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Dark horse programmer - software testing - 09 stage 2-linux and database -31-43 instructions issued by modifying the file permission letter, - find the link to modify the file, find the file command,

2022-07-04 19:42:00 【Xiaobai's study notes】

24- Authority modification

31- Modify the instructions issued by the letter of file permission

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Command format ：chmod jurisdiction file name
The owner u
User group g
Other groups :o
all ：a
increase + revoke - give =
Permissions represent letters ：r Read w write in x perform
chomod a=rxw demo
chmod u-r,g-w ,o+w demo
File permission modification can be performed repeatedly , Don't worry about correcting errors , It can be corrected at any time

32-linux Case study 7 Alphabet

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chmod u-w ,g-r,o=x cm_Demo

33- Summary of file permission modification command

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The letters represented by the Group ：u The owner ,g User group ,o others ,a All of the above
Empowerment represents the symbol + increase