regex101: apt list --installed

^start of string

Group 1(.*?)

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

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(.*?)

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

,nowthe literal text ,now (case sensitive)

\sa Unicode whitespace character

Group 3(.*?)

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

\sa Unicode whitespace character

Group 4(.*?)

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

\sa Unicode whitespace character

Global pattern flags

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

Search reference

Regular Expression

^(.*?)/(.*?),now\s(.*?)\s(.*?)\s

New

usbmuxd/kali-rolling,now 1.1.0-2+b1 amd64 [installed,automatic]
usbutils/kali-rolling,now 1:007-4 amd64 [installed]
util-linux/kali-rolling,now 2.28-6 amd64 [installed]
uuid-runtime/kali-rolling,now 2.28-6 amd64 [installed,automatic]
va-driver-all/kali-rolling,now 1.7.1-2 amd64 [installed,automatic]
vboot-kernel-utils/kali-rolling,now 0~R52-8350.B-1 amd64 [installed,automatic]
vboot-utils/kali-rolling,now 0~R52-8350.B-1 amd64 [installed,automatic]
vdpau-driver-all/kali-rolling,now 1.1.1-3 amd64 [installed,automatic]

Regular Expressions 101

Regular Expression

Extraction