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Can you find three vowels in a row with grep?
This finds three vowels in a row. To disallow Roman numerals, and only valid Roman numerals (i.e. VI, VII, IX, XIV, are all valid, but VIX is not) you need a much more complicated setup and probably shouldn’t be using just grep. Thanks for contributing an answer to Unix & Linux Stack Exchange!
How to grep 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:
How to find all words with at least one vowel?
To find all words containing each vowel at least once (in any order), the simplest command is Add -i if you need to be case-insensitive. This is a bit of a trick question, IMO, since grep does not possess a true AND operator.
Can you use grep to search multiple strings?
You can grep multiple strings in different files and directories. The tool prints all lines that contain the words you specify as a search pattern. In this guide, we will show you how to use grep to search multiple words or string patterns.
How to grep rows that have certain value in a specific column?
The OP is wanting to use grep, which will print the whole line when a match is found, so the only thing to do is create the pattern that matches all and only what is required. Simplicity itself, and no reason to use sed or awk as `grep can handle the source as a file or a pipe.
How to match all vowels in a string?
Instead of trying to match a string containing all the vowels, try to match the opposite: a string that is missing at least one of the vowels. (From here on out, I’m sticking with the assumption of one word per line in the input.) A word that’s missing the a matches ^ [^a]*$ (from beginning to end, it’s made of characters other than a ).
Can you use regular expression grep in Perl?
(Note: \\S from perl is available in many regexp engines, possibly including the grep you use, but perl-compatible regular expressions are not a standard grep feature so [^ ] it must be.) I wouldn’t attempt to write either of those regexps by hand.