Grep Command in Linux (Find Text in Files)

Grep is a Linux / Unix command-line tool used to search for a string of characters in a specified file. The text search pattern is called a regular expression. When it finds a match, it prints the line with the result. The grep command is handy when searching through large log files.

1. How do you grep text in a file in Linux?
2. How do I use grep to find words?
3. How do I search for a specific word in a file in Unix?
4. How do I search for a string in a directory in Linux?
5. How do I search for all text in a file in Linux?
6. How do I find a file in Linux command-line?
7. How do I search for text in Linux?
8. What is grep command?
9. What options can be used with grep command?
10. What is the command to search a word?
11. How do I grep recursively in a directory?
12. How do I search for a file in Unix?

How do you grep text in a file in Linux?

The grep command searches through the file, looking for matches to the pattern specified. To use it type grep , then the pattern we're searching for and finally the name of the file (or files) we're searching in. The output is the three lines in the file that contain the letters 'not'.

How do I use grep to find words?

The easiest of the two commands is to use grep's -w option. This will find only lines that contain your target word as a complete word. Run the command "grep -w hub" against your target file and you will only see lines that contain the word "hub" as a complete word.

How do I search for a specific word in a file in Unix?

The UNIX Grep command searches files for a user-specified text pattern. It returns a list of the matching words or shows each line of text that contains them. You can broaden the results by using wildcards. Grep also has the ability to count instances of a search phrase that appear in a file.

How do I search for a string in a directory in Linux?

Finding text strings within files using grep

1. -r – Recursive search.
2. -R – Read all files under each directory, recursively. ...
3. -n – Display line number of each matched line.
4. -s – Suppress error messages about nonexistent or unreadable files.

How do I search for all text in a file in Linux?

To find files containing specific text in Linux, do the following.

1. Open your favorite terminal app. XFCE4 terminal is my personal preference.
2. Navigate (if required) to the folder in which you are going to search files with some specific text.
3. Type the following command: grep -iRl "your-text-to-find" ./

How do I find a file in Linux command-line?

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"

How do I search for text in Linux?

Grep is a Linux / Unix command-line tool used to search for a string of characters in a specified file. The text search pattern is called a regular expression. When it finds a match, it prints the line with the result. The grep command is handy when searching through large log files.

What is grep command?

grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. Its name comes from the ed command g/re/p (globally search for a regular expression and print matching lines), which has the same effect.

What options can be used with grep command?

Command-line options aka switches of grep:

• -e pattern.
• -i: Ignore uppercase vs. ...
• -v: Invert match.
• -c: Output count of matching lines only.
• -l: Output matching files only.
• -n: Precede each matching line with a line number.
• -b: A historical curiosity: precede each matching line with a block number.

What is the command to search a word?

The keyboard shortcut Ctrl+f (hold down the control key and tap f) works in all browsers. The Find command lets you enter a word. Each time you push the Enter/Return button on your keyboard or click the Find button, that word will be found and highlighted in the text on the Web page you are reading.

How do I grep recursively in a directory?

To recursively search for a pattern, invoke grep with the -r option (or --recursive ). When this option is used grep will search through all files in the specified directory, skipping the symlinks that are encountered recursively.

How do I search for a file in Unix?

Syntax

1. -name file-name – Search for given file-name. You can use pattern such as *. ...
2. -iname file-name – Like -name, but the match is case insensitive. ...
3. -user userName – The file's owner is userName.
4. -group groupName – The file's group owner is groupName.
5. -type N – Search by file type.