File system operations:
1. Use dfthe command to view the capacity of the disk
2. Use duthe command to view the capacity of the directory
Disk management:
dd: Copy a file in blocks of the specified size, and perform the specified conversion while copying.
if(input file, input file) and of(output file, output file)
Simple understanding: if specifies the source file of specifies the destination file
Learning dd is the master of dd for the file system. Example: Detailed explanation of dd command under Linux and the meaning of dd if=/dev/zero of=_dd if=/dev/zero of=/dev/sda_win9zz's Blog-CSDN Blog
Check directly when using the disk management practice
Be careful with disk management and it will crash!