RHCSA Study Questions | Questions And Answers Latest {2024- 2025} A+ Graded | 100%
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List the order of the layers involved in the LVM architecture - 1. Physical Volume(PV)
2. Volume Group(VG)
3. Logical Volume(LV)
What do you need to do before you create a physical volume? - You need to create a partition marked
as the LVM partition type. In fdisk or gdisk you need to press t to change the partition type. MBR disk is
8e, GUID is 8300
What command verifies the physical volumes that were created? - pvs
What command shows details about the physical volume? - pvdisplay
What command gives a hierarchical overview of which disks and partitions are in the LVM volume
groups and logical volumes? - lsblk
How do you create a volume of the first partition of the the sdb disk? You want to call the volume
vgdata. - vgcreate vgdata /dev/sdb1
Give the two commands that will allow you to see the volume group - vgs - Shows a summary of
available volume groups
vgdisplay - Shows a detailed list of volume groups and their properties
Show the command you would use to create a logical volume of half the physical volume vgdata. Name
the logical volume lvvol01 - lvcreate -n lvvol01 -l 50%FREE vgdata
Show the command you would use to remove the logical volume lvvol01. That logical volume resides in
the physical volume vgdata. - lvremove /dev/vgdata/lvvol01
,Show the command you would use to create a logical volume of 500 megabyte in the physical volume
vgdata. Name the logical volume lvvol01 - lvcreate -n lvvol01 -L 500M vgdata
Show the commands you would use to show the logical volumes - lvs - Shows a summary of all available
logical volumes
lvdisplay - Shows a detailed list of available logical volumes and their properties
What would the name of the LV called lvvol01 in the Physical Volume vgdata be called the the device
mapper name? - /dev/mapper/vgdata-lvvol01
If you want to make an XFS file system out of the logical volume lvvol01 in the PV vgdata, what is the
command? - mkfs.xfs /dev/vgdata/lvvol01
If you want to make an EXT4 file system out of the logical volume lvvol01 in the PV vgdata, what is the
command? - mkfs.ext4 /dev/vgdata/lvvol01
What file systems can only be increased and what file systems can be increased and reduced? - XFS - can
only be increased
EXT4 - can be increased and decreased
Btrfs - can be increased and decreased
If you are going to reduce an EXT4 file system, what state must it be in? - You can only reduce the
volume when it is offline
I want to add 250 megabytes to the file system /dev/vgdata/lvvol01. Show the command - lvresize -L
+250M -r /dev/vgdata/lvvol01
I want to reduce the EXT4 file system by 250 megabytes. The LV is lvvol01, VG is vgdata and the mount
point is /files - 1. umount /files
2. lvreduce -L -250M -r /dev/vgdata/lvvol01
I want to resize the LV to 75 percent of the Volume group. The LV is lvvol01, VG is vgdata and the mount
point is /files - lvresize -r -l 75%VG /dev/vgdata/lvvol01
,I want to reduce the logical volume to 750 MB. LV is lvvol01 and VG is vgdata. Show the command you
would use - lvreduce -r -l 750M /dev/vgdata/lvvol01
I want to remove the physical volume /dev/sdb2 out of the volume group vgdata, show the command
you would use - vgredeuce vgdata /dev/sdb2
Which command shows the current version of RHEL you are using?
a. uname -r
b. cat /proc/rhel-version
c. cat /etc/redhat-release
d. uname -k - C
[root@client ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
Which command enables you to find the actual version of the kernel that is
used?
a. uname -r
b. uname -v
c. procinfo -k
d. procinfo -l - A
[root@client ~]# uname -r
3.10.0-957.12.2.el7.x86_64
What is the name of the process that helps the kernel initializing hardware
devices properly?
a. systemd-udevd
b. hwinit
c. udev
, d. udevd -
Where does your system find the default rules that are used for initializing
new hardware devices?
a. /etc/udev/rules.d
b. /usr/lib/udev/rules.d
c. /usr/lib/udev.d/rules
d. /etc/udev.d/rules - A
/etc/udev/rules.d
Which command should you use to unload a kernel module, including all of
its dependencies?
a. rmmod
b. insmod -r
c. modprobe -r
d. modprobe - c
modprobe -r
Which command enables you to see whether the appropriate kernel modules
have been loaded for hardware in your server?
a. lsmod
b. modprobe -l
c. lspci -k
d. lspci -
Where do you specify a kernel module parameter to make it persistent?
