Red Hat Red Hat Certifications EX200 Questions & Answers

• Question 131:

  Part 1 (on Node1 Server)

  Task 5 [Controlling Access to Files with ACLs]

  Copy the file /etc/fstab to /var/tmp. Configure the following permissions on /var/tmp/fstab.

  The file /var/tmp/fstab is owned by root user

  The file /var/tmp/fstab is belongs to the root group

  The file /var/tmp/fstab should be executable by anyone

  The user harry is able to read and write on /var/tmp/fstab

  The user natasha can neither read or write on /var/tmp/fstab

  All other users (Current or future) have the ability to read /var/tmp/fstab

  Correct Answer: Check the anser in explanation.

  * [root@node1 ~]# cp -p /etc/fstab /var/tmp/ [root@node1 ~]# ls -lrt /etc/fstab [root@node1 ~]# ls -lrt /var/tmp/fstab [root@node1 ~]# chmod a+x /var/tmp/fstab [root@node1 ~]# getfacl /var/tmp/fstab [root@node1 ~]# setfacl -m u:harry:rw- /var/tmp/fstab [root@node1 ~]# setfacl -m u:natasha:--- /var/tmp/fstab [root@node1 ~]# getfacl /var/tmp/fstab getfacl: Removing leading '/' from absolute path names # file: var/tmp/fstab # owner: root # group: root user::rwx user:harry:rwuser:natasha:--group::r-x mask::rwx other::r-x

  * [root@node1 ~]# su - natasha [natasha@node1 ~]$ cat /var/tmp/fstab cat: /var/tmp/fstab: Permission denied

• Question 132:

  Part 1 (on Node1 Server)

  Task 12 [Accessing Network-Attached Storage]

  Configure autofs to automount the home directories of user remoteuserX. Note the following:

  utility.domain15.example.com(172.25.15.9), NFS-exports /netdir to your system, where user is remoteuserX where X is your domain number

  remoteuserX home directory is utility.domain15.example.com:/netdir/remoteuserX

  remoteuserX home directory should be auto mounted locally at /netdir as /netdir/remoteuserX

  Home directories must be writable by their users while you are able to login as any of the remoteuserX only home directory that is accessible from your system

  Correct Answer: Check the anser in explanation.

  * [root@host ~]#systemctl enable sssd.service [root@host ~]#systemctl start sssg.service [root@host ~]#getent passwd remoteuser15 [root@host ~]#yum install autofs [root@host ~]#vim /etc/auto.master.d/home9.autofs /netdir/remoteuser15 /etc/auto.home9 [root@host ~]#vim /etc/auto.home9 remoteuser15 –rw,sync utility.network15.example.com:/netdir/remoteuser15/and [root@host ~]#systemctl enable autofs [root@host ~]#systemctl restart autofs [root@host ~]#su - remoteuser15

• Question 133:

  Part 1 (on Node1 Server)

  Task 1 [Managing Networking]

  Please create new network connection with existing interface (enp1s0) using provided values:

  IPv4: 172.25.X.10/255.255.255.0 (where X is your domain number: Domain15)

  Gateway: 172.25.X.2

  DNS server: 172.25.X.2

  Add the following secondary IP addresses statically to your current running connection. Do this in a way that does not compromise your existing settings:

  IPv4: 10.0.0.5/24 and set the hostname node1.domain15.example.com

  Correct Answer: Check the anser in explanation.

  * [root@node1 ~]# nmcli connection show [root@node1 ~]# nmcli connection add con-name static ifname enp1s0 type ethernet ipv4.addresses 172.25.15.10/24 ipv4.gateway 172.25.15.2 ipv4.dns 172.25.15.2 [root@node1 ~]# nmcli connection modify static ipv4.method manual connection.autoconnect yes [root@node1 ~]# nmcli connection modify static +ipv4.addresses 10.0.0.5/24 [root@node1 ~]# nmcli connection up static [root@node1 ~]# nmcli connection show [root@node1 ~]# hostnamectl set-hostname node1.domain15.example.com [root@node1 ~]# hostnamectl status [root@node1 ~]# nmcli connection down static

  * [root@node1 ~]# nmcli connection up static [root@node1 ~]# ip addr show [root@node1 ~]# reboot ### For checking ### [root@node1 ~]# ip addr show [root@node1 ~]# netstat -nr [root@node1 ~]# cat /etc/resolv.conf

• Question 134:

  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.

  * [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