grep --extended-regexp --ignore-case "search_pattern" path/to/file - 【重要】Print 3 lines of context around, before, or after each match: grep --context|before-context|after-context=3 "search_pattern" path/to/file - 【重要】Print file name and line number for each match with color ...
从addr1 这行到往下 N 行匹配,总共匹配 N+1行7、 addr1, ~N Will match addr1 and the lines following addr1 until the next line whose input line number is a multiple of N.【没有看懂是什么意思】 简单实例 sed'/north/p'ceshi.txt #打印ceshi.txt文件中所有的行同时匹配到north的行打印两遍...
-v, --invert-match Invert matching. Show lines that do not match the given patterns. -w, --word-regexp Only show matches surrounded by word boundaries. This is roughly equivalent to putting \b before and after all of the search patterns. -x, --line-regexp Only show matches surrounded ...
Stop reading a file after NUM matching lines. If the input is standard input from a regular file, and NUM matching lines are output, grep ensures that the standard input is positioned to just after the last matching line before exiting, regardless of the presence of trailing context lines. T...
The grep command is used to search text or searches the given file for lines containing a match to the given strings or words. By default, grep displays the matching lines. Use grep to search for lines of text that match one or many regular expressions, and outputs only the matching lines...
使用grep -v 可以实现 NOT 操作。-v 选项用来实现反选匹配的( invert match)。如,可匹配得到除下指定pattern外的所有lines。 grep -v 'par1' filename 2、将NOT操作与其他操作联合起来,以此实现更强大的功能组合 示例(将得到:'a1或者a2,但是不是a3'的结果): ...
grep -b10 "bug" info.log # 查看"bug"字符前的10行，b->before。grep -c10 "bug" info.log...
To match blank lines, use the pattern ‘^[[:blank:]]*$’. 即,grep 命令认为每一行都包含空字符串,所以提供的匹配模式为空字符串时,会匹配到所有行。 匹配模式写为 '^'、'$'、'.*',也是会匹配到所有行。 如果想要匹配空行,匹配模式可以写为 '^$',空行只包含一个行末的换行符。 如果想要匹配只...
For example, to display all the lines containing the string bash from the /etc/passwd file, you would run the following command: 例如,要显示/etc/passwd 文件中包含字符串 bash 的所有行,可以运行以下命令: grep bash /etc/passwd 输出应该是这样的: ...
-v, --invert-match:显示不能被模式匹配到的行; -E:支持使用扩展的正则表达式元字符; -q, --quiet, --silent:静默模式,即不输出任何信息; -A #:after, 后#行 -B #:before,前#行 -C #:context,前后各#行 ...