Cp/rm/mv parameters

Linux Common commands , Record here for backup and recording , Need to master cp Some parameters of the command , This is an important part of permission control

cp

Parameters	effect
a	-dr --preserve=all
d	If the original file is a linked file , Then copy the linked file attributes
f	If the target file already exists and cannot be opened , Then try again
-i	Interaction , Ask before overwriting
-l	Create a hard link
-p	Copy along with file properties , Instead of using default properties
-r	recursive
-s	Soft link

mv

Parameters	effect
f	mandatory , Force coverage
i	Interaction
u	If the target already exists and the original document is newer , It will be updated.

rm

Parameters	effect
f	force, Ignore the nonexistent , Force deletion of existing
i	Interaction
r	recursive

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