Session 10 18th oct |LDAP client and configure it using SSSD, Postfix how to configure

Topics:

What is LDAP Client and how do we configure it using SSSD.
What is Postfix ? How to configure the same.
How to use tail command to see the logs?
Usage of head command.
Usage of history
How to kill process if needed.
Assigning advanced files permissions i.e. SUID, SGID and Sticky bit.
Basic elements of Fire Wall vs IP Tables.