\u4ee4<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#exit%E4%B8%8Ereturn\" title=\"exit\u4e0ereturn\">exit\u4e0ereturn<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#%E4%BA%8C%E3%80%81%E6%95%B0%E5%80%BC%E8%BF%90%E7%AE%97\" title=\"\u4e8c\u3001\u6570\u503c\u8fd0\u7b97\">\u4e8c\u3001\u6570\u503c\u8fd0\u7b97<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7429\/#%E4%B8%89%E3%80%81%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97\" title=\"\u4e09\u3001\u903b\u8f91\u8fd0\u7b97\">\u4e09\u3001\u903b\u8f91\u8fd0\u7b97<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E4%B8%80%E3%80%81%E5%9F%BA%E6%9C%AC%E8%AF%AD%E6%B3%95\"><\/span>\u4e00\u3001\u57fa\u672c\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"%E5%A4%9A%E5%91%BD%E4%BB%A4%E6%89%A7%E8%A1%8C%E9%80%BB%E8%BE%91\"><\/span>\u591a\u547d\u4ee4\u6267\u884c\u903b\u8f91<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/blog.csdn.net\/u011630575\/article\/details\/97613695\">https:\/\/blog.csdn.net\/u011630575\/article\/details\/97613695<\/a><\/p>\n<p>\u540c\u65f6\u6267\u884c\u591a\u6761\u8bed\u53e5<br \/>\ncommand1 || {<br \/>\nstatement1<br \/>\nstatement2<br \/>\nstatement3<br \/>\n}<\/p>\n<h2><span class=\"ez-toc-section\" id=\"if\"><\/span>if<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>if\u5982\u679c\u6709else\u5206\u652f\uff0c\u5219if\u5206\u652f\u91cc\u5fc5\u987b\u8981\u6267\u884c\u547d\u4ee4\uff0c\u5426\u5219\u62a5\u9519\u3002<\/p>\n<pre><code class=\"language-bash\">win_switch.sh: line 8: syntax error near unexpected token `elif&#039;\nwin_switch.sh: line 8: `elif [ ${option} -eq 2 ];then&#039;<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"for\"><\/span>for<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/blog.csdn.net\/weixin_44175418\/article\/details\/124444938\">https:\/\/blog.csdn.net\/weixin_44175418\/article\/details\/124444938<\/a><\/p>\n<ul>\n<li>\n<p>\u6587\u4ef6\u904d\u5386\uff1a<\/p>\n<pre><code class=\"language-bash\">for file in $(ls \/opt\/control-server\/*console.log)\ndo \nfileDate=${file##*\/}\nfileDate=${fileDate%console*}\nfileDateSeconds=$(date -d &quot;${fileDate}&quot; +%s)\necho &quot;file:${file},fileDateSeconds:${fileDateSeconds}&quot;\n# 10\u5929\u4e4b\u524d\u7684\u65e5\u5fd7\u5220\u9664\nif [ ${fileDateSeconds} -le $((${curDateSeconds} - 10*24*60*60)) ];then\n    echo &quot;\u53d1\u73b0\u8fc7\u671f(\u8d85\u8fc710\u5929)\u65e5\u5fd7\u6587\u4ef6${file}\uff0c\u5220\u9664&quot;  \n    sudo rm -f ${file}\nfi\ndone<\/code><\/pre>\n<\/li>\n<li>\n<p>\u8fde\u7eed\u6574\u6570\u904d\u5386<br \/>\n\u4e0b\u9762\u662f\u6279\u91cf\u5f00\u542f\u9632\u706b\u5899\u7aef\u53e3\u7684\u4ee3\u7801<\/p>\n<pre><code class=\"language-bash\">for port in {9901..9909}\ndo\nresult=$(firewall-cmd --query-port=$port\/tcp --zone=public)\nif [[ &quot;no&quot; =  $result ]];then\n  firewall-cmd --permanent --add-port=$port\/tcp\nfi\n\nresult=$(firewall-cmd --query-port=$port\/udp --zone=public)\nif [[ &quot;no&quot; =  $result ]];then\n  firewall-cmd --permanent --add-port=$port\/udp\nfi\ndone<\/code><\/pre>\n<\/li>\n<li>\n<p>\u53cc\u91cd\u5faa\u73af<br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/511987104\">https:\/\/zhuanlan.zhihu.com\/p\/511987104<\/a><\/p>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8C%85%E5%90%AB%E5%AD%90shell%E6%96%87%E4%BB%B6\"><\/span>\u5305\u542b\u5b50shell\u6587\u4ef6<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"http:\/\/static.kancloud.cn\/dlover\/linuxbashshell\/2009401\">http:\/\/static.kancloud.cn\/dlover\/linuxbashshell\/2009401<\/a><br \/>\n<code>. .