*Query the overall disk usage*
df -h
#Command extension
#df -a Display the usage of all file systems
#df -i Display inode information
#df -k The number of bytes displayed shows the block occupancy
#df -T Display the type of file system
*View directory structure*
#-L Specify the directory depth
tree -L 2 /home/
*Display all available block device information in a tree format*
lsblk
*List all available devices, Universal Unique Identifier (UUID), file system type and volume label*
blkid