Red Hat EX200 Online Practice Questions and Exam Preparation

Red Hat EX200 Online Questions & Answers

• Question 41:

  Copy /etc/fstab document to /var/TMP directory. According the following requirements to configure the permission of this document.

  1.

  The owner of this document must be root.

  2.

  This document belongs to root group.

  3.

  User mary have read and write permissions for this document.

  4.

  User alice have read and execute permissions for this document.

  5.

  Create user named bob, set uid is 1000. Bob have read and write permissions for this document.

  6.

  All users has read permission for this document in the system.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  cp /etc/fstab /var/tmp chown root:root /var/tmp/fstab chmod a-x /var/tmp/fstab setfacl –m u:mary:rw /var/tmp/fstab setfacl –m u:alice:rx /var/tmp/fstab useradd –u 1000 bob

• Question 42:

  You are a System administrator. Using Log files very easy to monitor the system. Now there are 50 servers running as Mail, Web, Proxy, DNS services etc. You want to centralize the logs from all servers into on LOG Server. How will you configure the LOG Server to accept logs from remote host?

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  By default, system accept the logs only generated from local host. To accept the Log from other host configure: vi /etc/sysconfig/syslog SYSLOGD_OPTIONS="-m 0 -r" Where -m 0 disables 'MARK' messages. -r enables logging from remote machines -x disables DNS lookups on messages received with -r service syslog restart

• Question 43:

  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.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

  ---

  # 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 44:

  Create a new logical volume according to the following requirements:

  The logical volume is named database and belongs to the datastore volume group and has a size of 50 extents.

  Logical volumes in the datastore volume group should have an extent size of 16 MB.

  Format the new logical volume with a ext3 filesystem.

  The logical volume should be automatically mounted under /mnt/database at system boot time.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

  ---

  fdisk -cu /dev/vda 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

• Question 45:

  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

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  * [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 46:

  Create a volume group, and set the size is 500M, the size of single PE is 16M. Create logical volume named lv0 in this volume group, set size is 20 PE, make it as ext3 file system, and mounted automatically under data.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

  ---

  fdisk /dev/vda pvcreate /dev/vda3 vgcreate –s 16M vg0 /dev/vda3 lvcreate –n lv0 –l 20 vg0 mkfs.ext3 /dev/mapper/vg0-lv0 mkdir /data /etc/fstab: /dev/mapper/vg0-lv0 /data ext3 defaults 0 0 mount –a mount | grep data

• Question 47:

  Please open the ip_forward, and take effect permanently.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  vim /etc/sysctl.conf net.ipv4.ip_forward = 1 sysctl –w (takes effect immediately) If no “sysctl.conf” option, use these commands: sysctl –a |grep net.ipv4 sysctl –P net.ipv4.ip_forward = 1 sysctl -w

• Question 48:

  Configure a cron Task.

  User natasha must configure a cron job, local time 14:23 runs and executes: */bin/echo hiya every day.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  crontab –e –u natasha 23 14/bin/echo hiya crontab -l -u natasha // view systemctlenable crond systemcdlrestart crond

• Question 49:

  Part 1 (on Node1 Server)

  Task 8 [Managing Local Users and Groups]

  Create a user fred with a user ID 3945. Give the password as iamredhatman

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  * [root@node1 ~]# useradd -u 3945 fred [root@node1 ~]# echo "iamredhatman" | passwd --stdin fred Changing password for user fred. passwd: all authentication tokens updated successfully

• Question 50:

  Create a user named alex, and the user id should be 1234, and the password should be alex111.

  Correct Answer. Check the anser in explanation.
  Check the anser in explanation.

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  # useradd -u 1234 alex # passwd alex alex111 alex111 OR echo alex111|passwd -stdin alex