I have recently started using Linux and would love to know how to interpret the output from the lsblk -f command.

More specifically, I would like to know the different partitions and sizes.

• For instance, I understand that ext4 and xfs are different file systems in unix. But the entire picture has a tree structure. So I was wondering if the total number of partitions is 4, i.e.,sda1, sda2, sda3 and sdb.
• If so, then what are the sub-partitions (root, swap, home and var)?
• Also, is lvm2_member a filesystem too?
• Where do I get the size of each of these partitions?

I have recently started using Linux and would love to know how to interpret the output from the lsblk -f command.

More specifically, I would like to know the different partitions and sizes.

• For instance, I understand that ext4 and xfs are different file systems in unix. But the entire picture has a tree structure. So I was wondering if the total number of partitions is 4, i.e.,sda1, sda2, sda3 and sdb.
• If so, then what are the sub-partitions (root, swap, home and var)?
• Also, is lvm2_member a filesystem too?

NAME            FSTYPE      LABEL MOUNTPOINT   SIZE
sda                                            1.1T
├─sda1                                           2M
├─sda2          xfs               /boot          2G
└─sda3          LVM2_member                    1.1T
  ├─centos-root ext4              /            200G
  ├─centos-swap swap              [SWAP]       128G
  ├─centos-var  ext4              /var          10G
  └─centos-home ext4              /home        777G
sdb             ext4        data  /data       81.9T
loop1           squashfs                     487.5M