linuxexpert-practice-labs/labs/lpic-1/102-1-disk-layout/README.md

LPIC-1 102.1: Designing a disk layout

Building LVM on a spare disk, growing a logical volume and its filesystem in one step, and adding a swap file.

Before you start

The lab adds an empty 2 GiB spare disk, /dev/loop40. It comes back at every boot, before filesystems are mounted. Before you start, look at the VM's own layout with lsblk -f and findmnt, and work out why each filesystem is where it is.

Tasks

1. On /dev/loop40, make a physical volume, a volume group vg_lab and a 1 GiB logical volume lv_data, and put a filesystem on it. Then grow the logical volume and its filesystem by 500 MiB in one step with lvextend -r.
2. Add a 512 MiB swap file, turn it on, and check it with swapon --show.

Hints

• pvcreate, vgcreate, lvcreate -n lv_data -L 1G vg_lab, mkfs.ext4 or mkfs.xfs; lvs, lsblk -f.
• lvextend -r -L +500M. XFS grows only while it's mounted; ext4 grows either way.
• fallocate -l 512M (or dd), chmod 600, mkswap, swapon; a line in /etc/fstab keeps it on after a reboot.