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The Red Hat Certified System Administrator (RHCSA) certification exam is a valuable credential for IT professionals looking to advance their careers in system administration. The EX200 exam is a practical and hands-on assessment of the candidate's skills, testing their ability to configure, manage, and troubleshoot various aspects of a Linux system. Red Hat Certified System Administrator - RHCSA certification is recognized globally and is highly respected in the industry, making it a valuable asset for any IT professional. Candidates should invest time and effort in their preparation for the exam to ensure they have the skills and knowledge necessary to pass.
NEW QUESTION # 76
Upgrade the kernel, start the new kernel by default. kernel download from this address:
ftp://server1.domain10.example.com/pub/update/new.kernel
Answer:
Explanation:
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
NEW QUESTION # 77
Update the kernel from ftp://instructor.example.com/pub/updates.
According the following requirements:
The updated kernel must exist as default kernel after rebooting the system.
The original kernel still exists and is available in the system.
Answer:
Explanation:
rpm -ivh kernel-firm...
rpm -ivh kernel...
NEW QUESTION # 78
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
Answer:
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
NEW QUESTION # 79
SIMULATION
Search files.
Find out files owned by jack, and copy them to directory /root/findresults
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation: mkdir/root/findfiles
find / -user jack -exec cp -a {} /root/findfiles/ \; ls /root/findresults
NEW QUESTION # 80
What statement is true regarding the Swarm service created by the following command?
docker service create --name myweb --network webnet --mode global nginx
- A. It runs exactly once on each node in a Swarm.
- B. It runs on all nodes which provide the network webnet.
- C. It runs exactly one time in the Swarm and cannot be scaled.
- D. It runs only on those nodes which support the network type global.
- E. It runs on one node by default and can be scaled to an arbitrary number of replicas.
Answer: E
Explanation:
Explanation/Reference:
NEW QUESTION # 81
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:
Explanation:
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
NEW QUESTION # 82
Configure a HTTP server, which can be accessed through http://station.domain40.example.com.
Please download the released page from http://ip/dir/example.html.
Answer:
Explanation:
# yum install -y httpd
# chkconfig httpd on
# cd /var/www/html
# wget http://ip/dir/example.html
# cp example.com index.html
# vim /etc/httpd/conf/httpd.conf
NameVirtualHost 192.168.0.254:80
<VirtualHost 192.168.0.254:80>
DocumentRoot /var/www/html/
ServerName station.domain40.example.com
</VirtualHost>
NEW QUESTION # 83
Create one partitions having size 100MB and mount it on data.
Answer:
Explanation:
1. Use fdisk /dev/hda to create new partition.
2. Type n For New partitions.
3. It will ask for Logical or Primary Partitions. Press l for logical.
4. It will ask for the Starting Cylinder: Use the Default by pressing Enter Key.
5. Type the Size: +100M you can specify either Last cylinder of size here.
6. Press P to verify the partitions lists and remember the partitions name.
7. Press w to write on partitions table.
8. Either Reboot or use partprobe command.
9. Use mkfs -t ext3 /dev/hda?
OR
mke2fs -j /dev/hda? To create ext3 filesystem.
vi /etc/fstab
Write:
/dev/hda? /data ext3 defaults 1 2
Verify by mounting on current Sessions also: mount /dev/hda? /data
NEW QUESTION # 84
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.
Answer:
Explanation:
see explanation below.
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
NEW QUESTION # 85
SIMULATION
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.
Answer:
Explanation:
See explanation below.
Explanation/Reference:
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
NEW QUESTION # 86
Add 3 users: harry, natasha, tom.
The requirements: The Additional group of the two users: harry, Natasha is the admin group. The user:
tom's login shell should be non-interactive.
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
# useradd -G admin harry
# useradd -G admin natasha
# useradd -s /sbin/nologin tom
# id harry;id Natasha (Show additional group)
# cat /etc/passwd
(Show the login shell)
OR
# system-config-users
NEW QUESTION # 87
SIMULATION
Configure your Host Name, IP Address, Gateway and DNS.
Host name: dtop5.dn.ws.com
IP Address: 172.28.10.5/4
Gateway: 172.28.10.1
DNS: 172.28.10.1
Answer:
Explanation:
See explanation below.
