Article directory
wc
Count the number of bytes, words, and lines of a file
Additional information
The wc command counts the number of bytes, words, and lines in the specified file, and displays and outputs the statistical results. We can use the wc command to calculate the number of Bytes, words, or columns of a file. If the file name is not specified, or the file name is given as "-", the wc command will read data from the standard input device. wc also gives the total count of the specified files.
grammar
wc(选项)(参数)
wc [选项]... [文件]...
wc [选项]... --files0-from=F
options
-cCount the number of bytes, or--bytes: display the number of Bytes.-lCount the number of rows, or--lines: display the number of columns.-mCount the number of characters, or--chars: display the number of characters.-wCount word count, or--words: display word count. A word is defined as a string of characters separated by whitespace, tab, or newline characters.-LPrint the length of the longest line, or--max-line-length.--helpDisplay help information.--versionDisplay version information.
parameter
File: List of files to be counted.
example
Count the number of lines and the total number of lines in all files in the current directory:
wc -l *
.jsCount the number of file lines and the total number of lines of all suffixes in the current directory :
wc -l *.js
The number of lines and the total number of lines in all files in the current directory and subdirectories:
find . * | xargs wc -l
Check the number of bytes, words, and lines of the file:
wc test.txt
The output is:
7 8 70 test.txt
Among them, 7represents the number of lines, 8represents the number of words, 70represents the number of bytes, test.txtand is the file name.
How to use wc command to print only statistics but not file names:
wc -l < test.txt
The output is:
7
Used to count the number of files in the current directory (excluding hidden files):
expr $(ls -l | wc -l) - 1
The output is:
8
Count the number of lines and the total number of lines in all files in the current directory:
[root@centos7 ~]# wc -l *
21 LICENSE
270 README.md
wc: example: read: Is a directory
785 lerna-debug.log
25 lerna.json
wc: node_modules: read: Is a directory
23603 package-lock.json
79 package.json
3 renovate.json
24786 total
Learn from scratchpython
[Learn python from scratch] 92. Use Python’s requests library to send HTTP requests and process responses
[Learn python from scratch] 91. Use decorators and dictionaries to manage request paths in a simple web application
[Learn python from scratch] 93. Use dictionary management Request path
[Learn python from scratch] 89. Use WSGI to build a simple and efficient Web server
[Learn python from scratch] 88. Detailed explanation of WSGI interface: realize simple and efficient web development
[Learn python from scratch] 87. Manually build an HTTP server in Python Implementation and multi-threaded concurrent processing
[Learn python from scratch] 86. In-depth understanding of the HTTP protocol and its role in browser and server communication
[Learn python from scratch] 85. Application of parallel computing technology in Python process pool
[Learn python from scratch] ] 84. In-depth understanding of threads and processes
[Learn python from scratch] 83. Python multi-process programming and the use of process pools
[Learn python from scratch] 82. Chat program implementation based on multi-threading
[Learn python from scratch] 81. Python more Application of thread communication and queue
[Learn python from scratch] 80. Thread access to global variables and thread safety issues
[Learn python from scratch] 79. Thread access to global variables and thread safety issues
[Learn python from scratch] 78. File download case
[ Learn python from scratch] 77. TCP server programming and precautions
[learn python from scratch] 76. Server and client: key components of network communication
[learn python from scratch] 75. TCP protocol: reliable connection-oriented transmission layer communication protocol
[Learn python from scratch] 74. UDP network program: Detailed explanation of port issues and binding information
[Learn python from scratch] 73. UDP network program - sending data
[Learn python from scratch] 72. In-depth understanding of Socket communication and creation of sockets Method
[Learn python from scratch] 71. Network ports and their functions
[Learn python from scratch] 70. Network communication methods and their applications: from direct communication to routers to connect multiple networks
[Learn python from scratch] 69. Network communication and IP address classification analysis
[Learn python from scratch] 68. Greedy and non-greedy modes in Python regular expressions
[Learn python from scratch] 67. The re module in Python: regular replacement and advanced matching technology
[Learn python from scratch] 66 .In-depth understanding of regular expressions: a powerful tool for pattern matching and text processing
[Learn python from scratch] 65. Detailed explanation of Python regular expression modifiers and their applications
[Learn python from scratch] 64. The re.compile method in Python regular expressions Detailed explanation of usage
[Learn python from scratch] 63. Introduction to the re.Match class and its attributes and methods in regular expressions
