How do you grep with a dash?

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How do you grep with a dash?

An alternative you can use instead of the double dash is -e . For example, grep -w -e -r (or grep -we -r ) would have the same result as grep -w — -r in the example above. -e allows specifying a search pattern, and it can be used to protect a pattern beginning with a dash ( – ).

How do you escape hyphen in grep?

3 Answers

  1. use — , as @Rinzwind said in his answer, to make grep to hnow that the options ended.
  2. use \ to escape the hyphen ( – ): sudo find / -name “*” | xargs grep -sn –color=auto “\-j”
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How do I use special characters in grep search?

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 you grep a string with a period?

For example, perhaps the most common “special character” in grep is the dot: “.”. In grep, a dot character will match any character except a return. But what if you only want to match a literal dot? If you escape the dot: “\.”, it will only match another literal dot character in your text.

What character used with grep will anchor a grep search to the start of a line?

#1) Anchor Characters: ‘^’ and ‘$’ at the beginning and end of the pattern are used to anchor the pattern to the start of the line, and to the end of the line respectively. Example: “^Name” matches all lines that start with the string “Name”.

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How does the grep command work?

The grep command can search for a string in groups of files. When it finds a pattern that matches in more than one file, it prints the name of the file, followed by a colon, then the line matching the pattern.

How do I Grep a specific pattern in a bash script?

So for example, if you have a bash script that has a loop, and you want to fetch one match per loop iteration, then using ‘grep -m1’ will do the needful. If you want, you can also make the grep command obtain patterns from a file. The tool’s -f command-line option lets you do this.

How to use grep to search for more than two words?

To search for more than two words, keep adding them in the same manner. For example, to search for three words, add the desired string of characters followed by a backslash and pipe: Let’s see how the above grep command looks when using grep -E, egrep, and grep -e: We will use grep in further examples, but you can use whichever syntax you prefer.

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How can I search for patterns in a file using grep?

If you want, you can also make the grep command obtain patterns from a file. The tool’s -f command-line option lets you do this. For example, suppose you want to search all the .txt files in the current directory for words “how” and “to”, but want to supply these input strings through a file named, say, “input,” then here’s how you can do this:

What is the basic grep command syntax?

2 The basic grep command syntax. The basic grep command syntax is as follows: grep ‘word’ filename grep ‘word’ file1 file2 file3 grep ‘string1 string2’ filename cat otherfile | grep ‘something’ command | grep ‘something’ command option1 | grep ‘data’ grep –color ‘data’ fileName.