File System

Mounting Storage

• configuration file: /etc/fstab

• sudo mount -o remount,noexec,nosuid /tmp: remount /tmp with noexec, nosuid

Mount option

• noexec: prevent the execution of any executable files on that filesystem.

• nosuid: Do not allow set-user-identifier or set-group-identifier bits to take effect which means the executable always run as the user that run it, not the owner or group

Logical Volume

• List physical disk: fdisk -l

• List Physical Volume: pvdisplay

• List Volume Group: vgdisplay

• List Logical Volume: lvdisplay

• Check free space: df -h

Create new logical Volume

pvcreate /dev/sdb1
vgcreate newvg /dev/sdb1
lvcreate -L 50G -n datalv newvg
mkfs.xfs /dev/newvg/datalv
mkdir /mnt/data
mount /dev/newvg/datalv /mnt/data

# Make it persistent by adding to /etc/fstab
/dev/appvg/datalv /mnt/data xfs  defaults 0 0

Rename Logical volume

• lvrename appvg oldnamelv newnamelv

Extend Volume Group

• vgextend appvg /dev/sdb2

Extend Logical Volume

• lvextend -l +100%FREE /dev/appvg/home: extend /home logical volumne to use 100% of free space