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- Detailed explanation of grep usage grep and regular expressions
- Regular expressions are just a representation. As long as the tool supports this representation, the tool can process regular expression strings. vim, grep, awk, and sed all support regular expressions, and it is precisely because they support regular expressions that they are powerful; in the company I worked in before, because the company was a web-based service website (nginx), regular expressions were The demand is relatively large, so I spent some time studying regular rules, and I would like to share them with you:
- PHP开发 1287 2016-12-13 14:28:03
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- linux pipeline command grep
- The grep command is used to find files whose content contains the specified template style. If the content of a file is found to match the specified template style, the default grep command will display the column containing the template style. If no file name is specified, or the file name given is "-", the grep command will read data from the standard input device.
- PHP开发 1332 2016-12-13 14:26:05
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- 14 grep command usage examples
- This article mainly introduces 14 grep command usage examples. This article explains how to find patterns in files, find patterns in multiple files, use the -l parameter to list the file names of files containing specified patterns, and use the -n parameter. Find the specified pattern in the file and display the line number of the matching line and other contents. Friends in need can refer to the following
- PHP开发 1892 2016-12-13 14:23:10
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- Git's Patch function
- Most software development in the UNIX world is collaborative, so Patch is a very important thing, because almost all ordinary contributors to large UNIX projects submit code through Patch. As one of the most important open source projects, Linux is also like this.
- PHP开发 1378 2016-12-13 14:16:44
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- Detailed explanation of linux grep command
- grep (global search regular expression(RE) and print out the line, comprehensive search for regular expressions and print out the line) is a powerful text search tool that can use regular expressions to search for text and print out matching lines. come out. The Unix grep family includes grep, egrep and fgrep. The egrep and fgrep commands are only slightly different from grep. egrep is an extension of grep and supports more re metacharacters. fgrep is fixed grep or fast grep, which treats all letters as words, that is
- PHP开发 1358 2016-12-13 14:13:23
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- linux grep command
- The grep command in Linux system is a powerful text search tool. It can search text using regular expressions and print out the matching lines. The full name of grep is Global Regular Expression Print, which means the global regular expression version. Its usage permissions are for all users.
- PHP开发 1310 2016-12-13 14:00:09
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- linux svn use
- This article introduces the use of SVN under Linux in detail. I hope it can help everyone.
- PHP开发 1146 2016-12-13 13:52:42
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- Find common usage examples in Linux
- This article describes Linux find usage examples
- PHP开发 1132 2016-12-13 13:49:48
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- About void main() in C language
- Many people and even some books on the market use void main(), which is actually wrong. void main( ) has never been defined in C/C++. Bjarne Stroustrup, the father of C++, clearly stated in the FAQ on his homepage that The definition void main( ) { /* ... */ } is not and never has been C++, nor has it even been C.( void main ( ) never existed in C++ or C). Next, let me talk about the main function in the C and C++ standards respectively.
- PHP开发 1479 2016-12-13 13:26:51
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- void and void* in C/C++
- The void keyword represents the concept of "empty type". However, the "empty type" here does not mean "any type", but means that it does not exist. That is to say, C/C++ does not allow you to write the statement void a, and there is no thing of type void.
- PHP开发 1312 2016-12-13 13:17:30
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- Deeply understand the meaning of void and void pointers
- This article provides a detailed analysis and introduction to the meaning of void and void pointers. Friends in need can refer to it
- PHP开发 1580 2016-12-13 13:15:53
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- Detailed explanation of void and void*
- Rules for using void keyword: 1. If the function has no return value, it should be declared as void type; 2. If the function has no parameters, then its parameters should be declared as void; 3. If the function parameters can be pointers of any type, then Its parameters should be declared as void *; 4. void cannot represent a real variable; void embodies an abstraction, and all variables in this world are "typed"
- PHP开发 4483 2016-12-13 13:14:35
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- The use and difference between intval() and (int) conversion under PHP
- Wondering what the difference is between using intval() and (int) conversion? Or what are the differences between the two, including functions and definitions. Or related to frequency of use, efficiency, etc.
- PHP开发 1490 2016-12-13 13:03:02
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- Detailed explanation of PHP page encoding declaration method (header or meta)
- The difference between PHP page encoding declaration and using header or meta to implement PHP page encoding
- PHP开发 1223 2016-12-13 12:00:17
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- linux command: top command
- The top command is a commonly used performance analysis tool under Linux. It can display the resource usage of each process in the system in real time, similar to the Windows Task Manager. The following describes how to use it in detail. top is a dynamic display process, that is, the current status can be continuously refreshed through the user's keystrokes. If this command is executed in the foreground, it will occupy the foreground exclusively until the user terminates the program. To be more precise, the top command provides real-time control of the system Processor status monitoring. It will display a list of the most CPU "sensitive" tasks in the system. This command can sort tasks by CPU usage, memory usage and execution time; and many features of this command can be accessed through interactive commands or Make settings in the personal customization file.
- PHP开发 1817 2016-12-13 11:59:35
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