Regular Expressions 101

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

Group 1([0-9]+ +){4}

{4}repeats the group contents below exactly 4 times:

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

Group 2([a-z]+ [a-z]+)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

Group 3(\/dev\/sd[a-z0-9]+)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

devthe literal text dev (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

sdthe literal text sd (case sensitive)

Character Class[a-z0-9]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

 +([0-9]+ +){4}([a-z]+ [a-z]+) +(\/dev\/sd[a-z0-9]+)

Test String
New

    Number   Major   Minor   RaidDevice State
   0       8        1        0      active sync   /dev/sda1
   4       8      144        0      spare rebuilding   /dev/sdj
   1       8       97        1      active sync   /dev/sdg1
   2       8      113        2      active sync   /dev/sdh1
   3       8       81        3      active sync   /dev/sdf1

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
Processing...