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CertBus 2021 Newest RedHat EX200 RHCSA Exam VCE and PDF Dumps for Free Download!

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Question 1:

YUM repository has been provided at http://server.domain11.example.com/pub/x86_64/Server. Configure your system to use this location as a default repository.

Correct Answer: Check the anser in explanation.

vim/etc/yum.repos/base.repo [base] name=base baseurl= http://server.domain11.example.com/pub/x86_64/Server gpgcheck=0 enable=1 Save and Exit Use yum list for validation, the configuration is correct if list the package information. If the Yum configuration is not correct then maybe cannot answer the following questions.

Question 2:

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

Correct Answer: Check the anser in explanation.

# 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 8 I

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 3:

Configure NTP.

Configure NTP service, Synchronize the server time, NTP server: classroom.example.com

Correct Answer: Check the anser in 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 4:

Find the files owned by harry, and copy it to catalog: /opt/dir

Correct Answer: Check the anser in explanation.

# cd /opt/

# mkdir dir

# find / -user harry -exec cp -rfp {} /opt/dir/ \;

Question 5:

Configure autofs.

Configure the autofs automatically mount to the home directory of LDAP, as required:

server.domain11.example.com use NFS to share the home to your system. This file system contains a pre configured home directory of user ldapuserX.

Home directory of ldapuserX is:

server.domain11.example.com /home/guests/ldapuser

Home directory of ldapuserX should automatically mount to the ldapuserX of the local /home/guests Home directory’s write permissions must be available for users ldapuser1’s password is password

Correct Answer: Check the anser in explanation.

yum install -y autofs mkdir /home/rehome

/etc/auto.master /home/rehome/etc/auto.ldap Keep then exit cp /etc/auto.misc /etc/auto.ldap

/etc/auto.ldap ldapuserX -fstype=nfs,rw server.domain11.example.com:/home/guests/ Keep then exit systemctl start autofs systemctl enable autofs su – ldapuserX// test

If the above solutions cannot create files or the command prompt is -bash-4.2$, it maybe exist multi-level directory, this needs to change the server.domain11.example.com:/home/guests/ to server.domain11.example.com:/home/guests/ ldapuserX. What is multi-level directory? It means there is a directory of ldapuserX under the /home/guests/ldapuserX in the questions. This directory is the real directory.

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Question 6:

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

Question 7:

Create a logical volume

Create a new logical volume as required:

Name the logical volume as database, belongs to datastore of the volume group, size is 50 PE.

Expansion size of each volume in volume group datastore is 16MB.

Use ext3 to format this new logical volume, this logical volume should automatically mount to /mnt/database

Correct Answer: Check the anser in explanation.

fdisk -cu /dev/vda// Create a 1G partition, modified when needed partx –a /dev/vda pvcreate /dev/vdax vgcreate datastore /dev/vdax –s 16M lvcreate– l 50 –n database datastore mkfs.ext3 /dev/datastore/database mkdir /mnt/database mount /dev/datastore/database /mnt/database/ df –Th vi /etc/fstab /dev/datastore /database /mnt/database/ ext3 defaults 0 0 mount –a Restart and check all the questions requirements.

Question 8:

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 9:

Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).

Correct Answer: Check the anser in explanation.

if=/dev/zero of=/swapfile bs=1M count=600 mkswap /swapfile /etc/fstab: /swapfile swap swap defaults 0 0 mount -a

Question 10:

Open kmcrl value of 5 , and can verify in /proc/ cmdline

Correct Answer: Check the anser in explanation.

# vim /boot/grub/grub.conf kernel/vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/mapper/GLSvg-GLSrootrd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswaprd_NO_LUKSrd_NO_MDrd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet kmcrl=5 Restart to take effect and verification: # cat /proc/cmdline ro root=/dev/mapper/GLSvg-GLSroot rd_LVM_LV=GLSvg/GLSroot rd_LVM_LV=GLSvg/GLSswap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet kmcrl=5

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