Explanation/Reference:
Explanation:
1. Configure Host Name
vim /etc/sysconfig/network NETWORKING=yes HOSTNAME=dtop5.dn.ws.com GATEWAY=172.28.10.1
2. Configure IP Address, Gateway and DNS
Configure the network by Network Manager:
Note: Please remember to choose two options:
Connect automatically
Available to all users
Click "Apply", save and exit, and restart your network services:
# Service network restart
3. Validate these profiles:
a) Check gateway: # vim / etc / sysconfig / network
NETWORKING=yes
HOSTNAME=dtop5.dn.ws.com
GATEWAY=172.28.10.1
b) Check Host Name: # vim /etc/hosts
c) Check DNS: # vim /etc/resolv.conf
# Generated by NetworkManager
Search dn.ws.com
Nameserver 172.28.10.1
d) Check Gateway: # vim /etc/sysconfig/network-scripts/ifcfg-eth0
NEW QUESTION # 88
Configure the system synchronous as 172.24.40.10.
Answer:
Explanation:
Answer see in the explanation.
Explanation/Reference:
Graphical Interfaces:
System-->Administration-->Date & Time
OR
# system-config-date
NEW QUESTION # 89
Please open the ip_forward, and take effect permanently.
Answer:
Explanation:
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
NEW QUESTION # 90
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
Answer:
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.
NEW QUESTION # 91
CORRECT TEXT
Configure the system synchronous as 172.24.40.10.
Answer:
Explanation:
Graphical Interfaces:
System-->Administration-->Date & Time
OR
# system-config-date
NEW QUESTION # 92
/data Directory is shared from the server1.example.com server. Mount the shared directory that:
- A. when user try to access, automatically should mount
- B. shared directory should mount on /mnt/data on your machine.
- C. when user doesn't use mounted directory should unmount automatically after 50 seconds.
Answer: A
Explanation:
1. vi /etc/auto.master
/mnt /etc /auto.misc --timeout=50
vi /etc/auto.misc
data -rw,soft,intr server1.example.com:/data
service autofs restart
chkconfig autofs on
When you mount the other filesystem, you should unmount the mounted filesystem, Automount feature of linux helps to mount at access time and after certain seconds, when user unaccess the mounted directory, automatically unmount the filesystem.
/etc/auto.master is the master configuration file for autofs service. When you start the service, it reads the mount point as defined in /etc/auto.master.
NEW QUESTION # 93
Part 2 (on Node2 Server)
Task 5 [Managing Logical Volumes]
Add an additional swap partition of 656 MiB to your system. The swap partition should automatically mount when your system boots Do not remove or otherwise alter any existing swap partition on your system
Answer:
Explanation:
* [root@node2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vdc 252:32 0 5G 0 disk
└─vdc1 252:33 0 4.1G 0 part
└─datavg-datalv 253:3 0 3.9G 0 lvm /data
vdd 252:48 0 5G 0 disk
vde 252:64 0 10G 0 disk
[root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1548 -2
[root@node2 ~]# free -m
total used free shared buff/cache available
Mem: 1816 1078 104 13 633 573
Swap: 2047 1 2046
[root@node2 ~]# parted /dev/vdc print
Number Start End Size Type File system Flags
1 1049kB 4404MB 4403MB primary lvm
* [root@node2 ~]# parted /dev/vdc mkpart primary linux-swap 4404MiB 5060MiB
[root@node2 ~]# mkswap /dev/vdc2
Setting up swapspace version 1, size = 656 MiB (687861760 bytes)
no label, UUID=9faf818f-f070-4416-82b2-21a41988a9a7
[root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1804 -2
[root@node2 ~]# swapon /dev/vdc2
* [root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1804 -2
/dev/vdc2 partition 671740 0 -3
[root@node2 ~]# blkid
/dev/vdc2: UUID="9faf818f-f070-4416-82b2-21a41988a9a7" TYPE="swap" PARTUUID="0f22a35f-02"
[root@node2 ~]# vim /etc/fstab
UUID=9faf818f-f070-4416-82b2-21a41988a9a7 swap swap defaults 0 0
[root@node2 ~]# reboot
[root@node2 ~]# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 1804 -2
/dev/vdc2 partition 671740 0 -3
NEW QUESTION # 94
Part 2 (on Node2 Server)
Task 8 [Tuning System Performance]
Set your server to use the recommended tuned profile
Answer:
Explanation:
[root@node2 ~]# tuned-adm list
[root@node2 ~]# tuned-adm active
Current active profile: virtual-guest
[root@node2 ~]# tuned-adm recommend
virtual-guest
[root@node2 ~]# tuned-adm profile virtual-guest
[root@node2 ~]# tuned-adm active
Current active profile: virtual-guest
[root@node2 ~]# reboot
[root@node2 ~]# tuned-adm active
Current active profile: virtual-guest
NEW QUESTION # 95
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
Answer:
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.
NEW QUESTION # 96
......
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