[Learn python from scratch] 62. Python regular expressions: a powerful string matching tool
[Learn python from scratch] 61. Detailed explanation and application examples of property attributes in Python
[Learn python from scratch] 60. Exploration generator: a flexible tool for iteration
[Learn python from scratch] 59. Iterator: An efficient tool for optimizing data traversal
[Learn python from scratch] 58. Custom exceptions in Python and methods of raising exceptions
[Learn python from scratch] 57. Use the with keyword in Python to correctly close resources
[Learn python from scratch] 56. The importance and application of exception handling in programming
[Learn python from scratch] 55. Serialization and sum in Python Deserialization, application of JSON and pickle modules
[Learn python from scratch] 54. Writing data in memory
[Learn python from scratch] 53. CSV files and Python’s CSV module
[Learn python from scratch] 52. Reading and writing files - Python file operation guide
[Learn python from scratch] 51. Opening and closing files and their applications in Python
[Learn python from scratch] 49. Object-related built-in functions in Python and their usage
[Learn python from scratch] 48 .Detailed explanation of inheritance and multiple inheritance in Python
[Learn python from scratch] 47. The concept and basic use of inheritance in object-oriented programming
[Learn python from scratch] 46. Analysis of __new__ and __init__ methods and singletons in Python Design Patterns
[Learn python from scratch] 45. Class methods and static methods in Python
[Learn python from scratch] 44. Private properties and methods in object-oriented programming
[Learn python from scratch] 43. Examples in Python object-oriented programming Properties and class attributes
[Learn python from scratch] 42. Built-in properties and methods in Python
[Learn python from scratch] 41. python magic method (2)
[Learn python from scratch] 40. python magic method (1)
[Learn python from scratch] 39. Basic object-oriented syntax and application examples
[Learn python from scratch] 38. How to use and import Python packages
[Learn python from scratch] 37. The use and precautions of Python custom modules
[Learn python from scratch] Learn python] 36. Methods and techniques of using pip for third-party package management in Python
[Learn python from scratch] 35. Common Python system modules and their usage
[Learn python from scratch] 34. Detailed explanation of the import and use of Python modules
[ Learn python from scratch] 33. The role of decorators (2)
[Learn python from scratch] 32. The role of decorators (1)
[Learn python from scratch] 31. In-depth understanding of higher-order functions and closures in Python
[From Learn python from scratch】30. In-depth understanding of recursive functions and anonymous functions
【learn python from scratch】29. "Detailed explanation of function parameters" - understand the different uses of Python function parameters
【learn python from scratch】28. Local variables and global variables in Python Variables
[Learn python from scratch] 27. The use of Python functions and nested calls
[Learn python from scratch] 25. Functions: a tool to improve the efficiency of code writing
[Learn python from scratch] 24. String operations and traversal methods in Python
[Learn python from scratch] 23. How to use sets (set) and common operations in Python
[Learn python from scratch] 22. Add, delete, modify, and query dictionary variables in Python
[Learn python from scratch] 21. Python tuples and dictionaries
[Learn python from scratch] 20. Python list operation skills and examples
[Learn python from scratch] 19. Applications of looping through lists and list nesting
[Learn python from scratch] 18. Detailed explanation of the basic operations of Python lists (1)
[From Learning python from scratch】 17. The format method of Python strings (2)
【Learning python from scratch】 16. The format method of Python strings (1)
【Learning python from scratch】 15. In-depth understanding of strings and character set encoding
【From Learning python from scratch】14. Common operations on Python strings (2)
【Learning python from scratch】13. Common operations on Python strings (1)
【Learning python from scratch】12. Python string operations and applications
【Learning python from scratch】 11. Python loop statements and control flow
[Learn python from scratch] 10. Detailed explanation of Python conditional statements and if nesting
[Learn python from scratch] 09. Conditional judgment statements in Python
[Learn python from scratch] 08. Python understands bit operations operator, operator priority
[Learn python from scratch] 07. Detailed explanation of Python operators: assignment, comparison and logical operators
[Learn python from scratch] 06. Use arithmetic operators in Python for calculations and string concatenation
[Learn from scratch] python ] 05. Output and input in Python
[Learn python from scratch] 04. Basics of Python programming: variables, data types and identifiers
[Learn python from scratch] 03. Python interactive programming and detailed explanation of comments
[Learn python from scratch] 02. Introduction to development tools
[Learn python from scratch] 01. Install and configure python