Regular Expressions 101

^start of line

Negative Lookahead(?!(device01|device02|device03)$)

Group 1(device01|device02|device03)

1st Alternativedevice01

device01the literal text device01 (case sensitive)

2nd Alternativedevice02

device02the literal text device02 (case sensitive)

3rd Alternativedevice03

device03the literal text device03 (case sensitive)

$end of line

.*any character (except for line terminators), repeated any number of times

$end of line

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

^(?!(device01|device02|device03)$).*$

New

device01
device two
my device01
test device