RH302 Exam
Improve Red Hat RH302 - An Overview 51 to 60
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2021 Mar RH302 exam
Q51. CORRECT TEXT
Whoever creates the file on /data make automatically owner group should be the group owner of /data directory.
Answer and Explanation:
When user creates the file/directory, user owner will be user itself and group owner will be the primary group of the user.
There is one Special Permission SGID , when you set the SGID bit on directory,When users creates the file/directory automatically owner group will be same as a parent.
1. chmod g+s /data
2. Verify using: ls -ld /data
You will get: drwxrws---
Q52. CORRECT TEXT
One Logical Volume named lv1 is created under vg0. The Initial Size of that Logical Volume is 100MB. Now you required the size 500MB. Make successfully the size of that Logical Volume 500M without losing any data. As well as size should be increased online.
Answer and Explanation:
The LVM system organizes hard disks into Logical Volume (LV) groups. Essentially, physical hard disk partitions (or possibly RAID arrays) are set up in a bunch of equal-sized chunks known as Physical Extents (PE). As there are several other concepts associated with the LVM system, let's start with some basic definitions:
* Physical Volume (PV) is the standard partition that you add to the LVM mix. Normally, a physical volume is a standard primary or logical partition. It can also be a RAID array.
* Physical Extent (PE) is a chunk of disk space. Every PV is divided into a number of equal sized PEs. Every PE in a LV group is the same size. Different LV groups can have different sized PEs.
* Logical Extent (LE) is also a chunk of disk space. Every LE is mapped to a specific PE.
* Logical Volume (LV) is composed of a group of LEs. You can mount a filesystem such as /home and /var on an LV.
* Volume Group (VG) is composed of a group of LVs. It is the organizational group for LVM. Most of the commands that you'll use apply to a specific VG.
1. Verify the size of Logical Volume: lvdisplay /dev/vg0/lv1
2. Verify the Size on mounted directory: df -h or df -h mounted directory name
3. Use : lvextend -L+400M /dev/vg0/lv1
4. resize2fs /dev/vg0/lv1 à to bring extended size online.
5. Again Verify using lvdisplay and df -h command.
Q53. CORRECT TEXT
Install the Redhat Linux RHEL 5 through NFS. Where your Server is server1.example.com having IP 172.24.254.254 and shared /var/ftp/pub. The size of the partitions are listed below:
/ à 1048
/home à 1028
/boot à 512
/var à 1028
/usr à 2048
Swap -> 1.5 of RAM Size
/document à configure the RAID Level 0 of remaining all free space.
After completing the installation through NFS solve the following questions. There are two networks 172.24.0.0/16 and 172.25.0.0/16. As well as there are two domains example.com on 172.24.0.0/16 network and cracker.org on 172.25.0.0/16 network. Your system is based on example.com domain. SELinux Must be on enforcing mode.
Answer and Explanation:
1. Insert the CD on CD-ROM and start the system.
2. In Boot: Prompt type linux askmethod
3. It will display the language, keyboard selection.
4. It will ask you for the installation method.
5. Select the NFS Image from the list
6. It will ask the IP Address, Net mask, Gateway and Name Server. Select Use
Dynamic IP Configuration: because DHCP Server will be configured in your exam lab.
7. It will ask for the NFS Server Name and Redhat Enterprise Linux Directory.
Specify the NFS Server: 172.24.254.254
Directory: /var/ftp/pub
8. After Connecting to the NFS Server Installation start in GUI. Go up to the partition screen by selecting the different Options.
9. Create the partition According to the Question because Size and what-what partition should you create at installation time is specified in your question
10. Create the two RAID partitions having equal size of remaining all free space.
11. Click on RAID button
12. Type mount point /document
13. Select RAID Level 0
14. Click on ok
15. Then select the MBR Options, time zone and go upto package selections.
It is another Most Important Time of installation. Due to the time limit, you should care about the installation packages. At Exam time you these packages are enough.
X-Window System
GNOME Desktop
(these two packages are generally not required)
Administration Tools.
System Tools
Windows File Server
FTP Servers
Mail Servers
Web Servers
Network Servers
Editors
Text Based Internet
Server Configuration Tools
Printing Supports
When installation will complete, your system will reboot. Jump for another Question.
Q54. CORRECT TEXT
There is a server having 172.24.254.254 and 172.25.254.254. Your System lies on 172.24.0.0/16.
Make successfully ping to 172.25.254.254 by Assigning following IP: 172.24.0.x Where x is your station number.
Answer and Explanation:
1. vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=x.x.x.x
NETMASK=x.x.x.x
2. Enter the IP Address as given station number by your examiner: example: 172.24.0.1
3. Enter Subnet Mask
4. Enter Default Gateway and primary name server
5. press on ok
6. ifdown eth0
7. ifup eth0
8. verify using ifconfig
In the lab server is playing the role of router, IP forwarding is enabled. Just set the Correct IP and gateway, you can ping to 172.25.254.254.
