View the help instructions of df command

View the help instructions of df command

To view the help instructions of df, you can use man df , you can also use df --help and whatis df.

whatis: Used to query what function a command performs and print the query results to the terminal.

man: According to the system design help directory, each document will be queried and the content will be displayed.

df --help: Most programs accept this parameter to return a help description, and some also use -h.

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