^start of line
Group 1(/dev/[\S]+|zroot\S*?) 1st Alternative/dev/[\S]+ /dev/the literal text /dev/ (case sensitive) +matches at least one character from the set below:
\Sany character that is not Unicode whitespace
zrootthe literal text zroot (case sensitive) \S*?any character that is not Unicode whitespace, repeated any number of times
on the literal text on (case sensitive) /the literal / (4710 / 578 / 2F16)
.*any Unicode character (except for line terminators), repeated any number of times
the literal (3210 / 408 / 2016)
\(the literal ( (4010 / 508 / 2816)
Character Class[a-zA-Z0-9]+ +matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
A-Zone character from A (6510) to Z (9010) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
.+any Unicode character (except for line terminators), repeated at least once
.+any Unicode character (except for line terminators), repeated at least once
\)the literal ) (4110 / 518 / 2916)
$end of line
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