a. /etc/modules.conf
Verified
List the order of the layers involved in the LVM architecture - 1. Physical Volume(PV)
2. Volume Group(VG)
3. Logical Volume(LV)
What do you need to do before you create a physical volume? - You need to create a partition marked
as the LVM partition type. In fdisk or gdisk you need to press t to change the partition type. MBR disk is
8e, GUID is 8300
What command verifies the physical volumes that were created? - pvs
What command shows details about the physical volume? - pvdisplay
What command gives a hierarchical overview of which disks and partitions are in the LVM volume
groups and logical volumes? - lsblk
How do you create a volume of the first partition of the the sdb disk? You want to call the volume
vgdata. - vgcreate vgdata /dev/sdb1
Give the two commands that will allow you to see the volume group - vgs - Shows a summary of
available volume groups
vgdisplay - Shows a detailed list of volume groups and their properties
Show the command you would use to create a logical volume of half the physical volume vgdata. Name
the logical volume lvvol01 - lvcreate -n lvvol01 -l 50%FREE vgdata
Show the command you would use to remove the logical volume lvvol01. That logical volume resides in
the physical volume vgdata. - lvremove /dev/vgdata/lvvol01
,Show the command you would use to create a logical volume of 500 megabyte in the physical volume
vgdata. Name the logical volume lvvol01 - lvcreate -n lvvol01 -L 500M vgdata
Show the commands you would use to show the logical volumes - lvs - Shows a summary of all available
logical volumes
lvdisplay - Shows a detailed list of available logical volumes and their properties
What would the name of the LV called lvvol01 in the Physical Volume vgdata be called the the device
mapper name? - /dev/mapper/vgdata-lvvol01
If you want to make an XFS file system out of the logical volume lvvol01 in the PV vgdata, what is the
command? - mkfs.xfs /dev/vgdata/lvvol01
If you want to make an EXT4 file system out of the logical volume lvvol01 in the PV vgdata, what is the
command? - mkfs.ext4 /dev/vgdata/lvvol01
What file systems can only be increased and what file systems can be increased and reduced? - XFS - can
only be increased
EXT4 - can be increased and decreased
Btrfs - can be increased and decreased
If you are going to reduce an EXT4 file system, what state must it be in? - You can only reduce the
volume when it is offline
I want to add 250 megabytes to the file system /dev/vgdata/lvvol01. Show the command - lvresize -L
+250M -r /dev/vgdata/lvvol01
I want to reduce the EXT4 file system by 250 megabytes. The LV is lvvol01, VG is vgdata and the mount
point is /files - 1. umount /files
2. lvreduce -L -250M -r /dev/vgdata/lvvol01
I want to resize the LV to 75 percent of the Volume group. The LV is lvvol01, VG is vgdata and the mount
point is /files - lvresize -r -l 75%VG /dev/vgdata/lvvol01
,I want to reduce the logical volume to 750 MB. LV is lvvol01 and VG is vgdata. Show the command you
would use - lvreduce -r -l 750M /dev/vgdata/lvvol01
I want to remove the physical volume /dev/sdb2 out of the volume group vgdata, show the command
you would use - vgredeuce vgdata /dev/sdb2
Which command shows the current version of RHEL you are using?
a. uname -r
b. cat /proc/rhel-version
c. cat /etc/redhat-release
d. uname -k - C
[root@client ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
Which command enables you to find the actual version of the kernel that is
used?
a. uname -r
b. uname -v
c. procinfo -k
d. procinfo -l - A
[root@client ~]# uname -r
3.10.0-957.12.2.el7.x86_64
What is the name of the process that helps the kernel initializing hardware
devices properly?
a. systemd-udevd
b. hwinit
c. udev
, d. udevd -
Where does your system find the default rules that are used for initializing
new hardware devices?
a. /etc/udev/rules.d
b. /usr/lib/udev/rules.d
c. /usr/lib/udev.d/rules
d. /etc/udev.d/rules - A
/etc/udev/rules.d
Which command should you use to unload a kernel module, including all of
its dependencies?
a. rmmod
b. insmod -r
c. modprobe -r
d. modprobe - c
modprobe -r
Which command enables you to see whether the appropriate kernel modules
have been loaded for hardware in your server?
a. lsmod
b. modprobe -l
c. lspci -k
d. lspci -
Where do you specify a kernel module parameter to make it persistent?
a. /etc/modules.conf
