USER AND SECURITY - 1

USER AND SECURITY INTERVIEW QUESTIONS AND ANSWERS

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1..What is user?

Linux is provided by users and groups. Each user is associated with a

unique positive integer called the user ID (uid). During login, the user provides a username and password to the login program. The uid 0 is associated with a special user known as root. The root user has special. privileges, and can do almost anything on the system

2..How to create  a user?

#  adduser  user_name

#  useradd  user_name

3..How to set the password for  the particular user?

#  passwd  user_name

4..How to change the group  password?

#  passwd   -g  group_name

5..How to lock the account?

#  passwd  -l user_name

or

usermod   -L user_name

6..How to unlock the user account?

#  passwd   -u user_name

Or

usermod   -U  user_name                        

7..How to delete  the particular user account?

#  userdel user_name

8..How to  set to expire the particular  user account?

#  chage  -E   30/12/2016   user_name

9..How to check the   aging of user  details?

#  chage  -l   user_name

10..How to  monitor the  users?

#  who