RHEL | User, Group and Password

User Management

Add new user

useradd

Create a user and set the primary group to something else 

sudo useradd -G consultants consultant3

Delete User

userdel johndoe1

Append group to user

usermod -aG sudo myusername

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Group Management

Add new group

groupadd

Delete Group

groupdel groupname

Create a new group called consultants with a GID of 35000. (-g is id)

groupadd -g 35000 consultants

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Password Management

Change the default max password age

sudo vim /etc/login.defs

Require a new password every 15 days (-M is max days)

chage -M 15 username

Require user to change password on first login (-d )

chage -d 0 username

Change to password date expiry

chage -E 2023-01-27 username

Edit password configs

/etc/login.defs