Regular Expressions 101

^start of line

Group name_of_new_field(?<name_of_new_field>.+?)

.+?any character (except for line terminators), repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?<name_of_new_field>.+?)\.

New

ir7utbws001.Feb-12-2016.043./dev/sdi 
ir7mojavs12.Feb-12-2016.043./dev/sda1 
Gcase-field-ogs-batch-004-staging.dec-12-2016.043 
sb7sdamb002.Feb-12-2016.043./dev/sdn 
ebase73-ist-bat-002.Feb-12-2016.043./dev/sda1 
ik2itpcp002.Feb-12-2016.043./dev/sda1 
ebase-field-ods-batch-003.Feb-12-2016.043./dev/sdi 
Leo-batch-001.Feb-12-2016.043./dev/sda1

Regular Expression

Substitution