You are working as a Network Engineer.

Do the following steps as:

1.vi /etc/security/limits.conf

user1,user2-maxlogins1

@training-maxlogins5

2.vi /etc/pam.d/system-auth

sessionrequired/lib/security/pam_limits.so

To limit the number of process or number of logins, we should configure on /etc/security/limits.conf. First Columns contains the username separated by comma or @group name. Second column either hard or soft limits. Third columns called the item, maxloigns or nproc etc.

To identify the session of users we should call the pam_limits module in /etc/pam.d/system-auth.