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RedHat EX200 Exam Practice Questions (P. 2)

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Question #6
SIMULATION -
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:
See explanation below.
# cat /etc/testfile | while read line;
do
echo $line | grep abcde | tee -a /tmp/testfile
done

OR -
grep `abcde' /etc/testfile > /tmp/testfile

Question #7
SIMULATION -
Create a 2G swap partition which take effect automatically at boot-start, and it should not affect the original swap partition.

Correct Answer:
See explanation below.
# fdisk /dev/sda
p
(check Partition table)
n
(create new partition: press e to create extended partition, press p to create the main partition, and the extended partition is further divided into logical partitions)

Enter -
+2G
t
l

W -
partx -a /dev/sda
partprobe
mkswap /dev/sda8

Copy UUID -
swapon -a
vim /etc/fstab
UUID=XXXXX swap swap defaults 0 0
(swapon -s)

Question #8
SIMULATION -
Create a user named alex, and the user id should be 1234, and the password should be alex111.

Correct Answer:
See explanation below.
# useradd -u 1234 alex
# passwd alex
alex111
alex111

OR -
echo alex111|passwd -stdin alex
chatbot-img GPT-4o - Answer
To correctly answer the simulation question, the process involves multiple steps to ensure accuracies such as setting the user ID and the password separately since the useradd command alone won't set a user password directly. First, you should create the user by specifying the UID directly, 'useradd -u 1234 alex', then set the password in a subsequent step using the 'passwd alex' command. This approach allows you to meet the question's requirements correctly and ensures that all parameters are correctly applied, verified using commands like 'id alex'.

Question #9
SIMULATION -
Install a FTP server, and request to anonymous download from /var/ftp/pub catalog. (it needs you to configure yum direct to the already existing file server.)

Correct Answer:
See explanation below.
# cd /etc/yum.repos.d
# vim local.repo
[local]
name=local.repo
baseurl=file:///mnt
enabled=1
gpgcheck=0
# yum makecache
# yum install -y vsftpd
# service vsftpd restart
# chkconfig vsftpd on
# chkconfig --list vsftpd
# vim /etc/vsftpd/vsftpd.conf
anonymous_enable=YES

Question #10
SIMULATION -
Configure a HTTP server, which can be accessed through
http://station.domain40.example.com.
Please download the released page from http://ip/dir/example.html.

Correct Answer:
See explanation below.
# yum install -y httpd
# chkconfig httpd on
# cd /var/www/html
# wget http://ip/dir/example.html
# cp example.com index.html
# vim /etc/httpd/conf/httpd.conf
NameVirtualHost 192.168.0.254:80
<VirtualHost 192.168.0.254:80>
DocumentRoot /var/www/html/
ServerName station.domain40.example.com
</VirtualHost>

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