Self prepare for REDHAT RHCSA EX200 Part 6: Manage users and groups

Part 6:  Manage users and groups

1) Create, delete, and modify local user accounts.

* maybe yum install system-config-users will do trick?

* getent passwd (list users)

* getent group  (list groups)

* useradd

* userdel

* usermod

2) Change passwords and adjust password aging for local user accounts.
* passwd or chage

* passwd user

* echo "joe1:passsword1234" | chpasswd

* passwd -x 30 joe1 (password will expire in 30 days)

* passwd -S joe1 (shows some info about user password)

* chage  -E "2013-05-05" joe4 (password for joe4 expire at 05/05/2013)

* chage  -l joe4 (list some info about joe4)

* or use 'chage username' and go on options

* passwd -l (lock) or -u (unlock), passwd --help or chage --help

3) Create, delete, and modify local groups and group memberships.
* groupadd
* groupdel
* groupmod
* groupmems

  TIP: use manual ;)

4) Configure a system to use an existing LDAP directory service for user and group information.
* yum -y install openldap-clients system-config-authentication nss-pam-ldapd

* then run: system-config-authentication

* or run authconfig-tui