RHCSA Study Questions With Complete
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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
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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
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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
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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
Answers
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
, RHCSA Study Questions With Complete
Answers
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
, RHCSA Study Questions With Complete
Answers
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
, RHCSA Study Questions With Complete
Answers
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
