lvm VGrename and lvrename in linux


vgrename VG_ESM6c VG
Volume group "VG_ESM6c" successfully renamed to "VG"

lvrename /dev/VG/root lv_root
Renamed "root" to "lv_root" in volume group "VG" 



then edit /etc/fstab
then edit /boot/grub/grub*cfg
then make a new kernel: mkinitrd --force /boot/initramfs-$(uname -r).img $(uname -r)