Grep regular expression note

Grep regular expression note: 2013092123: 49: 182211793627 http: dsfafdfessafsdfasdafsearchhtm? Q % E5 % A5 % B3 % E8 % A3 % 85% E7 % A7 % 8B % E8 % A3 % 85% E8 % BF % 9E % E8 % A1 % A3 % E8 % A3 % 99 & am grep regular expression note: 20130921 23:49:18 221.179.36.27 http://dsfafdfessafsdfasdaf/search.htm?q=%E5%A5%B3%E8%A3%85%E7%A7%8B%E8%A3%85%E8%BF%9E%E8%A1%A3%E8%A3%99&pid=mm_43496014_4148986_13478587&ttid=momo_mZPlutzDp9DL30q0-QuSNg& S8safbdo.com 200 46175 A2E08AFDAB132C1800011CSY cmwap 10.114.215.79 GPRS/edge get application/vnd.wap.xhtml + xml; charset = utf-8 1 NONE Mozilla/5.0 (Linux; U; Android 4.1.1; zh-CN; DXG111_3 Build/JRO03C) AppleWebKit/534.31 (KHTML, like Gecko) UCBrowser/9.2.4.329 U3/0.8.0 Mobile Safari/534.31 01 63632 52176 1. search for 1 NONE of them: grep-Ec '[\ d \ D] * (1 \ s * NONE) [\ d \ D] * 'wk_access.log.20130921v.tmp 2. search for 01 of them: gr Ep-c '[[: space:] 01 [[: space:] 'wk_access.log.20130921v.tmp involves knowledge points: the posix (The Portable Operating SystemInterface) adds a special character class to support The basic regular expression, extended regular expression, and posix POSIX characters in order to maintain one character encoding in different countries, for example, [: alnum:] is another way of writing a A-Za-z0-9. Put them in the [] sign to become a regular expression, such as [A-Za-z0-9] or [[: alnum:]. In linux, grep supports POSIX character classes except fgrep. [: Alnum:] character [: alpha:] character [: digit:] digit character [: graph:] non-null character (non-space, control character )[: lower:] lowercase character [: cntrl:] control character [: print:] non-empty character (including space) [: punct:] punctuation [: space:] all blank characters (new lines, spaces, tabs) [: upper:] uppercase characters [: xdigit:] hexadecimal numbers (0-9, a-f, A-F)