Check the hard disk usage.
To check the Linux hard disk information, use the "df command". The df command is used to set the hard disk's Used space Free space Percentage of usage The df command displays the following information In Linux, hard disks are treated as special files called device files. IDE drives have the names /dev/hda (primary star hard disk), /dev/hdb (primary slave hard disk), etc. on Linux systems. The results of the df command will also show the names of these files, so you can distinguish between them and check their usage even if you are using multiple hard disks.