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Practice RedHat EX200 exam question 1-13
QUESTION 1
Create a volume group, and set 8M as a extends. Divided a volume group containing 50 extends on volume group lv
(lvshare), make it as ext4 file system, and mounted automatically under /mnt/data. And the size of the floating range
should set between 380M and 400M.
Correct Answer: Check the anser in explanation.
# fdisk # partprobe # pvcreate /dev/vda6 # vgcreate -s 8M vg1 /dev/vda6 -s # lvcreate -n lvshare -l 50 vg1 -l # mkfs.ext4
/dev/vg1/lvshare # mkdir -p /mnt/data # vim /etc/fstab /dev/vg1/lvshare /mnt/data ext4 defaults 0 0 # mount -a # df -h
QUESTION 2
There are two different networks 192.168.0.0/24 and 192.168.1.0/24. Where 192.168.0.254 and 192.168.1.254 IP
Address are assigned on Server. Verify your network settings by pinging 192.168.1.0/24 Network\\’s Host.
Correct Answer: Check the anser in explanation.
vi /etc/sysconfing/network NETWORKING=yes HOSTNAME=station?.example.com GATEWAY=192.168.0.254 service
network restart
2.vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ONBOOT=yes BOOTPROTO=static IPADDR=X.X.X.X
NETMASK=X.X.X.X GATEWAY=192.168.0.254 ifdown eth0 ifup eth0
QUESTION 3
Create a volume group, and set 16M as a extends. And divided a volume group containing 50 extends on volume group
lv, make it as ext4 file system, and mounted automatically under /mnt/data.
Correct Answer: Check the anser in explanation.
# pvcreate /dev/sda7 /dev/sda8 # vgcreate -s 16M vg1 /dev/sda7 /dev/sda8 # lvcreate -l 50 -n lvm02 # mkfs.ext4
/dev/vg1/lvm02 # blkid /dev/vg1/lv1 # vim /etc/fstab # mkdir -p /mnt/data UUID=xxxxxxxx /mnt/data ext4 defaults 0 0 #
vim /etc/fstab # mount -a # mount (Verify)
QUESTION 4
Configure the permissions of /var/tmp/fstab
Copy the file /etc/fstab to /var/tmp/fstab. Configure the permissions of /var/tmp/fstab so that:
the file /var/tmp/fstab is owned by the root user.
the file /var/tmp/fstab belongs to the group root.
the file /var/tmp/fstab should not be executable by anyone.
the user natasha is able to read and write /var/tmp/fstab.
the user harry can neither write nor read /var/tmp/fstab.
all other users (current or future) have the ability to read /var/tmp/fstab.
Correct Answer: Check the anser in explanation.
cp -a /etc/fstab /var/tmp
cd /var/tmp
ls -l
getfacl /var/tmp/fstab
chmod ugo-x /var/tmp/fstab
[ No need to do this, there won\\’t be execute permission for the file by default]
# setfacl -m u:natasha:rw /var/tmp/fstab # setfacl -m u:harry:0 /var/tmp/fstab(zero)
[Read permission will be there for all the users, by default. Check it using ls -l /var/tmp/fstab] Verify by [ ls -la
/var/tmp/fstab]
QUESTION 5
Configure your system so that it is an NTP client of server.domain11.example.com
Correct Answer: Check the anser in explanation.
#system-config-date Note: dialog box will open in that Check mark Synchronize date and time over network. Remove all
the NTP SERVER and click ADD and type server.domain11.example.com ****************And then press ENTER and
the press OK***************
QUESTION 6
Make on /archive directory that only the user owner and group owner member can fully access.
Correct Answer: Check the anser in explanation.
chmod 770 /archive
Verify using : ls -ld /archive Preview should be like: drwxrwx— 2 root sysuser 4096 Mar 16 18:08 /archive To change the
permission on directory we use the chmod command. According to the question that only the owner user (root) and
group member (sysuser) can fully access the directory so: chmod 770 /archive
QUESTION 7
Configure
your web services, download from http://instructor.example.com/pub/serverX.html And the services must be still running
after system rebooting.
Correct Answer: Check the anser in explanation.
cd /var/www/html wget http://instructor.example.com/pub/serverX.html mv serverX.html index.html /etc/init.d/httpd
restart chkconfig httpd on
QUESTION 8
There is a local logical volumes in your system, named with common and belong to VGSRV volume group, mount to the
/common directory. The definition of size is 128 MB.
Requirement:
Extend the logical volume to 190 MB without any loss of data. The size is allowed between 160-160 MB after
extending.
Correct Answer: Check the anser in explanation.
lvextend -L 190M /dev/mapper/vgsrv-common resize2fs /dev/mapper/vgsrv-common
QUESTION 9
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.
Correct Answer: Check the anser in 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 10
According the following requirements, configure autofs service and automatically mount to user\\’s home directory in the
ldap domain.
–
Instructor.example.com (192.168.0.254) has shared /home/guests/ldapuserX home directory to your system by over
NFS export, X is your hostname number.
–
LdapuserX\\’s home directory is exist in the instructor.example.com: /home/ guests/ldapuserX
–
LdapuserX’s home directory must be able to automatically mount to /home/ guests/ldapuserX in your system.
–
Home directory have write permissions for the corresponding user.
However, you can log on to the ldapuser1 – ldapuser99 users after verification. But you can only get your corresponding
ldapuser users. If your system\\’s hostname is server1.example.com, you can only get ldapuser1\\’s home directory.
Correct Answer: Check the anser in explanation.
mkdir –p /home/guests cat /etc/auto.master: /home/guests /etc/auto.ldap cat /etc/auto.ldap: ldapuser1 -rw
instructor.example.com:/home/guests/ldapuser1
automatically mount all the user\\’s home directory #* -rw instructor.example.com:/home/guests/and
QUESTION 11
Configure a task: plan to run echo “file” command at 14:23 every day.
Correct Answer: Check the anser in explanation.
(a) Created as administrator # crontab -u natasha -e 23 14 * * * /bin/echo “file” (b)Created as natasha # su – natasha $
crontab -e 23 14 * * * /bin/echo “file”
QUESTION 12
Change the logical volume capacity named vo from 190M to 300M. and the size of the floating range should set
between 280 and 320. (This logical volume has been mounted in advance.)
Correct Answer: Check the anser in explanation.
# vgdisplay (Check the capacity of vg, if the capacity is not enough, need to create pv , vgextend , lvextend) # lvdisplay
(Check lv) # lvextend -L +110M /dev/vg2/lv2 # resize2fs /dev/vg2/lv2 mount -a (Verify)
(Decrease lvm) # umount /media # fsck -f /dev/vg2/lv2 # resize2fs -f /dev/vg2/lv2 100M # lvreduce -L 100M /dev/vg2/lv2
# mount -a # lvdisplay (Verify) OR # e2fsck -f /dev/vg1/lvm02 # resize2fs -f /dev/vg1/lvm02 # mount /dev/vg1/lvm01 /mnt
# lvreduce -L 1G -n /dev/vg1/lvm02 # lvdisplay (Verify)
QUESTION 13
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.
Correct Answer: Check the anser in explanation.
# cd /home/ # mkdir admins / # chown .admin admins/ # chmod 770 admins/ # chmod g+s admins/
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