Regular Expressions 101

GRUB_CMDLINE_LINUX="the literal text GRUB_CMDLINE_LINUX=" (case sensitive)

Non-Capturing Group(?:\s*?([\w=]+)\s*?)+

+repeats the group contents below at least once:

\s*?any whitespace character, repeated any number of times

Group 1([\w=]+)

Character Class[\w=]+

+matches at least one character from the set below:

\wany word character

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\s*?any whitespace character, repeated any number of times

"the literal " (34₁₀ / 42₈ / 22₁₆)

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

GRUB_CMDLINE_LINUX="(?:\s*?([\w=]+)\s*?)+"

New

GRUB_CMDLINE_LINUX="cgroup_enable=memory foo=bar swapaccount=1 lala=moo"