var: grub_opts: 'elevator=noop' name: OPTIMIZ | FSTAB | Set {{ fstab_opts }} replace: dest: /etc/fstab...

name: OPITMIZ | GRUB | Set DISK Scheduler a elevator=noop lineinfile: dest: /etc/default/grub regexp: '^(GRUB_CMDLINE_LINUX_DEFAULT=(?!.elevator=noop).)\"' line: '\1 elevator=noop"' backrefs: yes...

6 pairs of hexadecimal characters separated by either 5 dashes, or 5 colons, or no separators at all. Mixture of separators not allowed.

uuid, Windows Accounts (NetBios), etc.

identify service accounts by common nomenclature types

Get all URLs: www.lapagina.com pagina.com http://www.lapagina.com http://pagina.com https://www.lapagina.es

Find all telephones in text: 968123123 968 123 123 968.123.123 968 12 12 12

Full regex for failed sendings

extract the package name and version name from the apt list --installed command

A solution for capture set/unset/catch a value of param query of URLs. Here is a example code that applies this pattern in JS, but JS doesn't have support to lookbehind.

A more thorough UK postcode validator tested against all UK postcodes on a regular basis, but excluding the special GIRO postcode case out of personal preference. Additionally has capture groups for the In-code and Out-code sections. Requires case insensitive matching.