Regular Expressions 101

^start of line

Group device(?<device>[^ ]+)

Negated Character Class[^ ]+

+matches at least one character outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

Group 2(\s+[^ ]+){4}

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

\s+any whitespace character, repeated at least once

Negated Character Class[^ ]+

+matches at least one character outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\s+any whitespace character, repeated at least once

Group disk(?<disk>\d+)

\d+a digit, repeated at least once

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

^(?<device>[^ ]+)(\s+[^ ]+){4}\s+(?<disk>\d+)

New

/dev/nvme4n1p1 xfs 50G 555M 50G 2% 25M 33K 25M 1% /var/www
/dev/mapper/group1-mountpoint_www xfs 9.0G 674M 8.4G 8% 4.5M 33K 4.5M 1% /var/www