A regular expression, regex or regexp is a sequence of characters that define a search pattern. Usually such patterns are used by string searching algorithms for “find” or “find and replace” operations on strings, or for input validation.
For Cyber Security Regex is used to check logs for network intrusions, so we have compiled the perfect Regex cheat sheet for you.
Click on any of the images to expand.
By Dave Child (DaveChild)
Linux Security Blog 