LFCS / tasks
0/5 completed — do these live in your VM, then check them off.
1. On /dev/sdb: one partition, format xfs, mount at /data persistently by UUID.
2. /dev/sdc: PV → VG data_vg → 4G LV data_lv, ext4, persistent mount /mnt/data.
3. Grow data_lv by 2G including its filesystem, while mounted.
4. Add a 1 GB swapfile at /swapfile, enable now, persist.
5. LUKS-encrypt /dev/sdd, open as 'secure', ext4, mount /mnt/vault.