EX200 : Red Hat Certified System Administrator (RHCSA) 2024 Exam

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RedHat
EX200
Red Hat Certified System Administrator (RHCSA)
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Question: 126
CORRECT TEXT
Create a catalog under /home named admins. Its respective group is requested to be the admin group. The group users
could read and write, while other users are not allowed to access it. The files created by users from the same group
should also be the admin group.
Answer: see explanation below.
Explanation
# cd /home/
# mkdir admins /
# chown .admin admins/
# chmod 770 admins/
# chmod g+s admins/
Question: 127
CORRECT TEXT
Create a user named alex, and the user id should be 1234, and the password should be alex111.
Answer: see explanation below.
Explanation
# useradd -u 1234 alex
# passwd alex
alex111
alex111
OR
echo alex111|passwd -stdin alex
Question: 128
CORRECT TEXT
Create a Shared Directory.
Create a shared directory /home/admins, make it has the following characteristics:
/home/admins belongs to group adminuser
This directory can be read and written by members of group adminuser Any files created in /home/ admin, group
automatically set as adminuser.
Answer: see explanation below.
Explanation
mkdir /home/admins
chgrp -R adminuser /home/admins
chmodg+w /home/admins
chmodg+s /home/admins
Question: 129
CORRECT TEXT
Configure a user account.
Create a user iar ， uid is 3400. Password is redhat
Answer: see explanation below.
Explanation
useradd -u 3400 iar
passwd iar
Question: 130
CORRECT TEXT
Create User Account.
Create the following user, group and group membership:
Adminuser group
User natasha, using adminuser as a sub group
User Harry, also using adminuser as a sub group
User sarah, can not access the SHELL which is interactive in the system, and is not a member of adminuser, natasha
， harry ， sarah password is redhat.
Answer: see explanation below.
Explanation
groupadd adminuser
useradd natasha -G adminuser
useradd haryy -G adminuser
useradd sarah -s /sbin/nologin
Passwd user name // to modify password or echo redhat | passwd –stdin user name id natasha // to view user group.
Question: 131
CORRECT TEXT
Configure the verification mode of your host account and the password as LDAP. And it can login successfully
through ldapuser40. The password is set as "password". And the certificate can be downloaded from
http://ip/dir/ldap.crt. After the user logs on the user has no host directory unless you configure the autofs in the
following questions.
Answer: see explanation below.
Explanation
system-config-authentication
LDAP Server: ldap//instructor.example.com (In domain form, not write IP)
OR
# yum groupinstall directory-client (1.krb5-workstation 2.pam-krb5 3.sssd)
# system-config-authentication
Question: 132
CORRECT TEXT
Configure a default software repository for your system.
One YUM has already provided to configure your system on http://server.domain11.example.com/pub/ x86_64/Server,
and can be used normally.
Answer: see explanation below.
Explanation
Yum-config-manager –add-repo=http://content.example.com/rhel7.0/x86-64/dvd†is to generate a file vim
content.example.com_rhel7.0_x86_64_dvd.repo, Add a line gpgcheck=0
Yumcleanall
Yumrepolist
Almost 4305 packages are right, Wrong Yum Configuration will lead to some following questions cannot be worked
out.
Question: 133
CORRECT TEXT
Binding to an external validation server.
System server.domain11.example.com provides a LDAP validation service, your system should bind to this service as
required:
Base DN of validation service is dc=example,dc=com
LDAP is used for providing account information and validation information Connecting and using the certification of
http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to encrypt
After the correct configuration, ldapuser1 can log into your system, it does not have HOME directory until you finish
autofs questions, ldapuser1 password is password.
Answer: see explanation below.
Explanation
yum -y install sssd authconfig-gtk krb5-workstation authconfig-gtk // open the graphical interface
Modify user account database to ldap, fill up DN and LDAP SERVER as questions required, use TLS to encrypt
connections making tick, write http://server.domain11.example.com/pub/EXAMPLE-CA-CERT to download ca,
authentication method choose ldap password.
You can test if the ldapuser is added by the following command:
Id ldapuser1
Note: user password doesn’t not need to set
Question: 134
CORRECT TEXT
Adjust the size of the Logical Volume.
Adjust the size of the vo Logical Volume, its file system size should be 290M. Make sure that the content of this
system is complete.
Note: the partition size is rarely accurate to the same size as required, so in the range 270M to 320M is acceptable.
Answer: see explanation below.
Explanation
Addition
df -hT
lvextend -L +100M /dev/vg0/vo
Lvscan
xfs_growfs /home/ //home is the mounted directory of the LVM, this step just need to do in the practice environment,
and test EXT4 does not need this step.
resize2fs /dev/vg0/vo// use this command to update in examination.
df -hT
OR
Subtraction
e2fsck -f/dev/vg0/vo
umount /home
resize2fs /dev/vg0/vo // the final required partition capacity is 100M lvreduce -l 100M /dev/vg0/vo
mount /dev/vg0/vo/home
df -hT
Question: 135
CORRECT TEXT
Configure NTP.
Configure NTP service, Synchronize the server time, NTP server: classroom.example.com
Answer: see explanation below.
Explanation
Configure the client:
Yum -y install chrony
Vim /etc/chrony.conf
Add: server classroom.example.com iburst
Start: systemctl enable chronyd
systemctl restart chronyd
Validate: timedatectl status
Question: 136
CORRECT TEXT
Search a String
Find out all the columns that contains the string seismic within /usr/share/dict/words, then copy all these columns to
/root/lines.tx in original order, there is no blank line, all columns must be the accurate copy of the original columns.
Answer: see explanation below.
Explanation
grep seismic /usr/share/dict/words> /root/lines.txt
Question: 137
CORRECT TEXT
Download ftp://192.168.0.254/pub/boot.iso to /root, and mounted automatically under /media/cdrom and which take
effect automatically at boot-start.
Answer: see explanation below.
Explanation
# cd /root; wget ftp://192.168.0.254/pub/boot.iso
# mkdir -p /media/cdrom
# vim /etc/fstab
/root/boot.iso /media/cdrom iso9660 defaults,loop 0 0
# mount -a
mount [-t vfstype] [-o options] device dir

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