Test Online Free RedHat EX200 Exam Questions and Answers
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CORRECT TEXT
Create the following users, groups, and group memberships:
A group named adminuser.
A user natasha who belongs to adminuser as a secondary group A user harry who also belongs to adminuser as a secondary group.
A user sarah who does not have access to an interactive shell on the system, and who is not a member of adminuser, natasha, harry, and sarah should all have the password of redhat.
Answer: ✑ groupadd sysmgrs
✑ useradd -G sysmgrs Natasha
✑ We can verify the newly created user by cat /etc/passwd)
# useradd -G sysmgrs harry
# useradd -s /sbin/nologin sarrh
# passwd Natasha
# passwd harry
# passwd sarrah
Question 2Written Answer
CORRECT TEXT
Part 2 (on Node2 Server)
Task 6 [Implementing Advanced Storage Features]
Add a new disk to your virtual machine with a ize of 10 GiB
On this disk, create a VDO volume with a size of 50 GiB and mount it persistently on /vbread with xfs filesystem
Answer: *
[root@node2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vdd 252:48 0 5G 0 disk
vde 252:64 0 10G 0 disk
[root@node2 ~]# yum install kmod-kvdo vdo
[root@node2 ~]# systemctl enable --now vdo
[root@node2 ~]# systemctl start vdo
[root@node2 ~]# systemctl status vdo
[root@node2 ~]# vdo create --name=vdo1 --device=/dev/vde --vdoLogicalSize=50G [root@node2 ~]# vdostats --hu
Device Size Used Available Use% Space saving% /dev/mapper/vdo1 10.0G 4.0G 6.0G 40% N/A [root@node2 ~]# mkfs.xfs -K /dev/mapper/vdo1
*
[root@node2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vde 252:64 0 10G 0 disk
vdo1 253:4 0 50G 0 vdo
[root@node2 ~]# mkdir /vbread
[root@node2 ~]# blkid
/dev/mapper/vdo1: UUID="1ec7a341-6051-4aed-8a2c-4d2d61833227"
BLOCK_SIZE="4096" TYPE="xfs"
[root@node2 ~]# vim /etc/fstab
UUID=1ec7a341-6051-4aed-8a2c-4d2d61833227 /vbread xfs defaults,x-
systemd.requires=vdo.service 0 0
[root@node2 ~]# mount /dev/mapper/vdo1 /vbread/
[root@node2 ~]# df -hT
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/vdo1 xfs 50G 390M 50G 1% /vbread
Question 3Written Answer
CORRECT TEXT
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'.
Answer: ✑ 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 4Written Answer
CORRECT TEXT
Resize the logical volume vo and its filesystem to 290 MB. Make sure that the filesystem contents remain intact.
Note: Partitions are seldom exactly the same size requested, so a size within the range of 260 MB to 320 MiB is acceptable.
Answer: df -hT
lvextend -L +100M /dev/vg0/vo
lvscan
xfs_growfs /home/ // home is LVM mounted directory
Note: This step is only need to do in our practice environment, you do not need to do in the real exam
resize2fs /dev/vg0/vo // Use this comand to update in the real exam df -hT OR
e2fsck -f/dev/vg0/vo
umount /home
resize2fs /dev/vg0/vo required partition capacity such as 100M lvreduce -l 100M /dev/vg0/vo mount /dev/vg0/vo /home
df CHt
Question 5Written Answer
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: # 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
Question 6Written Answer
Configure a user account
Configure the user user2, which the user ID is 3388. The password for this user should be to be 123.
Answer: semanage port -a -t http_port_t -p tcp 82
ls -l /var/www/html/ -Z
semanage fcontext -m -t httpd_sys_content_t "/var/www/html/file1"
restorecon -v /var/www/html/file1
systemctl enable httpd
systemctl restart httpd
Question 8Written Answer
Find all the files or directories with Lucy as the owner, and copy to /tmp/findfiles directory.
Answer: (1) find /etc -size 10k -exec cp {} /tmp/findfiles \;
(2) find / -user lucy -exec cp -a {} /tmp/findfiles \;
Note: If find users and permissions, you need to use cp - a options, to keep file permissions and user attributes etc.
Question 9Written Answer
CORRECT TEXT
The user authentication has been provided by ldap domain in 192.168.0.254. According the following requirements to get ldapuser.
-LdapuserX must be able to login your system, X is your hostname number. But the ldapuser's home directory cannot be mounted, until you realize automatically mount by autofs server.
- All ldap user's password is "password".
Answer: system-config-authentication &
Question 10Written Answer
CORRECT TEXT
Upgrade the kernel, start the new kernel by default. kernel download from this address:
ftp://server1.domain10.example.com/pub/update/new.kernel
Answer: Download the new kernel file and then install it. [root@desktop8 Desktop]# ls kernel-2.6.32-71.7.1.el6.x86_64.rpm kernel-firmware-2.6.32-71.7.1.el6.noarch.rpm [root@desktop8 Desktop]# rpm -ivh kernel-*
Preparing... ###########################################
[100%]
1:kernel-firmware
########################################### [ 50%]
2:kernel
########################################### [100%]
Verify the grub.conf file, whether use the new kernel as the default boot. [root@desktop8 Desktop]# cat /boot/grub/grub.conf default=0
title Red Hat Enterprise Linux Server (2.6.32-71.7.1.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-71.7.1.el6.x86_64 ro root=/dev/mapper/vol0-root rd_LVM_LV=vol0/root rd_NO_LUKS rd_NO_MD
rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us crashkernel=auto rhgb quiet initrd /initramfs-2.6.32-71.7.1.el6.x86_64.img
Question 11Written Answer
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: 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 12Written Answer
In xxx.example.com perform the following tasks
Configure the network settings
Host name: xxx.example.com
IP address: 172.20.10.20
Subnet mask: 255.255.255.0
Gateway: 172.20.10.254
Name server: 172.20.10.254
Answer: nmcli con mod 'Wired connection 1' connection.autoconnect yes ipv4.method manual ipv4.addresses 172.20.10.20/24 ipv4.gateway 172.20.10.254 ipv4.dns 172.20.10.254
nmcli con up 'Wired connection 1'
Question 13Written Answer
CORRECT TEXT
Create a swap space, set the size is 600 MB, and make it be mounted automatically after rebooting the system (permanent mount).
Answer: ✑ if=/dev/zero of=/swapfile bs=1M count=600 mkswap /swapfile
/etc/fstab:
/swapfile swap swap defaults 0 0 mount -a
Question 14Written Answer
CORRECT TEXT
There is a local logical volumes in your system, named with shrink and belong to VGSRV volume group, mount to the /shrink directory. The definition of size is 320 MB.
Requirement:
Reduce the logical volume to 220 MB without any loss of data. The size is allowed between 200-260 MB after reducing.
Answer: cd;umount /shrink
e2fsck -f /dev/mapper/vgsrv-shrink
resize2fs /dev/mapper/vgsrv-shrink 220M
lvreduce -L 220M /dev/mapper/vgsrv-shrink
mount -a
Question 15Written Answer
CORRECT TEXT
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.
