\u6d89\u53ca\u91cd\u590d\u7684\u5143\u5b57\u7b26<\/p>\n
Repetition: A regular expression may be followed by one of several repetition operators:\r\n? The preceding item is optional and matched at most once.\r\n* The preceding item will be matched zero or more times.\r\n+ The preceding item will be matched one or more times.\r\n{n} The preceding item is matched exactly n times.\r\n{n,} The preceding item is matched n or more times.\r\n{,m} The preceding item is matched at most m times. This is a GNU extension.\r\n{n,m} The preceding item is matched at least n times, but not more than m times.<\/code><\/pre>\n\u4e0e\u901a\u914d\u7684\u8054\u7cfb\uff1a<\/p>\n
*: \u5339\u914d\u4efb\u610f\u957f\u5ea6\u7684\u4efb\u610f\u5b57\u7b26\r\n?\uff1a\u5339\u914d\u4efb\u610f\u5355\u4e2a\u5b57\u7b26\r\n[]\uff1a\u5339\u914d\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4efb\u610f\u5355\u4e2a\u5b57\u7b26\r\n[abc], [a-m], [a-z], [A-Z], [0-9], [a-zA-Z], [0-9a-zA-Z]\r\n[:space:]\uff1a\u7a7a\u767d\u5b57\u7b26\r\n[:punct:]\uff1a\u6807\u70b9\u7b26\u53f7\r\n[:lower:]\uff1a\u5c0f\u5199\u5b57\u6bcd\r\n[:upper:]: \u5927\u5199\u5b57\u6bcd\r\n[:alpha:]: \u5927\u5c0f\u5199\u5b57\u6bcd\r\n[:digit:]: \u6570\u5b57\r\n[:alnum:]: \u6570\u5b57\u548c\u5927\u5c0f\u5199\u5b57\u6bcd\r\n\u6ce8\u610f, \u5982\u4e0a\u7684\u90e8\u5206\u8868\u793a\u7684\u662f\u4e00\u4e2a\u8303\u56f4, \u800c\u5982\u679c\u548c[]\u8054\u5408\u4f7f\u7528, \u4ee5\u5339\u914d\u5355\u4e2a\u5b57\u7b26\u7684\u8bdd, \u9700\u8981\u5728\u5916\u9762\u518d\u5305\u4e00\u5c42[]:\r\n[[:space:]] ... ...<\/code><\/pre>\n\u4f8b\u9898\uff1aClick<\/a><\/p>\n# \u8fc7\u6ee4sql-pipeline-v2.0\u5f00\u5173\uff0c\u4e2d\u95f4\u591a\u4e2a\u6570\u5b57\u3001\u5b57\u6bcd\u3001_\u3001\/\u3001.\uff0c\u4ee5.sh\u7ed3\u5c3e\u7684\u4e32\r\negrep -o 'sql-pipeline-v2.0([[:alnum:]]|_|-|\/|\\.){1,}\\.sh' \/tmp\/list.txt<\/code><\/pre>\n <\/p>\n
\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1aliutianfeng.com<\/a> » bash grep \u6b63\u5219<\/a><\/p>","protected":false},"excerpt":{"rendered":"\u6d89\u53ca\u91cd\u590d\u7684\u5143\u5b57\u7b26 Repetition: A regular expression may be follow […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[57],"tags":[],"_links":{"self":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/1228"}],"collection":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1228"}],"version-history":[{"count":3,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/1228\/revisions"}],"predecessor-version":[{"id":1415,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/1228\/revisions\/1415"}],"wp:attachment":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}