{"id":692,"date":"2014-07-22T02:07:18","date_gmt":"2014-07-22T02:07:18","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=692"},"modified":"2014-07-22T02:07:18","modified_gmt":"2014-07-22T02:07:18","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8shell%e4%b8%ad%e8%ae%a1%e7%ae%97%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%bf%e5%ba%a6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/692.html","title":{"rendered":"\u5982\u4f55\u5728Shell\u4e2d\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6\uff1f"},"content":{"rendered":"

\u8fd1\u671f\u5728\u6574\u7406\u4e4b\u524d\u7684\u7b14\u8bb0\u65f6\u53d1\u73b0\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u662f\u4ece \u8336\u8bdd\u6c47<\/a>\u00a0\u4e0a\u770b\u5230\u7684\uff0c\u81ea\u5df1\u5b9e\u9645\u6d4b\u8bd5\u4e86\u4e00\u4e0b\uff0c\u5728\u6b64\u505a\u4e2a\u8bb0\u5f55\uff1a<\/p>\n

\u65b9\u6cd51: \u4f7f\u7528wc -L\u547d\u4ee4<\/span><\/h6>\n
wc -L\u53ef\u4ee5\u83b7\u53d6\u5230\u5f53\u524d\u884c\u7684\u957f\u5ea6\uff0c\u56e0\u6b64\u5bf9\u4e8e\u5355\u72ec\u884c\u7684\u5b57\u7b26\u4e32\u53ef\u4ee5\u7528\u8fd9\u4e2a\u7b80\u5355\u7684\u65b9\u6cd5\u83b7\u53d6\uff0c\u53e6\u5916wc -l\u5219\u662f\u83b7\u53d6\u5f53\u524d\u5b57\u7b26\u4e32\u5185\u5bb9\u7684\u884c\u6570\u3002<\/span><\/div>\n
echo “abc” | wc -L<\/span><\/div>\n
\u65b9\u6cd52: expr length string<\/span><\/h6>\n
\u4f7f\u7528expr length\u53ef\u4ee5\u83b7\u53d6string\u7684\u957f\u5ea6<\/span><\/div>\n
\u65b9\u6cd53:\u00a0awk\u83b7\u53d6\u57df\u7684\u4e2a\u6570<\/span><\/b><\/span><\/h6>\n
echo “abc” |awk -F “” ‘{print NF}’<\/span><\/div>\n
\u65b9\u6cd54:\u00a0\u901a\u8fc7awk+length\u7684\u65b9\u5f0f\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6<\/span><\/b><\/span><\/h6>\n
echo \u201cAlex\u201d|awk ‘{print length($0)}’<\/span><\/div>\n
\u65b9\u6cd55:\u00a0\u901a\u8fc7echo ${#string}\u7684\u65b9\u5f0f<\/span><\/b><\/span><\/h6>\n
\uff08\u6ce8\u610f\uff1a\u8fd9\u91cc\u7684string\u662f\u8be5\u5b57\u7b26\u4e32\u7684\u53d8\u91cf\u540d\uff09<\/span><\/div>\n
name=Alex<\/span><\/div>\n
echo ${#name}<\/span><\/div>\n
\u539f\u6587\u5730\u5740\uff1a<\/h6>\n
[Linux]\u5982\u4f55\u5728Shell\u811a\u672c\u4e2d\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6\uff1f<\/a><\/div>\n
\n
\u5f53\u5b57\u7b26\u4e32\u4e2d\u542b\u6709\u8f6c\u4e49\u5b57\u7b26\u65f6\uff0c\u9075\u4ece\u4e0b\u9762\u7684\u7ed3\u8bba<\/span>\uff1a<\/h6>\n
1. \u82e5\u8f6c\u4e49\u5b57\u7b26\u540e\u8ddf\u968f\u7684\u662f\u7279\u6b8a\u5b57\u7b26\uff0c\u4f8b\u5982\uff1a$\uff0c\u90a3\u4e48\u5728\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\uff0c\u4f1a\u81ea\u52a8\u5c06\u8f6c\u4e49\u7b26\u6392\u9664\u6389\uff1b
\n2. \u82e5\u8f6c\u4e49\u5b57\u7b26\u540e\u8ddf\u968f\u7684\u4e0d\u662f\u7279\u6b8a\u5b57\u7b26\uff0c\u800c\u662f\u5b57\u6bcd\u3001\u6570\u5b57\u4e4b\u7c7b\u7684\uff0c\u90a3\u4e48\u5728\u8ba1\u7b97\u5b57\u7b26\u4e32\u957f\u5ea6\u65f6\uff0c\u5219\u4f1a\u5c06\u8f6c\u4e49\u7b26\u8ba1\u7b97\u5728\u5185\u3002<\/strong><\/div>\n
<\/div>\n
\n
\u9a8c\u8bc1\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/h6>\n

\u9a8c\u8bc1\u573a\u666f1\uff1a<\/strong>\u5f53\u8f6c\u4e49\u7b26\u540e\u8ddf\u968f\u7684\u4e0d\u662f\u7279\u6b8a\u5b57\u7b26\uff0c\u662f\u5b57\u6bcd\u7684\u573a\u666f\uff0c\u8fd9\u65f6\u8ba1\u7b97\u51fa\u6765\u7684\u5b57\u7b26\u4e32str=\u201dabcn\u201d\u7684\u957f\u5ea6\u662f5<\/p>\n

[root@tektea ~]# str=”abcn”
\n[root@tektea ~]# echo $str | wc -L
\n5
\n[root@tektea ~]# echo $str | awk -F “” ‘{print NF}’
\n5
\n[root@tektea ~]# echo $str | awk ‘{print length($0)}’
\n5
\n[root@tektea ~]# echo ${#str}
\n5<\/p>\n

\u9a8c\u8bc1\u573a\u666f2\uff1a<\/strong>\u5f53\u8f6c\u4e49\u7b26\u540e\u8ddf\u968f\u7684\u662f\u7279\u6b8a\u5b57\u7b26\uff0c\u8fd9\u65f6\u8ba1\u7b97\u51fa\u6765\u7684\u5b57\u7b26\u4e32str=\u201dabc$\u201d\u7684\u957f\u5ea6\u662f4<\/p>\n

[root@tektea ~]# str=”abc$”
\n[root@tektea ~]# echo $str | wc -L
\n4
\n[root@tektea ~]# echo $str | awk -F “” ‘{print NF}’
\n4
\n[root@tektea ~]# echo $str | awk ‘{print length($0)}’
\n4
\n[root@tektea ~]# echo ${#str}
\n4<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u8fd1\u671f\u5728\u6574\u7406\u4e4b\u524d\u7684\u7b14\u8bb0\u65f6\u53d1\u73b0\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u662f\u4ece \u8336\u8bdd\u6c47\u00a0\u4e0a\u770b\u5230\u7684\uff0c\u81ea\u5df1\u5b9e\u9645\u6d4b\u8bd5\u4e86\u4e00\u4e0b\uff0c\u5728\u6b64\u505a\u4e2a\u8bb0\u5f55\uff1a \u65b9\u6cd51: \u4f7f […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,11],"tags":[30,65],"class_list":["post-692","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","tag-linux","tag-shell"],"views":2088,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/692","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=692"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/692\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}