centos7 usesyum install httpdto install the Apache service. The user is apache.
Should the website directory be given owner permissions likechown -R apache:apache?
But in order to facilitate testers to switch branches for feature testing, the testers are given the apache account and password. But what is the apache password?
Software automatically installed

Server A: use www

[root@fl ~]#cat /etc/passwd | grep apache apache:x:48:48:Apache:/usr/share/httpd:/sbin/nologin

Server B: using nginx

[root@iZ~]# cat /etc/passwd | grep www www:x:501:501::/home/www:/bin/bash

1. What do the numbers 48 and 501 mean?
2. When installing the website, do I have to give the designated user permissions ofchown -R?
3. Can the passwords of www and apache be modified?