You asked: How do I grep a specific string in Linux?

How do I grep a string in Linux?

To search multiple files with the grep command, insert the filenames you want to search, separated with a space character. The terminal prints the name of every file that contains the matching lines, and the actual lines that include the required string of characters. You can append as many filenames as needed.

How do you search for a specific word in Linux?

How to Find a Specific Word in a File on Linux

  1. grep -Rw ‘/path/to/search/’ -e ‘pattern’
  2. grep –exclude=*.csv -Rw ‘/path/to/search’ -e ‘pattern’
  3. grep –exclude-dir={dir1,dir2,*_old} -Rw ‘/path/to/search’ -e ‘pattern’
  4. find . – name “*.php” -exec grep “pattern” {} ;

How do I grep unique strings in Linux?


  1. Using grep and head command. Pipe the output of grep command to head command to get the first line. …
  2. Using m option of grep command. The m option can be used to display the number of matching lines. …
  3. Using the sed command. We can also use the sed command to print unique occurrence of a pattern. …
  4. Using awk command.
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How do I search for a string in a directory in Linux?

Finding text strings within files using grep

-R – Read all files under each directory, recursively. Follow all symbolic links, unlike -r grep option. -n – Display line number of each matched line. -s – Suppress error messages about nonexistent or unreadable files.

What is PS EF command in Linux?

This command is used to find the PID (Process ID, Unique number of the process) of the process. Each process will have the unique number which is called as PID of the process.

What is grep in Linux command?

Grep is an essential Linux and Unix command. It is used to search text and strings in a given file. In other words, grep command searches the given file for lines containing a match to the given strings or words. It is one of the most useful commands on Linux and Unix-like system for developers and sysadmins.

How do I search for text in all files in Linux?

grep can be used even if we’re not looking for a string. Simply running, grep -RIl “” . will print out the path to all text files, i.e. those containing only printable characters.

What is Search command in Linux?

The Linux Find Command is one of the most important and frequently used command command-line utility in Unix-like operating systems. Find command is used to search and locate the list of files and directories based on conditions you specify for files that match the arguments.

How do I search for a filename in Linux?

Basic Examples

  1. find . – name thisfile.txt. If you need to know how to find a file in Linux called thisfile. …
  2. find /home -name *.jpg. Look for all . jpg files in the /home and directories below it.
  3. find . – type f -empty. Look for an empty file inside the current directory.
  4. find /home -user randomperson-mtime 6 -iname “.db”
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How do I find unique lines in Linux?

Find unique lines

  1. The file must be sorted first. sort file | uniq -u will output to console for you. – …
  2. I think the reason sort file | uniq shows all the values 1 time is because it immediately prints the line it encounters the first time, and for the subsequent encounters, it just skips them. –


How do I get unique entries in Linux?

To find unique occurrences where the lines are not adjacent a file needs to be sorted before passing to uniq . uniq will operate as expected on the following file that is named authors. txt . As duplicates are adjacent uniq will return unique occurrences and send the result to standard output.

What is the use of awk in Linux?

Awk is a scripting language used for manipulating data and generating reports. The awk command programming language requires no compiling, and allows the user to use variables, numeric functions, string functions, and logical operators.

How do I grep a string in a directory?

  1. grep -RIn <yor pattern> * Will search from current directories down in all text files. …
  2. Wildcard with –include=”*.C” option, @user311346, thanks to @Lekensteyn. – …
  3. Use the find and grep combination to recursively search files for a string in current and all sub directories.


How do I grep a directory?

To grep All Files in a Directory Recursively, we need to use -R option. When -R options is used, The Linux grep command will search given string in the specified directory and subdirectories inside that directory. If no folder name is given, grep command will search the string inside the current working directory.

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How do I grep words in all files in a directory?

GREP: Global Regular Expression Print/Parser/Processor/Program. You can use this to search the current directory. You can specify -R for “recursive”, which means the program searches in all subfolders, and their subfolders, and their subfolder’s subfolders, etc. grep -R “your word” .

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