\/t1.fish #\u5c06t1.fish\u5f15\u5165<\/code><\/p>\n<h2><span class=\"ez-toc-section\" id=\"eval%E5%91%BD%E4%BB%A4\"><\/span>eval\u547d\u4ee4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/blog.51cto.com\/u_10706198\/1788573\">https:\/\/blog.51cto.com\/u_10706198\/1788573<\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"exit%E4%B8%8Ereturn\"><\/span>exit\u4e0ereturn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/www.jb51.net\/jiaoben\/304275fob.htm\">https:\/\/www.jb51.net\/jiaoben\/304275fob.htm<\/a><\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E4%BA%8C%E3%80%81%E6%95%B0%E5%80%BC%E8%BF%90%E7%AE%97\"><\/span>\u4e8c\u3001\u6570\u503c\u8fd0\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<ul>\n<li>\u53d8\u91cf\u81ea\u589e<\/li>\n<\/ul>\n<p>\u5728Shell\u811a\u672c\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528$((expression))\u6216\u8005let\u547d\u4ee4\u6765\u8fdb\u884c\u81ea\u589e\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e24\u79cd\u65b9\u6cd5\u7684\u793a\u4f8b\uff1a<\/p>\n<p>\u4f7f\u7528$((expression))\u65b9\u5f0f(<strong>\u53d8\u91cf\u4e0d\u9700\u8981\u52a0$\u7b26\u53f7<\/strong>)\uff1a<\/p>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n\n# \u521d\u59cb\u5316\u53d8\u91cf\nnum=1\n\n# \u4f7f\u7528$((expression))\u8fdb\u884c\u81ea\u589e\nnum=$((num + 1))\n\necho &quot;\u81ea\u589e\u540e\u7684\u503c\u4e3a: $num&quot;<\/code><\/pre>\n<p>\u4f7f\u7528let\u547d\u4ee4\uff1a<\/p>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n\n# \u521d\u59cb\u5316\u53d8\u91cf\nnum=1\n\n# \u4f7f\u7528let\u8fdb\u884c\u81ea\u589e\nlet num=num+1\n\necho &quot;\u81ea\u589e\u540e\u7684\u503c\u4e3a: $num&quot;<\/code><\/pre>\n<p>\u4e24\u79cd\u65b9\u6cd5\u90fd\u4f1a\u4f7f\u53d8\u91cfnum\u7684\u503c\u81ea\u589e1\u3002<\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E4%B8%89%E3%80%81%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97\"><\/span>\u4e09\u3001\u903b\u8f91\u8fd0\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<ul>\n<li>\u4e0e\n<pre><code class=\"language-bash\">if [ $a -eq 10 ] &amp;&amp; [ $b -eq 20 ]; then\necho &quot;Both conditions are true&quot;\nelse\necho &quot;At least one condition is false&quot;\nfi<\/code><\/pre>\n<\/li>\n<li>\u6216\n<pre><code class=\"language-bash\">\nif [ $a -lt 10 ] || [ $b -gt 20 ]; then\necho &quot;At least one condition is true&quot;\nelse\necho &quot;No condition is true&quot;\nfi<\/code><\/pre>\n<\/li>\n<\/ul>\n<pre><code><\/code><\/pre>\n<button class=\"simplefavorite-button\" data-postid=\"7429\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 \u4e00\u3001\u57fa\u672c\u8bed\u6cd5\u591a\u547d\u4ee4\u6267\u884c\u903b\u8f91iffor\u5305\u542b\u5b50shell\u6587\u4ef6eval\u547d\u4ee4exit\u4e0ereturn\u4e8c\u3001 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[742],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7429"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7429"}],"version-history":[{"count":15,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7429\/revisions"}],"predecessor-version":[{"id":15304,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7429\/revisions\/15304"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7429"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}