# 5.0 Users, Groups and Passwords

### Topics 
- User, group and password files
- Adding users
- Modifying users
- Setting passwords
- Adding groups
- Adding groups to users
- Password mangement

### Reading List
Chapter
- 7

### Commands
|Command|Action|
|:-|:-|
|id|Shows user information|
|ps -au|process information per user|
|passwd|change user password|
|useradd|Add users|
|usermod|Modify users|
|userdel|Delete users|
|groupadd|Add a group|
|groupmod|Modify a group|
|groupdel|Delete a group|
|date|show the date|
|chage|Change ageing of passwords|

### Chage Overview
[![chage-1.png](../images/scaled-840-0/chage-1.png)](../images/chage-1.png)

### Config Files
|File|Config|
|:-|:-|
|/etc/passwd|Holds all users and their information|
|/etc/group|Holds all group information|
|/etc/shadow|Holds user passwords in hashes|