Improve disk docs

Author: lumarel

docs/operatingsystem/disk.md

@@ -2,34 +2,42 @@
 
 ## Extend virtual disk lvm -> xfs
 
-- `echo 1 > /sys/block/sda/device/rescan`
-- `growpart /dev/sda 3`
-- `pvresize /dev/sda3`
-- `lvextend -l +100%FREE /dev/mapper/lvmvol-root`
-- `xfs_growfs /`
+```sh
+echo 1 > /sys/block/sda/device/rescan
+growpart /dev/sda 3
+pvresize /dev/sda3
+lvextend -l +100%FREE /dev/mapper/lvmvol-root
+xfs_growfs /
+```
 
 ## Extend virtual disk lvm -> ext4
 
-- `echo 1 > /sys/block/sda/device/rescan`
-- `growpart /dev/sda 3`
-- `pvresize /dev/sda3`
-- `lvextend -l +100%FREE /dev/mapper/lvmvol-root`
-- `resize2fs /dev/mapper/lvmvol-root`
+```sh
+echo 1 > /sys/block/sda/device/rescan
+growpart /dev/sda 3
+pvresize /dev/sda3
+lvextend -l +100%FREE /dev/mapper/lvmvol-root
+resize2fs /dev/mapper/lvmvol-root
+```
 
 ## Extend virtual disk lvm -> btrfs
 
-- `echo 1 > /sys/block/sda/device/rescan`
-- `growpart /dev/sda 3`
-- `pvresize /dev/sda3`
-- `lvextend -l +100%FREE /dev/mapper/lvmvol-root`
-- `btrfs filesystem resize max /`
+```sh
+echo 1 > /sys/block/sda/device/rescan
+growpart /dev/sda 3
+pvresize /dev/sda3
+lvextend -l +100%FREE /dev/mapper/lvmvol-root
+btrfs filesystem resize max /
+```
 
 ## Extend virtual disk lvm -> swap
 
-- `echo 1 > /sys/block/sda/device/rescan`
-- `growpart /dev/sda 3`
-- `pvresize /dev/sda3`
-- `lvextend -l +100%FREE /dev/mapper/lvmvol-swap`
-- `swapoff /dev/mapper/lvmvol-swap`
-- `mkswap /dev/mapper/lvmvol-swap`
-- `swapon /dev/mapper/lvmvol-swap`
+```sh
+echo 1 > /sys/block/sda/device/rescan
+growpart /dev/sda 3
+pvresize /dev/sda3
+lvextend -l +100%FREE /dev/mapper/lvmvol-swap
+swapoff /dev/mapper/lvmvol-swap
+mkswap /dev/mapper/lvmvol-swap
+swapon /dev/mapper/lvmvol-swap
+```