What Should I know About The RHCSA Exam
Add 3 users: harry, natasha, tom. The requirements: The Additional group of the two users: harry, Natasha is the admin group. The user: tom’s login shell should be non-interactive.
The question is based On The User & Group Management In The RHCSA, 8 Course on this website. If you have gone through this course, solving this wouldn’t be a problem.
1. Verify if the group admin exist, if it doesn’t exist, create the group
In my lab, it doesn’t exist, so, to create the admin group, use the command,
[root@lab02 ~]# groupadd admin
[root@lab02 ~]#[root@lab02 ~]# cat /etc/group |grep admin
printadmin:x:995:
admin:x:1013:
[root@lab02 ~]#
2. Add the users, harry and Natasha first.
[root@lab02 ~]# useradd -G admin harry
[root@lab02 ~]#[root@lab02 ~]# useradd -G admin Natasha
[root@lab02 ~]#3. verify that the users are added to the admin group
[root@lab02 ~]# id harry
uid=1011(harry) gid=1014(harry) groups=1014(harry),1013(admin)[root@lab02 ~]# id Natasha
uid=1012(Natasha) gid=1015(Natasha) groups=1015(Natasha),1013(admin)
[root@lab02 ~]#
4. create the user tom with a non interactive shell
[root@lab02 ~]# useradd -s /sbin/nologin/ tom
[root@lab02 ~]#5. Verify the user, tom’s shell
[root@lab02 ~]# cat /etc/passwd |grep tom
tom:x:1013:1016::/home/tom:/sbin/nologin/
[root@lab02 ~]#if you try to login with the user, tom. you will be denied because there is no login shell for tom
groupadd admin
cat /etc/group |grep admin
useradd -G admin harry
useradd -G admin Natasha
id harry
id Natasha
useradd -s /sbin/nologin/ tom
cat /etc/passwd |grep tom
You can also watch the Video on RHCSA 8 Exam Practice Question 1 by clicking the link below.
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Impressed
if you add tom with the below command;
[root@lab02 ~]# useradd -s /sbin/nologin/ tom
you will get this error below
Password:
su: failed to execute /sbin/nologin/: Not a directory
correct comma is [root@lab02 ~]# ‘useradd -s /sbin/nologin tom’ without the / after nologin coz it makes it a directory and not a shell
When you use tab completion, it’s most likely it add /, and that shouldn’t even be a problem. I wouldn’t know why your system is throwing that error, what Linux distribution and version are you using. Well, the most important thing is that you were able to get pass it and do what works for you. That’s the spirit. Great!!!
To create users harry and natasha:
useradd harry && useradd natasha
To add harry and natasha to the admin group:
usermod -G admin natasha && usermod -G admin harry
To create tom as a non-interactive user:
useradd -s /sbin/nologin tom