Show LVM physical volumes linux
List LVM physical volumes with space usage
pvs && pvdisplay
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Show LVM volume groups
vgs && vgdisplay
Show LVM logical volumes
lvs -o +devices
Extend LV and resize FS
lvextend -L +10G /dev/vg0/lv_data && resize2fs /dev/vg0/lv_data
Create swap file
fallocate -l 2G /swapfile && chmod 600 /swapfile && mkswap /swapfile && swapon /swapfile
Show swap usage
swapon --show && free -h