Access Permission and Protection mode

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Presentation transcript:

Access Permission and Protection mode

Access Permission and Protection mode It is dangerous to access other user’s files therefore access permission settings is required in CNS machine Protection mode is a function which grant or deny access to privates files and directories with other users. Protection mode is a 3x3 combination of “who” and “what”, which determines permission or prohibition for accessing Who? Owner of the file (user) Member of group (group) * All students are in the same group Other (other) Can do what? Read file(read) Write to file (write) Execute file (execute) ×

View and Change Protection Mode Right-click on a directory or a file, then select “Get Info” in the menu. There is “sharing and permission” section at the bottom of the info window. Click to choose

Notice when change protection mode You should be cautious when changing protection mode of some directories Protection mode of following directories should not be changed Home directory Permission for user to execute is required If you change it, you might not be able to login Maildir (Data of mail) If you change it, you might not be able to view mails

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