The grep stands for “global regular expression print,” processes text line by line, and prints any lines which match a specified pattern. GREP is a multi-purpose file search tool that uses Regular Expressions. Here are the some most important test procession tool that we will discuss in this blog In this blog, we are going to learn some most important text processing tools. Linux shell has a number of useful tools that help us do various text processing tasks. In our everyday work, we need to search text, extract parts of the text, modify the text, and sort text. iname "*.Play with text in Linux: Linux is a widely-used open-source operating system that provides a large number of text processing tools. c extension and run wc command against them to find their line counts one by one. In the example, we will search for files with. wc can be used on the search results to count lines or others. find search according to specified parameters. $ grep "^int" *.c | wc -l Usage With Grep Usage With FindĪnother useful usage is using with find command. In this example, we want to count the lines where those provide int string. By using grep the content of the resource files is filtered and then counted with wc. $ ls -lh | wc -lĬount Files And Directories Usage With GrepĪnother useful usage wc is using it with grep. In the example, we use ls command to list all files and directories line by line and redirect to the wc. Wc can be used to count files and directories by using ls command output. $ cat *.c | wc Redirect To wc Multiple Files Count Files And Directories In the example, we will redirect all files with. Redirecting multiple files is the same as a single file we just print files according to their names or extensions. $ cat case_sensitive.c | wc Redirect To wc File Redirect To wc Multiple Files In this example we simply print file case_sensitive.c to the standard output and this standard output is redirected with pipe operator to the wc as standard input which is processes like a file by wc. By using bash capabilities external text can be redirected to the wc as input like below. External input is a very useful feature of the wc. Wc is generally used with other tools or external input. $ wc -l case_sensitive.c Count Lines Redirect To wc File If we only want to count lines -l option can be used. $ wc -w case_sensitive.c Count Words Count Lines If we only want to count words the -w option can be used. $ wc -m case_sensitive.c Count Chars Count Words If we only want to get the number of chars we can use m options like below. In the example, we provide a file named case_sensitive.c which seems to be a C source file and get the number of lines which is 9, number of words which is 11 and number of bytes or chars which is 78 $ wc case_sensitive.c Count All Bytes, Words and Lines Count Chars If we want to get all results wc can provide we should use it without any option like below. $ wc -help Help Count All Bytes, Words and LinesĪs we stated before wc is a little tool. wc.įast help about the wc can get with the following command. In this tutorial, we will look at how to count bytes? How to count words? How to count Lines? and How to use wc with other Linux commands like find and grep? Syntax This tool is a little tool less than 10 options. Linux provides a lot of tools for text-related operations.
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