The command along with option -r allows the system to look inside the subdirectories recursively. You can look for a pattern within a whole directory or within the associated subdirectories using the egrep command in Linux. Example 6: Searching for a Pattern in a Directory/Subdirectory Using the “egrep” Command In the given image, you can see that I have found the desired word inside the “ text2.txt” file. ➋ Type the following command in the command prompt: egrep -w pages text2.txt You can do the same by following the steps below. In this example, I will search the word “ pages” inside the file “ text2.txt”. You can search for a specific word inside a file using the egrep command in Linux with option -w. Example 5: Finding Specific Word Using the “egrep” Command in Linux In the image below, you can see that I have found the characters b, c, and d presented in the file “ text2.txt” using the logical operator OR (|). ➋ Type the following command in the command prompt: egrep b|c|d text2.txt To pipe specific characters within a range follow the steps below. Case C: Finding Specified Characters With Logical Operator Using the “egrep” Command in Linux In the following image, you can see that I have found the characters b, c, and d presented in the file “ text2.txt” by specifying the characters within square brackets. To find specified characters inside a file follow the given steps. Case B: Finding Specified Characters Using the “egrep” Command in Linux In the image given, you can see that I have found the characters b, c, and d presented in the file “ text2.txt” using the range. ➋ Type the following command in the command prompt: egrep text2.txt To find characters within a range follow the steps below. Case A: Finding Characters Within a Range Using the “egrep” Command in Linux Below I have described the multiple ways of finding specific characters. To find characters with this command you can use logical operators as well. You can mention the characters explicitly or provide a range of characters. There are several ways to achieve this task. You can search for specific characters inside a file using the egrep command in Linux.
The question mark (?): Indicates any single character.The asterisk (*): Indicates any number of characters including zero characters.In the image below, you can see that I have found the desired pattern inside the “ text.txt” file. ➋ Write the following command in the command prompt: egrep pa_* text.txt You can do the same by following the given process. In this example, I will search for the pattern “ pa_*” inside the file “ text.txt”. The regular expressions include the characters *, ?, _ to match certain patterns. You can use regular expressions to search for a pattern in a file using the egrep command in Linux. Example 3: Using Regular Expressions With the “egrep” Command in Linux In the image below, you can see that I have found the desired string inside the specified files. ➋ Type the following command in the command prompt: egrep page text.txt text2.txt To do the same you can follow the steps below. In this example, I will search the string “ page” inside the files “ text.txt” and “ text2.txt”. You can search inside multiple files for a certain string using the egrep command in Linux. The “sort” Command in Linux Įxample 2: Searching Inside Multiple Files Using the “egrep” Command in Linux.In the given image, you can see that I have found the desired string inside the “ text.txt” file. ➋ Type the following command in the command prompt: egrep page text.txt In this example, I will search to match the string “ page” inside the file “ text.txt”. You can search for a string inside a specific file using the egrep command in Linux.
#EXAMPLE FOR GREP COMMAND IN LINUX DOWNLOAD#
Download this file to work with the “egrep” command in Linux Example 1: Searching Inside a File Using the “egrep” Command in Linux Some of the most useful applications of the egrep command have been illustrated below. The egrep command in Linux is a useful command that enables users to search for words or characters in matching lines/files. Practical Examples of the “egrep” Command in Linux NB: The options in Linux CLI (Command Line Interface) are all case-sensitive, So be cautious while using them.
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