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NEW QUESTION # 15
You are new System Administrator and from now you are going to handle the system and your main task is Network monitoring, Backup and Restore. But you don't know the root password. Change the root password to redhat and login in default Runlevel.
Answer:
Explanation:
When you Boot the System, it starts on default Runlevel specified in /etc/inittab:
Id:?:initdefault:
When System Successfully boot, it will ask for username and password. But you don't know the root's password. To change the root password you need to boot the system into single user mode. You can pass the kernel arguments from the boot loader.
1. Restart the System.
2. You will get the boot loader GRUB screen.
3. Press a and type 1 or s for single mode ro root=LABEL=/ rhgb queit s
4. System will boot on Single User mode.
5. Use passwd command to change.
6. Press ctrl+d
NEW QUESTION # 16
CORRECT TEXT
Find the rows that contain abcde from file /etc/testfile, and write it to the file/tmp/testfile, and the sequence is requested as the same as /etc/testfile.
Answer:
Explanation:
# cat /etc/testfile | while read line;
do
echo $line | grep abcde | tee -a /tmp/testfile
done
OR
grep `abcde' /etc/testfile > /tmp/testfile
NEW QUESTION # 17
Configure /var/tmp/fstab Permission.
Copy the file /etc/fstab to /var/tmp/fstab. Configure var/tmp/fstab permissions as the following:
Owner of the file /var/tmp/fstab is Root, belongs to group root
File /var/tmp/fstab cannot be executed by any user
User natasha can read and write /var/tmp/fstab
User harry cannot read and write /var/tmp/fstab
All other users (present and future) can read var/tmp/fstab.
Answer:
Explanation:
see explanation below.
Explanation
cp /etc/fstab /var/tmp/
* /var/tmp/fstab view the owner setfacl -m u:natasha:rw- /var/tmp/fstab setfacl -m u:haryy:---
/var/tmp/fstab
Use getfacl /var/tmp/fstab to view permissions
NEW QUESTION # 18
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 dat
a. The size is allowed between 160-160 MB after extending.
Answer:
Explanation:
lvextend -L 190M /dev/mapper/vgsrv-common resize2fs /dev/mapper/vgsrv-common
NEW QUESTION # 19
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 one time in the Swarm and cannot be scaled.
- B. It runs on one node by default and can be scaled to an arbitrary number of replicas.
- C. It runs only on those nodes which support the network type global.
- D. It runs on all nodes which provide the network webnet.
- E. It runs exactly once on each node in a Swarm.
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION # 20
You are new System Administrator and from now you are going to handle the system and your main task is Network monitoring, Backup and Restore. But you don't know the root password. Change the root password to redhat and login in default Runlevel.
Answer:
Explanation:
see explanation below.
Explanation
When you Boot the System, it starts on default Runlevel specified in /etc/inittab:
Id:?:initdefault:
When System Successfully boot, it will ask for username and password. But you don't know the root's password. To change the root password you need to boot the system into single user mode. You can pass the kernel arguments from the boot loader.
1. Restart the System.
2. You will get the boot loader GRUB screen.
3. Press a and type 1 or s for single mode ro root=LABEL=/ rhgb queit s
4. System will boot on Single User mode.
5. Use passwd command to change.
6. Press ctrl+d
NEW QUESTION # 21
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 # 22
Notes:
NFS: NFS instructor.example.com:/var/ftp/pub/rhel6/dvd
YUM: http://instructor.example.com/pub/rhel6/dvd
ldap: http://instructor.example.com/pub/EXAMPLE-CA-CERT
- A. Install dialog package.
Answer: A
NEW QUESTION # 23
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.
Answer:
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/&
NEW QUESTION # 24
SIMULATION
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:
See explanation below.
Explanation/Reference:
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 # 25
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:
see explanation below.
Explanation
# 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 # 26
Create a Shared Directory.
Create a shared directory /home/admins, make it has the following characteristics:
/home/admins belongs to group adminuser
This directory can be read and written by members of group adminuser Any files created in /home/ admin, group automatically set as adminuser.
Answer:
Explanation:
see explanation below.
Explanation
mkdir /home/admins
chgrp -R adminuser /home/admins
chmodg+w /home/admins
chmodg+s /home/admins
NEW QUESTION # 27
You have a domain named www.rhce.com associated IP address is 192.100.0.2. Configure the Apache web server by implementing the SSL for encryption communication.
Answer:
Explanation:
vi /etc/httpd/conf.d/ssl.conf <VirtualHost 192.100.0.2> ServerName www.rhce.com DocumentRoot /var/www/rhce DirectoryIndex index.html index.htm ServerAdmin [email protected] SSLEngine on SSLCertificateFile /etc/httpd/conf/ssl.crt/server.crt SSLCertificateKeyFile /etc/httpd/conf/ssl.key/server.key </VirtualHost> cd /etc/httpd/conf
3 make testcert
Create the directory and index page on specified path. (Index page can download from ftp://server1.example.com at exam time) service httpd start|restart chkconfig httpd on Apache can provide encrypted communications using SSL (Secure Socket Layer). To make use of encrypted communication, a client must request to https protocol, which is uses port 443. For HTTPS protocol required the certificate file and key file.
NEW QUESTION # 28
Create one partitions having size 100MB and mount it on data.
Answer:
Explanation:
see explanation below.
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 # 29
Which of the log messages below matches the following Logstash grok filter?
grok {
match => ["message", "%{SYSLOGBASE} new node %{IPORHOST:node}" ]
}
- A. Jun 30 00:36:49 headnode clustermanager[12353]: new node 198.51.100.103
- B. Jun 30 00:36:49 headnode:
new node 198.51.100.103 at clustermanager:12353 - C. %{SYSLOG-FROM:headnode clustermanager[12353]} new node 198.51.100.103
- D. clustermanager[12353]: Jun 30 00:36:49 headnode new node 198.51.100.103
- E. Jun 30 00:36:49 headnode clustermanager[198.51.100.103]: new node
Answer: E
NEW QUESTION # 30
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.
Answer:
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
NEW QUESTION # 31
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:
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 # 32
CORRECT TEXT
Add user: user1, set uid=601
Password: redhat
The user's login shell should be non-interactive.
Answer:
Explanation:
# useradd -u 601 -s /sbin/nologin user1
# passwd user1
redhat
NEW QUESTION # 33
A YUM source has been provided in the
http://instructor.example.com/pub/rhel6/dvd
Configure your system and can be used normally.
Answer:
Explanation:
/etc/yum.repos.d/base.repo
[base]
name=base
baseurl=http://instructor.example.com/pub/rhel6/dvd
gpgcheck=0
yum list
NEW QUESTION # 34
Which section of the Prometheus configuration defines which nodes are monitored?
- A. listener
- B. targets
- C. scrape_config
- D. rules
- E. nodes
Answer: C
Explanation:
Explanation/Reference: https://prometheus.io/docs/prometheus/latest/getting_star
NEW QUESTION # 35
......
The Red Hat Certified System Administrator (RHCSA) certification exam, also known as RedHat EX200, is a performance-based exam that tests the skills and knowledge required to manage and administer Red Hat Enterprise Linux (RHEL) systems. Red Hat Certified System Administrator - RHCSA certification is designed for IT professionals who want to demonstrate their proficiency in managing Linux systems and are looking to advance their career in the field of Linux administration.
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