[100% Success Factor] RedHat EX200 Question Answers 2020 | EX200 Exam Questions PDF

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RedHat RHCSA EX200 Practice Questions for Exam Preparation

For the purpose of practice, use EX200 to practice questions and add as much knowledge as possible. Practice will make you perfect in no time. You will do well in the exam.

QUESTION 1
The firewall must be open.
Correct Answer: Check the anser in explanation.
/etc/init.d/iptables start iptables -F iptables -X iptables -Z /etc/init.d/iptables save chkconfig iptables on


QUESTION 2
Configure iptables, there are two domains in the network, the address of local domain is 172.24.0.0/16 other domain is
172.25.0.0/16, now refuse domain 172.25.0.0/16 to access the server.
Correct Answer: Check the anser in explanation.
iptables -F service iptables save iptables -A INPUT -s 172.25.0.0/16 -j REJECT service iptables save service iptables restart


QUESTION 3
Locate all the files owned by ira and copy them to the / root/findresults directory.
Correct Answer: Check the anser in explanation.
# find / -user ira > /root/findresults (if /root/findfiles is a file) # mkdir -p /root/findresults # find / -user ira -exec cp -a {}
/root/findresults\; [ if /root/findfiles is a directory] ls /root/findresults


QUESTION 4
Add a new logical partition having size 100MB and create the data which will be the mount point for the new partition.
Correct Answer: Check the anser in explanation.
1.
Use fdisk /dev/hda-> To create new partition.
2.
Type n ->For New partitions
3.
It will ask for Logical or Primary Partitions. Press l for logical.
4.
It will ask for the Starting Cylinder: Use the Default by pressing Enter Keys
5.
Type the size: +100M you can specify either Last cylinder of size here.
6.
Press P to verify the partitions lists and remember the partitions name.
7.
Press w to write on partitions table.
8.
Either Reboot or use partprobe command.
9.
Use mkfs -t ext3 /dev/hda?
OR
1.
mke2fs -j /dev/hda? ->To create ext3 filesystem.
2.
vi /etc/fstab
3.
Write:
/dev/hda? /data ext3 defaults 0 0
4.
Verify by mounting on current sessions also:
mount /dev/hda? /data

QUESTION 5
Copy /etc/fstab to /var/tmp name admin, the user1 could read, write and modify it, while user2 without any permission.
Correct Answer: Check the anser in explanation.
# cp /etc/fstab /var/tmp/ # chgrp admin /var/tmp/fstab # setfacl -m u:user1:rwx /var/tmp/fstab # setfacl -m u:user2:—
/var/tmp/fstab # ls -l -rw-rw-r–+ 1 root admin 685 Nov 10 15:29 /var/tmp/fstab

QUESTION 6
Find all lines in the file /usr/share/dict/words that contain the string seismic. Put a copy of all these lines in their original
order in the file /root/wordlist. /root/wordlist should contain no empty lines and all lines must be exact copies of the
original lines in /usr/share/dict/words.
Correct Answer: Check the anser in explanation.
grep seismic /usr/share/dict/words> /root/wordlist


QUESTION 7
Configure autofs to automount the home directories of LDAP users as follows:
host.domain11.example.com NFS-exports /home to your system.
This filesystem contains a pre-configured home directory for the user ldapuser11 ldapuser11\\’s home directory is
host.domain11.example.com /rhome/ldapuser11 ldapuser11\\’s home directory should be automounted locally beneath
/rhome
as /rhome/ldapuser11
Home directories must be writable by their users
ldapuser11\\’s password is \\’password\\’.
Correct Answer: Check the anser in explanation.
vim /etc/auto.master /rhome /etc/auto.misc wq! # vim /etc/auto.misc ldapuser11 –rw,sync
host.domain11.example.com:/rhome/ldpauser11 :wq! #service autofs restart
service autofs reload
chkconfig autofs on
su -ldapuser11 Login ldapuser with home directory # exit


QUESTION 8
Your System is going use as a router for 172.24.0.0/16 and 172.25.0.0/16. Enable the IP Forwarding.
1.
echo “1” >/proc/sys/net/ipv4/ip_forward
2.
vi /etc/sysctl.conf net.ipv4.ip_forward=1
Correct Answer: Check the anser in explanation.
/proc is the virtual filesystem, containing the information about the running kernel.
To change the parameter of running kernel you should modify on /proc. From Next reboot the system, kernel will take
the value from /etc/sysctl.conf.


QUESTION 9
SELinux must run in force mode.
Correct Answer: Check the anser in explanation.
/etc/sysconfig/selinux SELINUX=enforcing


QUESTION 10
Add users: user2, user3.
The Additional group of the two users: user2, user3 is the admin group Password: redhat
Correct Answer: Check the anser in explanation.
# useradd -G admin user2 # useradd -G admin user3 # passwd user2 redhat # passwd user3 redhat


QUESTION 11
Configure autofs to make sure after login successfully, it has the home directory autofs, which is shared as
/rhome/ldapuser40 at the ip: 172.24.40.10. and it also requires that, other ldap users can use the home directory
normally.
Correct Answer: Check the anser in explanation.
# chkconfig autofs on # cd /etc/ # vim /etc/auto.master /rhome /etc/auto.ldap # cp auto.misc auto.ldap # vim auto.ladp
ldapuser40 -rw,soft,intr 172.24.40.10:/rhome/ldapuser40 * -rw,soft,intr 172.16.40.10:/rhome/and # service autofs stop #
server autofs start # showmount -e 172.24.40.10 # su – ladpuser40


QUESTION 12
Create a collaborative directory/home/admins with the following characteristics:
Group ownership of /home/admins is adminuser
The directory should be readable, writable, and accessible to members of adminuser, but not to any other user.
(It is understood that root has access to all files and directories on the system.)
Files created in /home/admins automatically have group ownership set to the adminuser group.
Correct Answer: Check the anser in explanation.
mkdir /home/admins chgrp -R adminuser /home/admins chmodg+w /home/admins chmodg+s /home/admins

QUESTION 13
Find the rows that contain abcde from file /etc/testfile, and write it to the file/tmp/testfile, and the sequence is requested
as the same as /etc/testfile.
Correct Answer: Check the anser in explanation.
# cat /etc/testfile | while read line; do echo $line | grep abcde | tee -a /tmp/testfile done OR grep `abcde\\’ /etc/testfile >
/tmp/testfile

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