linux-helpers.md

check the process of ip without lsof

ss - ltnup 'sport = :4003'

to check linux distribution

cat /etc/os-release

for alpine linux

use apk for package management use openrc for service management https://www.cyberciti.biz/faq/how-to-enable-and-start-services-on-alpine-linux/

user group management

list all user groups getent group also available in cat /etc/passwd

user to process mapping :

ps u 1

group management

groups // lists groups groups