How do you grep multiple numbers?

How do you grep multiple numbers?

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.

How do you grep digits?

Specifically: [0-9] matches any digit (like [[:digit:]] , or \d in Perl regular expressions) and {4} means “four times.” So [0-9]{4} matches a four-digit sequence. [^0-9] matches characters not in the range of 0 through 9 . It is equivalent to [^[:digit:]] (or \D , in Perl regular expressions).

Does grep work with numbers?

grep -o will print only the matching part of the line. Otherwise grep will print any lines with the pattern. the accepted answer ignores there could be numbers in the previous lines of the file, it does work for the example data, but what if the file was remote? In this example output.

Is there a way to match multiple numbers in grep?

I found out that in grep, it is actually [ [:digit:]] that matches numbers. While I managed to understand why there are double brackets, I cannot figure out a way to match with multiple integers. It will fail to match anything.

How to grep for groups of n digits, but no more than n?

Here it is: grep a line from a file which contains 4 numbers in a row but not more than 4. I’m not sure how to approach this. I can search for specific numbers but not their amount in a string.

How do I fetch only numbers in grep?

You can use grep -E to access the extended regular expression syntax ( Same as egrep) I have created a testfile with below contents: will be output. Here “-o” is used to only output the matching segment of the line, rather than the full contents of the line.

What’s the best regex-grep regular expression for digits?

To match anything but a digit, you can use [^0-9]. Since that can be any number of , or no chars, you add a “*” (any number of the preceding). So what you’ll want is logically