30 Grep Examples

1. What is grep command with example?
2. How use grep command in Unix with example?
3. How do I use grep to find words?
4. How do I grep an IP address?
5. What GREP means?
6. What is difference between grep and Egrep?
7. How do you grep special characters?
8. How do I grep two words in Linux?
9. What is grep equivalent in Windows?
10. What is awk script?
11. How do you grep for multiple words?

What is grep command with example?

Grep is an acronym that stands for Global Regular Expression Print. 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.

How use grep command in Unix with example?

Grep Command in Unix with Simple Examples

1. Example: “^Name” matches all lines that start with the string “Name”. ...
2. Example:“^. ...
3. Example: “\$\*” will match the lines that contain the string “$*”
4. Example: “[aeiou]” will match all lines that contain a vowel. ...
5. Examples:

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 grep an IP address?

Now if you want to search for lines containing IP addresses, you'll need to use some regular expressions. An IP address is basically a dot separated sequence of 4 numbers each having 1 to 3 digits. So we can represent it this way: grep '[0-9]\1,3\\.

What GREP means?

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 is difference between grep and Egrep?

grep and egrep does the same function, but the way they interpret the pattern is the only difference. Grep stands for "Global Regular Expressions Print", were as Egrep for "Extended Global Regular Expressions Print". ... The grep command will check whether there is any file with .

How do you grep special characters?

To match a character that is special to grep –E, put a backslash ( \ ) in front of the character. It is usually simpler to use grep –F when you don't need special pattern matching.

How do I grep two words in Linux?

How do I grep for multiple patterns?

1. Use single quotes in the pattern: grep 'pattern*' file1 file2.
2. Next use extended regular expressions: egrep 'pattern1|pattern2' *. py.
3. Finally, try on older Unix shells/oses: grep -e pattern1 -e pattern2 *. pl.
4. Another option to grep two strings: grep 'word1\|word2' input.

What is grep equivalent in Windows?

The findstr command is a Windows grep equivalent in a Windows command-line prompt (CMD). In a Windows PowerShell the alternative for grep is the Select-String command.

What is awk script?

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. ... Awk is mostly used for pattern scanning and processing.

How do you grep for multiple words?

The basic grep syntax when searching multiple patterns in a file includes using the grep command followed by strings and the name of the file or its path. The patterns need to be enclosed using single quotes and separated by the pipe symbol. Use the backslash before pipe | for regular expressions.