Reveal volume group metadata and free space from the shell in seconds. 26.06.2026 | reading time: 2 min Want to know what a volume group contains and how much free space remains? Use `vgdisplay` to print the LVM metadata for one or all volume groups and learn exactly where you can grow a logical volume. Live example Run the command and read the key lines. ```bash\n$ sudo vgdisplay\n --- Volume group ---\n VG Name vg0\n Format lvm2\n VG Size 100.00 GiB\n PE Size 4.00 MiB\n Total PE 25599\n Alloc PE / Size 8192 / 32.00 GiB\n Free PE / Size 17407 / 68.00 GiB\n Cur LV 2\n Cur PV 1\n``` What to read first Look for VG Size, PE Size, Alloc PE and Free PE to decide if he can safely extend an LV; a short run `vgdisplay -s` gives a compact summary and `vgdisplay --units g` converts sizes to gigabytes for quick math. Practical uses Check `vgdisplay` before creating or extending logical volumes to avoid surprises, use it during troubleshooting when a PV went missing, and combine its output with `pvs` or `pvdisplay` to locate the physical storage behind the volume group. Next steps vgdisplay is a safe read-only inspector that gives immediate insight; practice interpreting its numbers, then try growing an LV on a non-production VM to see the workflow end-to-end, and consider studying for CompTIA Linux+ or LPIC-1 with intensive exam prep at bitsandbytes.academy to turn this knowledge into a certification. Join Bits & Bytes Academy First class LINUX exam preparation. storage filesystem utilities troubleshooting
