fdisk -l     #grab info on disks
resize2fs     #resize a filesystem
lvreduce     #resize a logical volume
lvextend     #extend a logical volume

fdisk /dev/<disk>    #partition a disk. 

`g` in fdisk = gpt
`n` in fdisk = label
`t` in fdisk = type (lvm, swap, nfs)
`b` in fdisk = delete
`p` in fdisk = print change buffer without write
`w` in fdisk = write changes

findmnt --verify    #an /etc/fstab-scanning lifesaver