CentOS: Security Admini­str­ation Cheat Sheet

Create a new groupgrou­padd
Delete a groupgrou­pdel
Modify the definition of a specified groupgrou­pmod
Create a new useruser­add
Delete a useruserdel
Modify a user accountuser­mod
Update a user’s passwordpasswd
Edit password, group, shadow­-pa­ssword (Updates etc/sh­adow)vipw
Edit password, group, shadow­-group (Updates etc/gs­hadow)vigr
Change password policychage

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