Q55. CORRECT TEXT
Now a days you are observing that your system being very slow. You observe the processes that one user named user1 running more than 50 processes. Configure to limit the number of processes that user1 couldn't run more than 7 process.
Answer and Explanation:
1. vi /etc/security/limits.conf
user1 hard nproc 7
2. vi /etc/pam.d/system-auth
session required /lib/security/pam_limits.so
To limit the number of process or number of logins, we should configure on /etc/security/limits.conf. First Columns contains the username separated by comma or @group name. Second column either hard or soft limits. Third columns called the item, maxloigns or nproc etc.
To identify the session of users we should call the pam_limits module in /etc/pam.d/system-auth.
Latest RH302 latest exam:
Q56. CORRECT TEXT
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 ?
Answer and Explanation:
By Default system accept the logs only generated from local host. To accept the Log from other host configure:
3. 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 recieved with -r
4. service syslog restart
Q57. CORRECT TEXT
Make Successfully Resolve to server1.example.com where DNS Server is 192.168.0.254.
Answer and Explanation:
1. vi /etc/resolv.conf
Write: nameserver 192.168.0.254
Q58. CORRECT TEXT
One New Kernel is released named kernel-hugemem. Kernel is available on ftp://server1.example.com under pub directory for anonymous. Install the Kernel and make previous new kernel is default to boot System.
Answer and Explanation:
2. rpm -ivh ftp://server1.example.com/pub/kernel-hugemem-*
2. vi /etc/grub.conf
Set the default to new kernel
default=0
Example of /etc/grub.conf
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Red Hat Enterprise Linux ES (2.6.9-5.ELhugemem)
root (hd0,0)
kernel /vmlinuz-2.6.9-5.ELhugemem ro root=LABEL=/1 rhgb quiet
initrd /initrd-2.6.9-5.ELhugemem.img
title Red Hat Enterprise Linux ES (2.6.9-5.EL)
root (hd0,0)
kernel /vmlinuz-2.6.9-5.EL ro root=LABEL=/1 rhgb quiet
initrd /initrd-2.6.9-5.EL.img
rpm command is used to install, update and remove the rpm package. -ivh option is install, verbose, and display the hash mark.
Q59. CORRECT TEXT
One NIS Domain named rhce.com is configured in your lab, server is 192.168.0.254. rhce100, rhce200,rhce300 user are created on domain server.
Make your system as a member of rhce.com domain. Make sure that when nis user login in your system home directory should get by them. Home directory is separately shared on server eg /home/stationx/ where x is you station number.
Answer and Explanation:
1. use the authconfig --nisserver=192.168.0.254 --nisdomain=rhce.com --update or system-configauthentication
2. Click on Enable NIS
3. Type the NIS Domain: rhce.com
4. Type Server 192.168.0.254 then click on next and ok
5. You will get a ok message.
6. vi /etc/auto.master and write at the end of file
/home/stationx /etc/auto.home --timeout=60
7. vi /etc/auto.home and write
* -rw,soft,intr 192.168.0.254:/home/stationx/&
Note: please specify your station number in the place of x.
8. Service autofs restart
9. Login as the rhce1 or rhce2 or rhce3 on another terminal will be Success.
According to question, rhce.com domain is already configured. We have to make a client of rhce.com domain and automatically mount the home directory on every client. To make a member of domain, we use the autheconfig or system-config-authentication command. There a are lots of authentication server i.e NIS, LDAB, SMB etc. NIS is a RPC related Services, no need to configure the DNS, we should specify the NIS server address.
Here Automount feature is available. When user tried to login, home directory will automatically mount. The automount service reads the configuration from /etc/auto.master file.
On /etc/auto.master file we specified the mount point the configuration file for mount point.
Q60. CORRECT TEXT
You Completely Install the Redhat Enterprise Linux ES 4 on your System. While start the system,
it's giving error to load X window System. How will you fix that problem and make boot successfully run X Window System.
Answer and Explanation:
Think while Problems occurred on booting System on Runlevel 5 (X Window)./tmp is full or notQuota is already reachedVideo card or resolution or monitor is misconfigured.xfs service is running or not.
Do These:
1. df -h /tmp à/tmp is full remove the unnecessary filequota username àif quota is already reached remove unnecessary file from home directory.Boot the System in runlevel 3.àyou can pass the Kernel Argument from boot loader.Use command: system-config-display à It will display a dialog to configure the monitor, Video card, resolution etc.Set the Default Runlevel 5 in /etc/inittab id:5:initdefault:
6. Reboot the System you will get the GUI login Screen.