With no FILE, read . if a command-line -r is given, - otherwise. If fewer than two FILEs are given, assume -h. Exit status is 0 if any line is selected, 1 otherwise; if any error occurs and -q is not given, the exit status is 2. 三、选项说明 代码语言:javascript 代码运行次数...
PATTERNS is one or more patterns separated by newline characters, and grep prints each line that matches a pattern. Typically PATTERNS should be quoted when grep is used in a shell command. A FILE of “-” stands for standard input. If no FILE is given, recursive searches examine the ...
--context=NUM print NUM lines of output context-NUM same as--context=NUM--group-separator=SEP use SEP as a group separator--no-group-separator use empty string as a group separator--color[=WHEN],--colour[=WHEN] use markers to highlight the matching...
Thegrepcommand searches/var/log/syslogfor lines containing "ERROR" and prints them. Case matters—only exact matches appear. Usecat /var/log/syslogto verify the file’s content first. If no matches, no output is shown. It’s a simple way to spot issues in logs quickly. Case-Insensitive ...
--help Print a usage message briefly summarizing these command-line options and the bug-reporting address, then exit. -V, --version Print the version number of grep to the standard output stream. This version number should be included in all bug reports (see below). ...
2. Sample Text File Thegrepfilter searches a file for a particular pattern of characters and displays all lines that contain that pattern.We’ll use thegrepcommand to search a string in a text file and then print the surrounding lines.Let’s create a file by redirecting the output of the...
Help about Select-String can be get with the following command. 可以通过以下命令获取有关Select-String帮助。 AI检测代码解析 PS> get-help Select-String 1. Help 帮帮我 在文件中搜索字符串(Search String In A File) One of the simplest usage and most used feature is simply searching given string...
Grepis a command-line tool that allows you to find a string in a file or stream. It can be used with a regular expression to be more flexible at finding strings. This page gives an introduction to grep. For more information enter: ...
grep - print lines matching a patterngrep [OPTIONS] PATTERN [FILE...] grep [OPTIONS] [-e PATTERN | -f FILE] [FILE...]
Search for PATTERN in each FILE or standard input. PATTERN is, by default, a basic regular expression (BRE). Example: grep -i 'hello world' menu.h main.c Regexp selection and interpretation: -E, --extended-regexp PATTERN is an extended regular expression (ERE) ...